Search Results: "Ear"
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06:01
More on Elasticity of Demand
310 views / 0 likes  addedLooking a bit deeper at why elasticity changes despite having a linear demand curve More free lessons at: http://www.khanacademy.org/video?v=YOT8ryWzwbY

07:51
Taxes and Perfectly Inelastic Demand
294 views / 0 likes  addedWho bears the burden for the taxes when demand is inelastic More free lessons at: http://www.khanacademy.org/video?v=lsn16U5DWD4

06:52
Taxes and Perfectly Elastic Demand
299 views / 0 likes  addedWho bears the burden for a tax on a good with perfectly elastic demand More free lessons at: http://www.khanacademy.org/video?v=z1yJPpGC3o

11:59
Generalized Linear Consumption Function
274 views / 0 likes  addedGeneralizing a linear consumption function as a function of aggregate income More free lessons at: http://www.khanacademy.org/video?v=N44RZtJ4jj4

12:21
Heart Disease and Heart Attacks
673 views / 1 likes  addedBasics of heart disease, heart attacks, heart failure, angina, cardiac arrest. Special thanks to Edward J Perper, MD for help in clarifying certain aspects of this video. Licensed under CCBYSA More free lessons at: http://www.khanacademy.org/video?v=vYn

07:53
Stenosis, ischemia and heart failure
491 views / 0 likes  addedClarifying a bunch of medical terms around heart disease More free lessons at: http://www.khanacademy.org/video?v=3858MaULDdI

20:47
How Earth's Tilt Causes Seasons
454 views / 0 likes  addedHow being Earth's tilt causes seasons More free lessons at: http://www.khanacademy.org/video?v=05qDIjKevJo

07:12
Gravity for Astronauts in Orbit
368 views / 1 likes  addedWhy do astronauts appear weightless despite being near the Earth? More free lessons at: http://www.khanacademy.org/video?v=oIZVixRTcY

09:31
Scale of Earth and Sun
426 views / 0 likes  addedScale of Earth and Sun More free lessons at: http://www.khanacademy.org/video?v=GZx3U0dbASg

11:20
Richter Scale
470 views / 2 likes  addedThe basics of the logarithmic Richter and Moment Magnitude Scales to measure earthquakes More free lessons at: http://www.khanacademy.org/video?v=RFnIGlayAg

11:15
Logarithmic Scale
296 views / 0 likes  addedUnderstanding how logarithmic scale is different from linear scale and why it could be useful More free lessons at: http://www.khanacademy.org/video?v=sBhEi4L91Sg

08:13
Why Gravity Gets So Strong Near Dense Objects
315 views / 0 likes  addedWhy Gravity Gets So Strong Near Dense Objects More free lessons at: http://www.khanacademy.org/video?v=RpOHZc6cDIw

10:08
Earth Formation
502 views / 0 likes  addedHow the Earth is a the byproduct of a local supernova More free lessons at: http://www.khanacademy.org/video?v=VbNXh0GaLYo

06:56
Vi and Sal Explore How We Think About Scale
369 views / 0 likes  addedVi Hart (http://www.youtube.com/vihart) and Sal talk about how we humans perceive things nonlinearly More free lessons at: http://www.khanacademy.org/video?v=4xfOq00BzJA

07:17
Are Southern Hemisphere Seasons More Severe?
528 views / 0 likes  addedAre Southern Hemisphere seasons more severe because of the eccentricity in Earth's orbit? More free lessons at: http://www.khanacademy.org/video?v=umvNQjzmq4

02:29
Rearrange formulas to isolate specific variables
338 views / 0 likes  addedu10_l1_t4_we2 Rearrange formulas to isolate specific variables More free lessons at: http://www.khanacademy.org/video?v=eTSVTTg_QZ4 Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

09:33
Structure of the Earth
342 views / 0 likes  addedStructure of the Earth  crust, mantle, core More free lessons at: http://www.khanacademy.org/video?v=4AxZ6MOznY

11:50
Compositional and Mechanical Layers of the Earth
579 views / 2 likes  addedCrust, mantle, core, lithosphere, asthenosphere, mesosphere, outer core, inner core More free lessons at: http://www.khanacademy.org/video?v=hHteUIS0OFY

05:50
How we know about the Earth's core
387 views / 0 likes  addedSwave shadow and Pwave detection patterns give us information about the core More free lessons at: http://www.khanacademy.org/video?v=KL0i1RSnpfI

04:12
Correction Calendar Notation
365 views / 0 likes  addedCorrecting the time difference calculation by taking into account that there is no year 0 More free lessons at: http://www.khanacademy.org/video?v=N06JygQog8

12:57
Milankovitch Cycles Precession and Obliquity
331 views / 0 likes  addedHow changes in Earth's rotation can effect Earth's seasons and climate More free lessons at: http://www.khanacademy.org/video?v=ZD8THEz18gc

13:17
Collective Learning
362 views / 0 likes  addedHow symbolic language drives collective learning and how this is one of the truly differentiating aspects of human beings relative to the rest of the animal kingdom More free lessons at: http://www.khanacademy.org/video?v=NqR_dtZu4Mo

11:07
Random Predictions for 2060
250 views / 0 likes  addedSal's random predictions for the year 2060 More free lessons at: http://www.khanacademy.org/video?v=E4rbS0oxg30

07:28
Algebra: Linear Equations 1
321 views / 0 likes  addedequations of the form AX=B More free lessons at: http://www.khanacademy.org/video?v=bAerID24QJ0

06:07
Algebra: Linear Equations 2
293 views / 0 likes  addedsolving equations of the form AX+B=C More free lessons at: http://www.khanacademy.org/video?v=DopnmxeMts

06:45
Algebra: Linear Equations 3
259 views / 0 likes  addedLinear equations with multiple variable and constant terms More free lessons at: http://www.khanacademy.org/video?v=ZnGbH2S0Dk

02:42
Basic Linear Function
296 views / 0 likes  addedU03_L2_T4_we1 : Basic Linear Function Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

