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  • 08:45 States of Matter Follow-Up

    States of Matter Follow-Up

    325 views / 1 likes - added

    More on Plasma and Hydrogen bonds. More free lessons at: http://www.khanacademy.org/video?v=WenwtcuqOj8

  • 07:22 More Exponential Decay Examples

    More Exponential Decay Examples

    188 views / 0 likes - added

    A few more examples of exponential decay. More free lessons at: http://www.khanacademy.org/video?v=Hqzakjo_dYg

  • 12:32 Inflation, Deflation&Capacity Utilization

    Inflation, Deflation&Capacity Utilization

    213 views / 0 likes - added

    A discussion of inflation and deflation More free lessons at: http://www.khanacademy.org/video?v=LXrPdFn7Gn4

  • 04:16 Floating Exchange Effect on US

    Floating Exchange Effect on US

    299 views / 0 likes - added

    Floating Exchange Effect on US More free lessons at: http://www.khanacademy.org/video?v=K0GF4FT51qY

  • 13:27 Binomial Distribution 3

    Binomial Distribution 3

    265 views / 0 likes - added

    Basketball binomial distribution More free lessons at: http://www.khanacademy.org/video?v=vKNpQ_KTXvE

  • 11:02 Banking 6: Bank Notes and Checks

    Banking 6: Bank Notes and Checks

    277 views / 0 likes - added

    More on how bank notes and checks can be used. More free lessons at: http://www.khanacademy.org/video?v=IOzZVmgK3IM

  • 10:40 Wealth Destruction 2

    Wealth Destruction 2

    267 views / 0 likes - added

    How bubbles destroy wealth. More free lessons at: http://www.khanacademy.org/video?v=eRImmzuExyg

  • 09:00 401(k)-

    401(k)-

    239 views / 0 likes - added

    401(k)s (and how they compare to IRAs) More free lessons at: http://www.khanacademy.org/video?v=2zfdtmlMNDs

  • 05:20 Introduction to i and Imaginary Numbers

    Introduction to i and Imaginary Numbers

    316 views / 0 likes - added

    Introduction to i and imaginary numbers More free lessons at: http://www.khanacademy.org/video?v=ysVcAYo7UPI

  • 14:20 Currency Effect on Trade

    Currency Effect on Trade

    253 views / 0 likes - added

    Currency Effect on Trade More free lessons at: http://www.khanacademy.org/video?v=5HVCFrXQ9pw

  • 08:27 Naming Alkenes Examples

    Naming Alkenes Examples

    175 views / 0 likes - added

    Naming Alkenes Examples More free lessons at: http://www.khanacademy.org/video?v=KWv5PaoHwPA

  • 10:59 Ether Naming and Introduction

    Ether Naming and Introduction

    209 views / 0 likes - added

    Ether Naming and Introduction More free lessons at: http://www.khanacademy.org/video?v=roUGDG1rhPI

  • 11:50 Inflation, Deflation&Capacity Utilization 2

    Inflation, Deflation&Capacity Utilization 2

    210 views / 0 likes - added

    More on inflation and capacity utilization More free lessons at: http://www.khanacademy.org/video?v=cugQ4z4cJF8

  • 15:47 Linear Algebra: Cross Product Introduction

    Linear Algebra: Cross Product Introduction

    244 views / 0 likes - added

    Introduction to the cross product More free lessons at: http://www.khanacademy.org/video?v=pJzmiywagfY

  • 06:59 Unit Vectors

    Unit Vectors

    336 views / 0 likes - added

    What unit vectors are and how to construct them More free lessons at: http://www.khanacademy.org/video?v=lQn7fksaDq0

  • 12:37 Electric Potential Energy

    Electric Potential Energy

    251 views / 0 likes - added

    Introduction to electric potential More free lessons at: http://www.khanacademy.org/video?v=elJUghWSVh4

  • 11:00 Specular and Diffuse Reflection

    Specular and Diffuse Reflection

    178 views / 0 likes - added

    Specular and Diffuse Reflection More free lessons at: http://www.khanacademy.org/video?v=sd0BOnN6aNY

  • 01:31 Intro to Cryptography

    Intro to Cryptography

    304 views / 0 likes - added

    The basic idea behind why we need cryptography More free lessons at: http://www.khanacademy.org/video?v=Kf9KjCKmDcU