04:58
Exploring linear relationships
429 views / 0 likes  addedU03_L2_T4_we2 : Exploring linear relationships More free lessons at: http://www.khanacademy.org/video?v=qPx7i1jwXX4 Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

04:01
Recognizing Linear Functions
270 views / 0 likes  addedU03_L2_T5_we1 : Recognizing Linear Functions More free lessons at: http://www.khanacademy.org/video?v=AZroE4fJqtQ Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

04:09
Exploring nonlinear relationships
373 views / 0 likes  addedU03_L2_T5_we2 : Exploring nonlinear relationships

02:15
Solving and graphing linear inequalities in two variables 1
287 views / 0 likes  addedU05_L2_T1_we1 : Solving and graphing linear inequalities in two variables More free lessons at: http://www.khanacademy.org/video?v=EoCeL4SPIcA Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

02:42
Graphing linear inequalities in two variables 2 (old and redone in newer video)
257 views / 0 likes  addedU05_L2_T1_we2 : Graphing linear inequalities in two variables

03:20
Graphing linear inequalities in two variables 3
270 views / 0 likes  addedU05_L2_T1_we3 : Graphing linear inequalities in two variables More free lessons at: http://www.khanacademy.org/video?v=YBYu5aZPLeg Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

05:45
NonLinear Systems of Equations 1
266 views / 0 likes  addedU10_L2_T2_we1 NonLinear Systems of Equations 1 More free lessons at: http://www.khanacademy.org/video?v=hjigR_rHKDI Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

08:22
NonLinear Systems of Equations 2
245 views / 0 likes  addedU10_L2_T2_we2 NonLinear Systems of Equations 2 More free lessons at: http://www.khanacademy.org/video?v=XPf8LMu7QSw Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

06:57
NonLinear Systems of Equations 3
285 views / 0 likes  addedU10_L2_T2_we3 NonLinear Systems of Equations 3 More free lessons at: http://www.khanacademy.org/video?v=FksgVpM_iXs Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

03:03
Graphing Linear Inequalities in Two Variables Example 2
237 views / 0 likes  addedU05_L2_T1_WE2 Graphing Linear Inequalities in Two Variables More free lessons at: http://www.khanacademy.org/video?v=FnrqBgot3jM Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

13:10
Graphs of Linear Equations
246 views / 0 likes  addedMore free lessons at: http://www.khanacademy.org/video?v=rgvysb9emcQ

11:49
Linear Function Graphs
275 views / 0 likes  addedLinear Function Graphs More free lessons at: http://www.khanacademy.org/video?v=EmTvdKkAUtE

14:58
Linear Equations in Slope Intercept Form
324 views / 0 likes  addedLinear Equations in Slope Intercept Form More free lessons at: http://www.khanacademy.org/video?v=5fkh01mClLU

09:39
Linear Equations in Point Slope Form
315 views / 0 likes  addedLinear Equations in Point Slope Form More free lessons at: http://www.khanacademy.org/video?v=zqCokP2vDGo

10:09
Linear Equations in Standard Form
346 views / 0 likes  addedLinear Equations in Standard Form More free lessons at: http://www.khanacademy.org/video?v=BaQXFstxCMo

08:30
Solving Linear Systems by Graphing
290 views / 0 likes  addedSolving Linear Systems by Graphing More free lessons at: http://www.khanacademy.org/video?v=5a6zpfl50go

09:21
Solving Linear Systems by Substitution
261 views / 0 likes  addedSolving Linear Systems by Substitution More free lessons at: http://www.khanacademy.org/video?v=V7H1oUHXPkg

15:18 Popular
Special Types of Linear Systems
1,188 views / 0 likes  addedSpecial Types of Linear Systems More free lessons at: http://www.khanacademy.org/video?v=5qkyuHIE2GM

08:15
Linear, Quadratic, and Exponential Models
491 views / 0 likes  addedLinear, Quadratic, and Exponential Models

19:55
Embryonic Stem Cells
321 views / 0 likes  addedAn overview of early development of a zygote to an embryo. Embryonic and somatic stem cells. More free lessons at: http://www.khanacademy.org/video?v=yCIMk1x0Pk

14:57
Circulatory System and the Heart
585 views / 0 likes  addedIntroduction to the circulatory system and the heart More free lessons at: http://www.khanacademy.org/video?v=QhiVnFvshZg

11:51
Groups of the Periodic Table
309 views / 0 likes  addedProperties of alkali, alkaline earth and transition metals. Halogens and noble gases. More free lessons at: http://www.khanacademy.org/video?v=LDHg7Vgzses

03:04
MiniVideo on Ion Size
321 views / 0 likes  addedCorrecting a mistake and learning a bit about ion size More free lessons at: http://www.khanacademy.org/video?v=HBi8xjMchZc

10:15
Earnings and EPS
309 views / 0 likes  addedEarnings, EPS (earnings per share) and how they relate to the income statement and balance sheet More free lessons at: http://www.khanacademy.org/video?v=RouNXdkC0do

14:47
Introduction to the PricetoEarnings Ratio
279 views / 0 likes  addedPrice to Earnings Ration (or P/E ratio). More free lessons at: http://www.khanacademy.org/video?v=cppxO67e6eo

15:34
P/E Discussion
283 views / 0 likes  addedDiscussion of the pricetoearnings ratio More free lessons at: http://www.khanacademy.org/video?v=Vrko8jgJ9o

13:41
P/E Conundrum
288 views / 0 likes  addedA situation where the price to earnings ratio seems to not fairly price an asset More free lessons at: http://www.khanacademy.org/video?v=VrFbXxkl9JU

16:59
Alien Abduction Brain Teaser
568 views / 0 likes  addedSaving Earth from becoming a mushroom farm. More free lessons at: http://www.khanacademy.org/video?v=K4pocYXOmTQ

13:07
Statistics: Standard Deviation
282 views / 0 likes  addedReview of what we've learned. Introduction to the standard deviation. More free lessons at: http://www.khanacademy.org/video?v=HvDqbzu0i0E

11:48
Pearson's Chi Square Test (Goodness of Fit)
413 views / 0 likes  addedPearson's Chi Square Test (Goodness of Fit) More free lessons at: http://www.khanacademy.org/video?v=2QeDRsxSF9M

10:45
Correlation and Causality
390 views / 0 likes  addedUnderstanding why correlation does not imply causality (even though many in the press and some researchers often imply otherwise) More free lessons at: http://www.khanacademy.org/video?v=ROpbdOgRUo

09:45
2nd Order Linear Homogeneous Differential Equations 1
347 views / 0 likes  addedIntroduction to 2nd order, linear, homogeneous differential equations with constant coefficients. More free lessons at: http://www.khanacademy.org/video?v=UFWAu8Ptth0

08:28
2nd Order Linear Homogeneous Differential Equations 2
365 views / 0 likes  addedLet's find the general solution! More free lessons at: http://www.khanacademy.org/video?v=SPVqgkOZMAc

05:59
2nd Order Linear Homogeneous Differential Equations 3
329 views / 0 likes  addedLet's use some initial conditions to solve for the particular solution More free lessons at: http://www.khanacademy.org/video?v=UyCwAFQt4v0

09:11
2nd Order Linear Homogeneous Differential Equations 4
404 views / 0 likes  addedAnother example with initial conditions! More free lessons at: http://www.khanacademy.org/video?v=3uO_uPb9H8w

10:11
Undetermined Coefficients 1
345 views / 0 likes  addedUsing the method of undetermined coefficients to solve nonhomogeneous linear differential equations. More free lessons at: http://www.khanacademy.org/video?v=znE4Nq9NJCQ

08:02
3variable linear equations (part 1)
448 views / 0 likes  addedVisual intuition of a 3variable linear equation.

25:34
Linear Algebra: Vector Examples
346 views / 0 likes  addedVisually understanding basic vector operations More free lessons at: http://www.khanacademy.org/video?v=r4bH66vYjss

24:47
Linear Algebra: Parametric Representations of Lines
344 views / 0 likes  addedLinear Algebra: Parametric Representations of Lines in R2 and R3 More free lessons at: http://www.khanacademy.org/video?v=hWhs2cIj7Cw

20:35
Linear Combinations and Span
306 views / 0 likes  addedUnderstanding linear combinations and spans of vectors More free lessons at: http://www.khanacademy.org/video?v=Qm_OS8COwU

15:46
Linear Algebra: Introduction to Linear Independence
334 views / 0 likes  addedLinear Algebra: Introduction to linear dependence and independence More free lessons at: http://www.khanacademy.org/video?v=CrV1xCWdYg

17:38
More on linear independence
340 views / 0 likes  addedMore examples determining linear dependence or independence. More free lessons at: http://www.khanacademy.org/video?v=Alhcv5d_XOs

16:53
Span and Linear Independence Example
320 views / 0 likes  addedDetermining whether 3 vectors are linearly independent and/or span R3 More free lessons at: http://www.khanacademy.org/video?v=9kW6zFK5E5c

23:29
Linear Subspaces
326 views / 0 likes  addedIntroduction to linear subspaces of Rn More free lessons at: http://www.khanacademy.org/video?v=pMFv6liWK4M

19:00
Linear Algebra: Basis of a Subspace
364 views / 0 likes  addedUnderstanding the definition of a basis of a subspace More free lessons at: http://www.khanacademy.org/video?v=zntNi3ybfQ

18:53
Linear Algebra: Vector Triangle Inequality
370 views / 0 likes  addedProving the triangle inequality for vectors in Rn More free lessons at: http://www.khanacademy.org/video?v=PsNidCBr5II

15:47
Linear Algebra: Cross Product Introduction
349 views / 0 likes  addedIntroduction to the cross product More free lessons at: http://www.khanacademy.org/video?v=pJzmiywagfY

17:43
Matrices: Reduced Row Echelon Form 1
388 views / 0 likes  addedSolving a system of linear equations by putting an augmented matrix into reduced row echelon form More free lessons at: http://www.khanacademy.org/video?v=L0CmbneYETs

07:37
Matrices: Reduced Row Echelon Form 2
379 views / 0 likes  addedAnother example of solving a system of linear equations by putting an augmented matrix into reduced row echelon form More free lessons at: http://www.khanacademy.org/video?v=lP1DGtZ8Wys

12:08
Matrices: Reduced Row Echelon Form 3
401 views / 0 likes  addedAnd another example of solving a system of linear equations by putting an augmented matrix into reduced row echelon form More free lessons at: http://www.khanacademy.org/video?v=JVDrlTdzxiI

11:35
Null Space 3: Relation to Linear Independence
442 views / 0 likes  addedUnderstanding how the null space of a matrix relates to the linear independence of its column vectors More free lessons at: http://www.khanacademy.org/video?v=vFctYRhK2M0

08:33
Showing relation between basis cols and pivot cols
395 views / 0 likes  addedShowing that linear independence of pivot columns implies linear independence of the corresponding columns in the original equation More free lessons at: http://www.khanacademy.org/video?v=BfVjTOjvI30

13:53
Linear Transformations
412 views / 0 likes  addedIntroduction to linear transformations More free lessons at: http://www.khanacademy.org/video?v=4PCktDZJH8E

17:04
Matrix Vector Products as Linear Transformations
535 views / 0 likes  addedMatrix Vector Products as Linear Transformations More free lessons at: http://www.khanacademy.org/video?v=ondmopWLiEg

17:32
Linear Transformations as Matrix Vector Products
518 views / 0 likes  addedShowing how ANY linear transformation can be represented as a matrix vector product More free lessons at: http://www.khanacademy.org/video?v=PErhLkQcpZ8

15:09
Sums and Scalar Multiples of Linear Transformations
417 views / 0 likes  addedSums and Scalar Multiples of Linear Transformations. Definitions of matrix addition and scalar multiplication. More free lessons at: http://www.khanacademy.org/video?v=wHuY97vss18

15:13
Linear Transformation Examples: Scaling and Reflections
432 views / 0 likes  addedCreating scaling and reflection transformation matrices (which are diagonal) More free lessons at: http://www.khanacademy.org/video?v=qkfODKmZx4