  • 05:55 Marginal Revenue Below Average Total Cost

    Marginal Revenue Below Average Total Cost

    195 views / 0 likes - added

    Why it is rational to produce at a loss More free lessons at: http://www.khanacademy.org/video?v=ni0TL4pXG5w

  • 10:03 Carbon 14 Dating 1

    Carbon 14 Dating 1

    295 views / 0 likes - added

    Carbon 14 Dating 1 More free lessons at: http://www.khanacademy.org/video?v=8wYvKeSK1IY

  • 16:22 Tau versus Pi

    Tau versus Pi

    254 views / 0 likes - added

    Why Tau might be a better number to look at than Pi More free lessons at: http://www.khanacademy.org/video?v=1jDDfkKKgmc

  • 06:41 Lifecycle of Massive Stars

    Lifecycle of Massive Stars

    293 views / 0 likes - added

    Lifecycle of Massive Stars More free lessons at: http://www.khanacademy.org/video?v=UhIwMAhZpCo

  • 09:03 Naming Alkyl Halides

    Naming Alkyl Halides

    152 views / 0 likes - added

    Naming Alkyl Halides More free lessons at: http://www.khanacademy.org/video?v=jiJdNWzETSk

  • 11:49 Linear Function Graphs

    Linear Function Graphs

    189 views / 0 likes - added

    Linear Function Graphs More free lessons at: http://www.khanacademy.org/video?v=EmTvdKkAUtE

  • 16:05 Graphs of Quadratic Functions

    Graphs of Quadratic Functions

    249 views / 0 likes - added

    Graphs of Quadratic Functions More free lessons at: http://www.khanacademy.org/video?v=RjkTEyO5Zso

  • 21:06 Asymptotes of Rational Functions

    Asymptotes of Rational Functions

    253 views / 0 likes - added

    Asymptotes of Rational Functions More free lessons at: http://www.khanacademy.org/video?v=2N62v_63SBo

  • 08:20 Mean and Variance of Bernoulli Distribution Example

    Mean and Variance of Bernoulli Distribution Example

    280 views / 0 likes - added

    Mean and Variance of Bernoulli Distribution Example More free lessons at: http://www.khanacademy.org/video?v=O8vB1eInP_8

  • 05:38 Separable differential equations 2

    Separable differential equations 2

    287 views / 0 likes - added

    Another separable differential equation example. More free lessons at: http://www.khanacademy.org/video?v=xVWCfMe97ws

  • 10:12 Complex roots of the characteristic equations 3

    Complex roots of the characteristic equations 3

    206 views / 0 likes - added

    Lets do an example with initial conditions! More free lessons at: http://www.khanacademy.org/video?v=rGaM6pwqhB0

  • 14:27 Singular Matrices

    Singular Matrices

    256 views / 0 likes - added

    When and why you can't invert a matrix. More free lessons at: http://www.khanacademy.org/video?v=UqyN7-tRS00

  • 08:18 Basic Probability

    Basic Probability

    297 views / 0 likes - added

    An introduction to probability More free lessons at: http://www.khanacademy.org/video?v=uzkc-qNVoOk

  • 05:23 Probability (part 8)

    Probability (part 8)

    362 views / 0 likes - added

    Introduction to Bayes' Theorem More free lessons at: http://www.khanacademy.org/video?v=VVr8snbaxZg

  • 10:35 Mechanical Advantage (part 3)

    Mechanical Advantage (part 3)

    220 views / 0 likes - added

    Introduction to pulleys and wedges More free lessons at: http://www.khanacademy.org/video?v=vSsK7Rfa3yA

  • 10:35 Deep Voice Gas - Sulfur Hexafluoride Experiments (SF6)

    Deep Voice Gas - Sulfur Hexafluoride Experiments (SF6)

    121 views / 0 likes - added

    Craig Beals experiments with Sulfur Hexafluoride (SF6), a gas that is five times heavier than air. When breathed, the gas does the opposite of helium, it makes your voice very deep because it is so dense. Craig also experiments with pouring the sulfur hex

  • 08:15 Sand Ball ! LOL Pet Surprise Mixing All Sand - Blind Bag Cookie Swirl Video

    Sand Ball ! LOL Pet Surprise Mixing All Sand - Blind Bag Cookie Swirl Video

    341 views / 5 likes - added

    Ready to mix all the Surprise Pets sand together! What will the sand ball look like? Is there a surprise in side? Let's see. FREE Subscription Never miss a video! Click here : http://bit.ly/1RYkDF6 ~~~~~~~~ Play The official Cookie Swirl World App Game fo