17:52
Linear Transformation Examples: Rotations in R2
416 views / 0 likes  addedLinear Transformation Examples: Rotations in R2 More free lessons at: http://www.khanacademy.org/video?v=lPWfIq5DzqI

12:21
Compositions of Linear Transformations 1
423 views / 0 likes  addedIntroduction to compositions of Linear Transformations More free lessons at: http://www.khanacademy.org/video?v=f_DTiXZpb8M

16:31
Compositions of Linear Transformations 2
433 views / 0 likes  addedProviding the motivation for definition of matrix products More free lessons at: http://www.khanacademy.org/video?v=BuqcKpe5ZQs

18:14
Linear Algebra: Matrix Product Examples
434 views / 0 likes  addedExample of taking the product of two matrices More free lessons at: http://www.khanacademy.org/video?v=x1z0hOyjapU

18:54
Linear Algebra: Introduction to the inverse of a function
419 views / 0 likes  addedIntroduction to the inverse of a function More free lessons at: http://www.khanacademy.org/video?v=eAzhBZgq28

16:34 Popular
Linear Algebra: Exploring the solution set of Ax=b
1,597 views / 0 likes  addedExploring the solution set of Ax=b (non homogeneous equations) More free lessons at: http://www.khanacademy.org/video?v=1PsNIzUJPkc

20:00
Linear Algebra: Matrix condition for onetoone trans
456 views / 0 likes  addedShowing that the rank of the of an mxn transformation matrix has to be an for the transformation to be onetoone (injective) More free lessons at: http://www.khanacademy.org/video?v=M3FuL9qKTBs

06:37
Linear Algebra: Simplifying conditions for invertibility
405 views / 0 likes  addedShowing that a transformation is invertible if and only if rref(A) is equal to the identity matrix More free lessons at: http://www.khanacademy.org/video?v=Yz2OosyMTmY

21:25
Linear Algebra: Showing that Inverses are Linear
394 views / 0 likes  addedShowing that inverse transformations are also linear More free lessons at: http://www.khanacademy.org/video?v=mr9Tow8hpCg

18:00
Linear Algebra: Deriving a method for determining inverses
411 views / 0 likes  addedDetermining a method for constructing inverse transformation matrices More free lessons at: http://www.khanacademy.org/video?v=6DpzCKJBsz0

06:22
Linear Algebra: Example of Finding Matrix Inverse
426 views / 0 likes  addedExample of calculating the inverse of a matrix More free lessons at: http://www.khanacademy.org/video?v=r9aTLTN16V4

18:20
Linear Algebra: Formula for 2x2 inverse
433 views / 0 likes  addedFiguring out the formula for a 2x2 matrix. Defining the determinant. More free lessons at: http://www.khanacademy.org/video?v=eEUK_ThrHuQ

10:01
Linear Algebra: 3x3 Determinant
446 views / 0 likes  addedDeterminants: Finding the determinant of a 3x3 matrix More free lessons at: http://www.khanacademy.org/video?v=0c7dt2SQfLw

18:40
Linear Algebra: nxn Determinant
416 views / 0 likes  addedDefining the determinant for nxn matrices. An exampled of a 4x4 determinant. More free lessons at: http://www.khanacademy.org/video?v=H9BWRYJNIv4

09:03
Linear Algebra: Determinants along other rows/cols
434 views / 0 likes  addedFinding the determinant by going along other rows or columns More free lessons at: http://www.khanacademy.org/video?v=nu87kfmwNfU

07:18
Linear Algebra: Rule of Sarrus of Determinants
468 views / 0 likes  addedA alternative "short cut" for calculating 3x3 determinants (Rule of Sarrus) More free lessons at: http://www.khanacademy.org/video?v=4xFIi0JF2AM

13:20
Linear Algebra: Determinant when row multiplied by scalar
436 views / 0 likes  addedThe determinant when a row is multiplied by a scalar More free lessons at: http://www.khanacademy.org/video?v=32rdijPBrA

02:52
Linear Algebra: (correction) scalar muliplication of row
542 views / 0 likes  addedCorrection of last video showing that the determinant when one row is multiplied by a scalar is equal to the scalar times the determinant More free lessons at: http://www.khanacademy.org/video?v=WY6QG0mZ7uQ

16:55
Linear Algebra: Determinant when row is added
440 views / 0 likes  addedThe determinant when one matrix has a row that is the sum of the rows of other matrices (and every other term is identical in the 3 matrices) More free lessons at: http://www.khanacademy.org/video?v=VrB3LaSD_uo

08:19
Linear Algebra: Duplicate Row Determinant
461 views / 0 likes  addedDeterminant of a matrix with duplicate rows More free lessons at: http://www.khanacademy.org/video?v=gYv8sttBIqs

10:25
Linear Algebra: Determinant after row operations
426 views / 0 likes  addedWhat happens to the determinant when we perform a row operation More free lessons at: http://www.khanacademy.org/video?v=kpG7xySkivg

08:07
Linear Algebra: Upper Triangular Determinant
451 views / 0 likes  addedThe determinant of an upper triangular matrix More free lessons at: http://www.khanacademy.org/video?v=VX7K8iqoiRc

09:13
Linear Algebra: Simpler 4x4 determinant
490 views / 0 likes  addedCalculating a 4x4 determinant by putting in in upper triangular form first. More free lessons at: http://www.khanacademy.org/video?v=QV0jsTiobU4

21:38
Linear Algebra: Determinant and area of a parallelogram
534 views / 0 likes  addedRealizing that the determinant of a 2x2 matrix is equal to the area of the parallelogram defined by the column vectors of the matrix More free lessons at: http://www.khanacademy.org/video?v=nS63_goDFg

20:10
Linear Algebra: Determinant as Scaling Factor
509 views / 0 likes  addedViewing the determinant of the transformation matrix as a scaling factor of regions More free lessons at: http://www.khanacademy.org/video?v=g3MqSdO5Ubc

08:37
Linear Algebra: Transpose of a Matrix
418 views / 0 likes  addedTranspose of a matrix More free lessons at: http://www.khanacademy.org/video?v=2t0003_sxtU

14:10
Linear Algebra: Determinant of Transpose
458 views / 0 likes  addedProof by induction that transposing a matrix does not change its determinant More free lessons at: http://www.khanacademy.org/video?v=xGV2v0dRNE

08:50
Linear Algebra: Transpose of a Matrix Product
432 views / 0 likes  addedTaking the transpose of the product of two matrices More free lessons at: http://www.khanacademy.org/video?v=UdHgWK13x5I

08:41
Linear Algebra: Transposes of sums and inverses
453 views / 0 likes  addedTransposes of sums and inverses More free lessons at: http://www.khanacademy.org/video?v=Br_8t58mdeI

12:07
Linear Algebra: Transpose of a Vector
410 views / 0 likes  addedTranspose of a column vector. Matrixmatrix products using vectors More free lessons at: http://www.khanacademy.org/video?v=lSoaMCNKfAg

23:19
Linear Algebra: Rowspace and Left Nullspace
416 views / 0 likes  addedRowspace and Left Nullspace More free lessons at: http://www.khanacademy.org/video?v=qBfc57x_RSg

22:08
Linear Algebra: Orthogonal Complements
454 views / 0 likes  addedOrthogonal Complements as subspaces. More free lessons at: http://www.khanacademy.org/video?v=QOTjdgmNqlg

11:14
Linear Algebra: Rank(A) = Rank(transpose of A)
500 views / 0 likes  addedRank(A) = Rank(transpose of A) More free lessons at: http://www.khanacademy.org/video?v=tqqVOWm9YsU

09:27
Linear Algebra: dim(V) + dim(orthogonoal complelent of V)=n
402 views / 0 likes  addedShowing that if V is a subspace of Rn, then dim(V) + dim(V's orthogonal complement) = n More free lessons at: http://www.khanacademy.org/video?v=pGhBfkBqok0

19:38
Linear Alg: Rowspace Solution to Ax=b example
433 views / 0 likes  addedVisualizing the rowspace solution to Ax=b More free lessons at: http://www.khanacademy.org/video?v=qdf2CuMGdKs

12:34
Lin Alg: Showing that Atranspose x A is invertible
463 views / 0 likes  addedShowing that (transpose of A)(A) is invertible if A has linearly independent columns More free lessons at: http://www.khanacademy.org/video?v=ESSMQH6Y5OA

17:26
Linear Algebra: Projections onto Subspaces
459 views / 0 likes  addedProjections onto subspaces More free lessons at: http://www.khanacademy.org/video?v=5B8XluiqdHM

09:28
Linear Alg: Visualizing a projection onto a plane
425 views / 0 likes  addedVisualizing a projection onto a plane. Showing that the old and new definitions of projections aren't that different. More free lessons at: http://www.khanacademy.org/video?v=uWbZlJURkfA

16:16
Lin Alg: A Projection onto a Subspace is a Linear Transforma
457 views / 0 likes  addedShowing that a projection onto a subspace is a linear transformation More free lessons at: http://www.khanacademy.org/video?v=cTyNpXB92bQ

13:04
Linear Algebra: Subspace Projection Matrix Example
539 views / 0 likes  addedExample of a transformation matrix for a projection onto a subspace More free lessons at: http://www.khanacademy.org/video?v=QTcSBB3uVP0

09:05
Linear Alg: Projection is closest vector in subspace
444 views / 0 likes  addedShowing that the projection of x onto a subspace is the closest vector in the subspace to x More free lessons at: http://www.khanacademy.org/video?v=b269qpILOpk

15:32
Linear Algebra: Least Squares Approximation
424 views / 0 likes  addedThe least squares approximation for otherwise unsolvable equations More free lessons at: http://www.khanacademy.org/video?v=MC7l96tW8V8

18:50
Linear Algebra: Least Squares Examples
444 views / 0 likes  addedAn example using the least squares solution to an unsolvable system More free lessons at: http://www.khanacademy.org/video?v=8mAZYv5wIcE

13:25
Linear Algebra: Another Least Squares Example
486 views / 0 likes  addedUsing least squares approximation to fit a line to points More free lessons at: http://www.khanacademy.org/video?v=QkepM8Vv3kw

16:08
Linear Algebra: Coordinates with Respect to a Basis
446 views / 0 likes  addedUnderstanding alternate coordinate systems More free lessons at: http://www.khanacademy.org/video?v=uvgru6FcyxU

17:55
Linear Algebra: Change of Basis Matrix
478 views / 0 likes  addedUsing a change of basis matrix to get us from one coordinate system to another. More free lessons at: http://www.khanacademy.org/video?v=1j5WnqwMdCk

11:16
Linear Algebra: Introduction to Orthonormal Bases
441 views / 0 likes  addedLooking at sets and bases that are orthonormal  or where all the vectors have length 1 and are orthogonal to each other. More free lessons at: http://www.khanacademy.org/video?v=7BFx8pt2aTQ

15:28
Linear Algebra: Coordinates with respect to orthonormal bases
543 views / 0 likes  addedSeeing that orthonormal bases make for good coordinate systems More free lessons at: http://www.khanacademy.org/video?v=SWbis2zWIvo

19:24
Linear Algebra: The GramSchmidt Process
433 views / 0 likes  addedFinding an orthonormal basis for a subspace using the GramSchmidt Process More free lessons at: http://www.khanacademy.org/video?v=rHonltF77zI

13:14
Linear Algebra: GramSchmidt Process Example
438 views / 0 likes  addedUsing GramSchmidt to find an orthonormal basis for a plane in R3 More free lessons at: http://www.khanacademy.org/video?v=tu1GPtfsQ7M

13:57
Linear Algebra: GramSchmidt example with 3 basis vectors
488 views / 0 likes  addedGramSchmidt example with 3 basis vectors More free lessons at: http://www.khanacademy.org/video?v=ZRRG386v6DI