  • 19:24 States of Matter

    States of Matter

    334 views / 0 likes - added

    Introduction to the states or phases of matter. More free lessons at: http://www.khanacademy.org/video?v=pKvo0XWZtjo

  • 01:35 Adding subtracting mixed numbers 0.5 (ex 1)

    Adding subtracting mixed numbers 0.5 (ex 1)

    287 views / 0 likes - added

    Adding subtracting mixed numbers 0.5 (ex 1) More free lessons at: http://www.khanacademy.org/video?v=EGy1W24EPEI

  • 13:47 What it means to buy a company's stock

    What it means to buy a company's stock

    200 views / 0 likes - added

    What it means to buy a company's stock More free lessons at: http://www.khanacademy.org/video?v=98qfFzqDKR8

  • 09:01 Inflation Overview

    Inflation Overview

    248 views / 0 likes - added

    Overview of price inflation and how it is calculated More free lessons at: http://www.khanacademy.org/video?v=-Z5kkfrEc8I

  • 06:30 Social Security Intro

    Social Security Intro

    251 views / 0 likes - added

    Basics on how social security works More free lessons at: http://www.khanacademy.org/video?v=gLHUCUv1e5Y

  • 04:39 Seasons Aren't Dictated by Closeness to Sun

    Seasons Aren't Dictated by Closeness to Sun

    260 views / 0 likes - added

    Why our closeness to the sun does not dictate the seasons More free lessons at: http://www.khanacademy.org/video?v=SJUd5du0T08

  • 03:11 U09_L1_T2_we3 Factoring Trinomials by Grouping 3

    U09_L1_T2_we3 Factoring Trinomials by Grouping 3

    200 views / 0 likes - added

    U09_L1_T2_we3 Factoring Trinomials by Grouping 3 More free lessons at: http://www.khanacademy.org/video?v=fVIZmOQBS5M

  • 12:01 Solving Systems of Equations by Multiplication

    Solving Systems of Equations by Multiplication

    260 views / 0 likes - added

    Solving Systems of Equations by Multiplication More free lessons at: http://www.khanacademy.org/video?v=wYrxKGt_bLg

  • 12:36 Phase Diagrams

    Phase Diagrams

    191 views / 0 likes - added

    Understanding and interpreting phase diagrams More free lessons at: http://www.khanacademy.org/video?v=Qp87Z4m8R-w

  • 17:40 First Law of Thermodynamics/ Internal Energy

    First Law of Thermodynamics/ Internal Energy

    244 views / 0 likes - added

    First law of thermodynamic and Internal Energy More free lessons at: http://www.khanacademy.org/video?v=Xb05CaG7TsQ

  • 14:07 EBITDA

    EBITDA

    168 views / 0 likes - added

    Review of Enterprise Value and comparing it to EBITDA More free lessons at: http://www.khanacademy.org/video?v=v4Fq9LEspzw

  • 06:59 Bernoulli Distribution Mean and Variance Formulas

    Bernoulli Distribution Mean and Variance Formulas

    312 views / 0 likes - added

    Bernoulli Distribution Mean and Variance Formulas More free lessons at: http://www.khanacademy.org/video?v=ry81_iSHt6E

  • 10:07 Hypothesis Test for Difference of Means

    Hypothesis Test for Difference of Means

    337 views / 0 likes - added

    Hypothesis Test for Difference of Means More free lessons at: http://www.khanacademy.org/video?v=N984XGLjQfs

  • 10:25 Bailout 7: Bank goes into bankruptcy

    Bailout 7: Bank goes into bankruptcy

    290 views / 0 likes - added

    What happens when there is no equity infusion and the bank goes in to bankruptcy. More free lessons at: http://www.khanacademy.org/video?v=MdIfefLcdoU

  • 08:52 Banking 9: More on Reserve Ratios (Bad sound)

    Banking 9: More on Reserve Ratios (Bad sound)

    288 views / 0 likes - added

    Seeing how reserve ratios limit how much lending I can do. More free lessons at: http://www.khanacademy.org/video?v=DFPBdbx0vFc

  • 03:37 LIBOR

    LIBOR

    285 views / 0 likes - added

    London InterBank Offer Rate More free lessons at: http://www.khanacademy.org/video?v=wBCowBiXV7A

  • 11:58 Repeated roots of the characteristic equation

    Repeated roots of the characteristic equation

    206 views / 0 likes - added

    What happens when the characteristic equation only has 1 repeated root? More free lessons at: http://www.khanacademy.org/video?v=NW9JfMvIsxw