07:43
Linear Algebra: Introduction to Eigenvalues and Eigenvectors
442 views / 0 likes  addedWhat eigenvectors and eigenvalues are and why they are interesting More free lessons at: http://www.khanacademy.org/video?v=PhfbEr2btGQ

09:19
Linear Algebra: Proof of formula for determining Eigenvalues
477 views / 0 likes  addedProof of formula for determining Eigenvalues More free lessons at: http://www.khanacademy.org/video?v=rfm0wQObxjk

05:39
Linear Algebra: Example solving for the eigenvalues of a 2x2 matrix
468 views / 0 likes  addedExample solving for the eigenvalues of a 2x2 matrix More free lessons at: http://www.khanacademy.org/video?v=pZ6mMVEE89g

14:34
Linear Algebra: Finding Eigenvectors and Eigenspaces example
489 views / 0 likes  addedFinding the eigenvectors and eigenspaces of a 2x2 matrix More free lessons at: http://www.khanacademy.org/video?v=3xfmbdzkqc

14:08
Linear Algebra: Eigenvalues of a 3x3 matrix
457 views / 0 likes  addedDetermining the eigenvalues of a 3x3 matrix More free lessons at: http://www.khanacademy.org/video?v=11dNghWC4HI

15:34
Linear Algebra: Eigenvectors and Eigenspaces for a 3x3 matrix
436 views / 0 likes  addedEigenvectors and eigenspaces for a 3x3 matrix More free lessons at: http://www.khanacademy.org/video?v=3Md5KCCQX0

13:09
Linear Algebra: Showing that an eigenbasis makes for good coordinate systems
484 views / 0 likes  addedShowing that an eigenbasis makes for good coordinate systems More free lessons at: http://www.khanacademy.org/video?v=C2PC9185gIw

07:53
Total Final Velocity for Projectile
318 views / 0 likes  addedCalculating the total final velocity for a projectile landing at a different altitude (mistake near end: I write 29.03 when it should be 26.03 m/s and the final total magnitude should be 26.55 m/s 78.7 degrees below horizontal More free lessons at: http:/

07:18
Normal Force and Contact Force
311 views / 0 likes  addedThe force that keeps a block of ice from falling towards the center of the earth More free lessons at: http://www.khanacademy.org/video?v=1WOrgrIcQZU

10:04
Introduction to Harmonic Motion
274 views / 0 likes  addedIntuition behind the motion of a mass on a spring (some calculus near the end). More free lessons at: http://www.khanacademy.org/video?v=Nk2q_jkJVs

11:40
Circuits (part 1)
316 views / 0 likes  addedIntroduction to electricity, circuits, current and resistance More free lessons at: http://www.khanacademy.org/video?v=3o8_EARoMtg

07:31
Viewing g as the value of Earth's Gravitational Field Near the Surface
324 views / 0 likes  addedViewing g as the value of Earth's gravitational field near the surface rather than the acceleration due to gravity near Earth's surface for an object in freefall More free lessons at: http://www.khanacademy.org/video?v=1E3Z_R5AHdg

06:47
Introduction: Crash Course U.S. Government and Politics
535 views / 0 likes  addedIn which Craig Benzine introduces a brand new Crash Course about U.S. Government and Politics! This course will provide you with an overview of how the government of the United States is supposed to function, and we'll get into how it actually does functi

08:28
Congressional Committees: Crash Course Government and Politics #7
455 views / 0 likes  addedThis week Craig Benzine clears up the role of committees in Congress. We’ll talk about standing committees, joint committees, conference committees, and caucuses (and not the candidatechoosing kinds) as well as the staff agencies that help advise these c

12:12
Introduction to Astronomy: Crash Course Astronomy #1
452 views / 2 likes  addedWelcome to the first episode of Crash Course Astronomy. Your host for this intergalactic adventure is the Bad Astronomer himself, Phil Plait. We begin with answering a question: "What is astronomy?"  Table of Contents: What is Astronomy? 3:00 Who Studie

09:29
Cycles in the Sky: Crash Course Astronomy #3
386 views / 0 likes  addedThis week we build on our naked eye observations from last week and take a look at the cyclical phenomena that we can see at work in the universe.  Table of Contents: Naked Eye Observations 0:28.4 Constellations 3:09.7 The Color of Stars 2:44.5 View of

09:46 Popular
Moon Phases: Crash Course Astronomy #4
1,143 views / 2 likes  addedIn this episode of Crash Course Astronomy, Phil takes you through the cause and name of the Moon's phases.  Why the Moon Has Phases 0:36.1 Spheres in Orbit 1:05.4 Name of the Moon Phases 2:25.5 How We See It 7:48.2  PBS Digital Studios: http://youtube

10:32
Eclipses: Crash Course Astronomy #5
496 views / 0 likes  addedThe big question in the comments last week was, "BUT WHAT ABOUT ECLIPSES?" Today, Phil breaks 'em down for you. This episode is sponsored by Squarespace: http://www.squarespace.com/crashcourse  As promised, Phil's sun spotting recommendations: Astronome

10:03
The Gravity of the Situation: Crash Course Astronomy #7
499 views / 0 likes  addedIn today's episode, Phil looks at how gravity plays out across the universe. This episode is sponsored by Squarespace: http://www.squarespace.com/crashcourse  Gravity is a Force 2:17 Different Types of Orbit 3:41 Escape Velocity 5:30 Weightless Mass 7:0

10:17
Introduction to the Solar System: Crash Course Astronomy #9
648 views / 1 likes  addedIn today's Crash Course Astronomy, Phil takes a look at the explosive history of our cosmic backyard. We explore how we went from a giant ball of gas to the system of planets and other celestial objects we have today. This episode is sponsored by Squaresp

12:04
The Sun: Crash Course Astronomy #10
519 views / 1 likes  addedPhil takes us for a closer (eye safe!) look at the twooctillion ton star that rules our solar system. We look at the sun's core, plasma, magnetic fields, sunspots, solar flares, coronal mass ejections, and what all of that means for our planet. This epis

10:14
The Earth: Crash Course Astronomy #11
612 views / 0 likes  addedPhil starts the planetbyplanet tour of the solar system right here at home, Earth.  Table of Contents Earth is a Planet 0:03 Layers of Earth 1:25 The Magnetic Field 5:10 Atmosphere and the Human Influence 6:14  PBS Digital Studios: http://youtube.co

09:51
The Moon: Astronomy #12
648 views / 1 likes  addedJoin Phil for a tour of our capitalM Moon, from surface features, inside to the core, and back in time to theories about its formation. This episode is brought to you by Squarespace: http://www.squarespace.com/crashcourse  Table of Contents Many Millio

10:43
Tissues, Part 1: Crash Course A&P #2
478 views / 0 likes  added•••SUBBABLE MESSAGE••• TO: Jordan Schoonover FROM: Mom, Dad&Madison Happy Birthday Jordan! We love you sweetheart!! *** You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything w

09:43
Tissues, Part 4  Types of Connective Tissues: Crash Course A&P #5
567 views / 0 likes  added•••SUBBABLE MESSAGE••• TO: the world. FROM: Laura Love Rathbun Learning is the best thing to do with your you! *** You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're

14:33
The Sun&The Earth: Crash Course Big History #3
531 views / 1 likes  addedIn which John Green, Hank Green, and Emily Graslie teach you about our Sun, and the formation of the planets. We're going to focus on the formation and development of the Earth, because that's where people live. You'll learn about the Solar nebula, the bi

13:29
Life Begins: Crash Course Big History #4
577 views / 0 likes  addedIn which Hank and John Green teach you about life on Earth. They won't be giving advice on how life should be lived, because this is a history series. Instead, they'll teach you about the earliest forms of life on Earth, and some of the ways that they dev

15:05
The Evolutionary Epic: Crash Course Big History #5
402 views / 0 likes  addedIn which John Green, Hank Green, and Emily Graslie teach you about evolution. So, in the last 3.8 billion years, life on Earth has evolved from singlecelled prokaryotes to the dizzying array of life we have today. So how did all this happen? We'll talk a

16:14
Human Evolution: Crash Course Big History #6
677 views / 1 likes  addedIn which John Green and Hank Green teach you about how human primates moved out of Africa and turned Earth into a reallife Planet of the Apes. And the apes are people! John and Hank teach you about how humans evolved, and the sort of tricks they picked u

13:41 Popular
Migrations and Intensification: Crash Course Big History #7
708 views / 0 likes  addedIn which Hank and John Green teach you about humanity conquering the Earth. Or at least moving from Africa into the rest of the Earth. As human beings spread out across the world and populations grew, humanity reached a critical mass of innovators, and co

13:58
The Modern Revolution: Crash Course Big History #8
462 views / 0 likes  addedIn which Hank and John Green teach you a Crash Course on the modern revolution, and the upside of the progress that humanity has made in the last 500 years or so. And while there are two sides to every history, and many of these changes haven't been great

12:20
The Anthropocene and the Near Future: Crash Course Big History #9
443 views / 0 likes  addedIn which John Green, Hank Green, and Emily Graslie teach you about the Anthropocene, an unofficial geological era that covers the last century or so, in which humanity has made massive progress. We've discovered the HiggsBoson particle, and awesome elect

13:31
The Deep Future: Crash Course Big History #10
514 views / 1 likes  addedFinally, after what seems like eons and eons, the end is nigh. We're talking not only about the end of Crash Course Big History, but also the end of everything. The end of humanity and the end of the universe.John and Hank Green will teach you about what

13:43
Rethinking Civilization  Crash Course World History 201
412 views / 0 likes  addedIn which John Green returns to teaching World History! This week, we'll be talking about the idea of civilization, some of the traditional hallmarks of socalled civilization, and why some people would choose to live outside the civilization model. It tur

14:04
Money&Debt: Crash Course World History 202
590 views / 0 likes  addedIn which John Green teaches about filthy, filthy lucre. Money. And Debt. So, what is money? And what is it for? And why do we use money? And why does it all disappear so quickly after payday? John will look into 75% of these questions, and if he doesn't c

09:10 Popular
HOW World War I Started: Crash Course World History 209
978 views / 6 likes  addedIn which John Green teaches you about World War I and how it got started. Crash Course doesn't usually talk much about dates, but the way that things unfolded in July and August of 1914 are kind of important to understanding the Great War. You'll learn ab

12:59
The End of Civilization (In the Bronze Age): Crash Course World History 211
531 views / 1 likes  addedIn which John Green teaches you about the Bronze Age civilization in what we today call the middle east, and how the vast, interconnected civilization that encompassed Egypt, The Levant, and Mesopotamia came to an end. What's that you say? There was no su

12:55
Asian Responses to Imperialism: Crash Course World History #213
542 views / 0 likes  addedIn which John Green teaches you about Imperialism, but not from the perspective of the colonizers. This week John looks at some Asian perspectives on Imperialism, specifically writers from countries that were colonized by European powers. We'll look at th

12:31
The Railroad Journey and the Industrial Revolution: Crash Course World History 214
359 views / 1 likes  addedIn which John Green teaches you about railroads, and some of the ways they changed the world, and how they were a sort of microcosm for the Industrial Revolution as a whole. Prior to the invention of steam powered railroads, pretty much all locomotion had

12:51 Popular
Population, Sustainability, and Malthus: Crash Course World History 215
836 views / 0 likes  addedIn which John Green teaches you about population. So, how many people can reasonably live on the Earth? Thomas Malthus got it totally wrong in the 19th century, but for some reason, he keeps coming up when we talk about population. In 1800, the human popu

12:53
Conflict in Israel and Palestine: Crash Course World History 223
428 views / 0 likes  addedIn which John Green teaches you about conflict in Israel and Palestine. This conflict is often cast as a longterm beef going back thousands of years, and rooted in a clash between religions. Well, that's not quite true. What is true is that the conflict

11:18
The Vikings!  Crash Course World History 224
635 views / 3 likes  addedIn which John Green teaches you about Vikings! That's right, one of our most requested subjects, the Vikings, right here on Crash Course. So what's the deal with Vikings? Well, the stuff you've heard about them may not be true. The Vikings weren't just pa

12:14
War and Nation Building in Latin America: Crash Course World History 225
589 views / 0 likes  addedIn which John Green teaches you about nation building and nationalism in Latin America. Sometimes, the nations of Latin America get compared to the nations of Europe, and are found wanting. This is kind of a silly comparison. The rise of democratic, econo

10:51
Psychological Research  Crash Course Psychology #2
466 views / 1 likes  addedYou can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can afford to pay a little every month, it really helps us to continue producing great content.

10:24
Homunculus  Crash Course Psychology #6
399 views / 0 likes  addedYou can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can afford to pay a little every month, it really helps us to continue producing great content.

11:50 Popular
How to Train a Brain  Crash Course Psychology #11
709 views / 0 likes  addedYou can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can afford to pay a little every month, it really helps us to continue producing great content.

09:35
The Bobo Beatdown  Crash Course Psychology #12
551 views / 0 likes  addedYou can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can afford to pay a little every month, it really helps us to continue producing great content.

11:08
Measuring Personality: Crash Course Psychology #22
604 views / 1 likes  addedYou can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can afford to pay a little every month, it really helps us to continue producing great content.

10:51
Feeling All the Feels: Crash Course Psychology #25
441 views / 1 likes  added***Subbable Message*** To Robert, Thank you for showing me the world, darling! From Amy and That's happiness; to be dissolved into something complete and great. From Ty Scaletta ****** You can directly support Crash Course at http://www.subbable.com/crash

10:10
Psychological Disorders: Crash Course Psychology #28
558 views / 0 likes  added***SUBBABLE MESSAGES*** To: Lola From: Daddy You are the best, I love you. *** To: Future Lia From: Mom and Dad Remember that learning isn't just useful, but also really fun! *** You can directly support Crash Course at http://www.subbable.com/crashcourse

11:32
OCD&Anxiety Disorders: Crash Course Psychology #29
481 views / 0 likes  addedYou can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can afford to pay a little every month, it really helps us to continue producing great content.

10:12
Eating and Body Dysmorphic Disorders: Crash Course Psychology #33
465 views / 0 likes  addedGet Help: If you think you have an eating disorder, please contact http://www.nationaleatingdisorders.org/ for help! You can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we'r

11:23
Getting Help  Psychotherapy: Crash Course Psychology #35
441 views / 0 likes  addedYou can directly support Crash Course at http://www.subbable.com/crashcourse Subscribe for as little as $0 to keep up with everything we're doing. Also, if you can afford to pay a little every month, it really helps us to continue producing great content.

10:12
The Nucleus: Crash Course Chemistry #1
446 views / 0 likes  addedHank does his best to convince us that chemistry is not torture, but is instead the amazing and beautiful science of stuff. Chemistry can tell us how three tiny particles  the proton, neutron and electron  come together in trillions of combinations to f

11:24
Unit Conversion&Significant Figures: Crash Course Chemistry #2
377 views / 0 likes  addedA unit is the frequently arbitrary designation we have given to something to convey a definite magnitude of a physical quantity and every quantity can be expressed in terms of the seven base units that are contained in the international system of units. H

11:22 Popular
The Periodic Table: Crash Course Chemistry #4
713 views / 1 likes  addedHank gives us a tour of the most important table ever, including the life story of the obsessive man who championed it, Dmitri Mendeleev. The periodic table of elements is a concise, informationdense catalog of all of the different sorts of atoms in the

13:34
Water and Solutions  for Dirty Laundry: Crash Course Chemistry #7
502 views / 0 likes  addedDihydrogen monoxide (better know as water) is the key to nearly everything. It falls from the sky, makes up 60% of our bodies, and just about every chemical process related to life takes place with it or in it. Without it, none of the chemical reactions t

11:31
Precipitation Reactions: Crash Course Chemistry #9
321 views / 0 likes  addedA lot of ionic compounds dissolve in water, dissociating into individual ions. But when two ions find each other that form an insoluble compound, they suddenly fall out of solution in what's called a precipitation reaction. In this episode of Crash Course

11:13
Redox Reactions: Crash Course Chemistry #10
379 views / 0 likes  addedAll the magic that we know is in the transfer of electrons. Reduction (gaining electrons) and oxidation (the loss of electrons) combine to form Redox chemistry, which contains the majority of chemical reactions. As electrons jump from atom to atom, they c

10:43
How To Speak Chemistrian: Crash Course Chemistry #11
339 views / 0 likes  addedLearning to talk about chemistry can be like learning a foreign language, but Hank is here to help with some straightforward and simple rules to help you learn to speak Chemistrian like a native. Table of Contents Determining Formulas and Names of Monatom

11:35
Real Gases: Crash Course Chemistry #14
336 views / 0 likes  addedHank bursts our ideal gas law bubble, er, balloon, and brings us back to reality, explaining how the constants in the gas law aren't all that constant; how the ideal gas law we've spent the past two weeks with has to be corrected for volume because atoms

11:26
Passing Gases: Effusion, Diffusion and the Velocity of a Gas  Crash Course Chemistry #16
320 views / 0 likes  addedWe have learned over the past few weeks that gases have reallife constraints on how they move here in the nonideal world. As with most things in chemistry (and also in life) how a gas moves is more complex than it at first appears. In this episode, Hank

11:24
Enthalpy: Crash Course Chemistry #18
427 views / 0 likes  addedEnergy is like the bestest best friend ever and yet, most of the time we take it for granted. Hank feels bad for our friend and wants us to learn more about it so that we can understand what it's trying to tell us  like that any bond between two atoms co

13:41
Entropy: Embrace the Chaos! Crash Course Chemistry #20
461 views / 0 likes  addedLife is chaos and the universe tends toward disorder. But why? If you think about it, there are only a few ways for things to be arranged in an organized manner, but there are nearly infinite other ways for those same things to be arranged. Simple rules o
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