  • 10:08 Fluids (part 8)

    Fluids (part 8)

    171 views / 0 likes - added

    Beginning of the proof of Bernoulli's Equation. More free lessons at: http://www.khanacademy.org/video?v=uqyLOuAzbvo

  • 13:17 Price Elasticity of Demand

    Price Elasticity of Demand

    220 views / 0 likes - added

    Introduction to price elasticity of demand More free lessons at: http://www.khanacademy.org/video?v=slP8XZ6Nq40

  • 06:38 Tragedy of the Commons

    Tragedy of the Commons

    169 views / 0 likes - added

    How public resources can be abused More free lessons at: http://www.khanacademy.org/video?v=0b2Tl0x-niw

  • 12:05 Keynesian Economics

    Keynesian Economics

    181 views / 0 likes - added

    Contrasting Keynesian and Classical Thinking More free lessons at: http://www.khanacademy.org/video?v=hPkh8kOldU4

  • 09:57 Connecting the Keynesian Cross to the IS-Curve

    Connecting the Keynesian Cross to the IS-Curve

    171 views / 0 likes - added

    Introduction to the Investment/Savings curve More free lessons at: http://www.khanacademy.org/video?v=AW3bPaErUWU

  • 07:31 FICA Tax

    FICA Tax

    187 views / 0 likes - added

    How the FICA tax is calculated and what it stands for More free lessons at: http://www.khanacademy.org/video?v=UP9xy2eVj7s

  • 08:13 Why Gravity Gets So Strong Near Dense Objects

    Why Gravity Gets So Strong Near Dense Objects

    218 views / 0 likes - added

    Why Gravity Gets So Strong Near Dense Objects More free lessons at: http://www.khanacademy.org/video?v=RpOHZc6cDIw

  • 12:04 Polymerization of Alkenes with Acid

    Polymerization of Alkenes with Acid

    195 views / 0 likes - added

    Polymerization of Alkenes with Acid More free lessons at: http://www.khanacademy.org/video?v=tR-hzV5Tkxo

  • 15:18 Popular Special Types of Linear Systems

    Special Types of Linear Systems

    828 views / 0 likes - added

    Special Types of Linear Systems More free lessons at: http://www.khanacademy.org/video?v=5qkyuHIE2GM

  • 17:49 pH of a Weak Acid

    pH of a Weak Acid

    181 views / 0 likes - added

    Calculating the pH of a weak acid More free lessons at: http://www.khanacademy.org/video?v=dencuBNp_Ck

  • 11:53 Bailout 8: Systemic Risk

    Bailout 8: Systemic Risk

    267 views / 0 likes - added

    How the banks are connected. What happens when one bank fails. More free lessons at: http://www.khanacademy.org/video?v=gX9aKDeAOz4

  • 14:19 Vector Transformations

    Vector Transformations

    286 views / 0 likes - added

    Introduction to the notion of vector transformations More free lessons at: http://www.khanacademy.org/video?v=gAbadNuQEjI

  • 12:21 Compositions of Linear Transformations 1

    Compositions of Linear Transformations 1

    309 views / 0 likes - added

    Introduction to compositions of Linear Transformations More free lessons at: http://www.khanacademy.org/video?v=f_DTiXZpb8M

  • 08:50 Linear Algebra: Transpose of a Matrix Product

    Linear Algebra: Transpose of a Matrix Product

    314 views / 0 likes - added

    Taking the transpose of the product of two matrices More free lessons at: http://www.khanacademy.org/video?v=UdHgWK13x5I

  • 16:14 Lin Alg: Projections onto subspaces with orthonormal bases

    Lin Alg: Projections onto subspaces with orthonormal bases

    319 views / 0 likes - added

    Projections onto subspaces with orthonormal bases More free lessons at: http://www.khanacademy.org/video?v=we829K4NOq8

  • 13:35 Capacitance

    Capacitance

    181 views / 0 likes - added

    Introduction to the capacitance of a two place capacitor More free lessons at: http://www.khanacademy.org/video?v=ngOC4eUQl8Y

  • 08:02 Simplifying Rational Expressions Example 2

    Simplifying Rational Expressions Example 2

    204 views / 0 likes - added

    u15_L1_T1_we2 Simplifying Rational Expressions More free lessons at: http://www.khanacademy.org/video?v=RXMSlFtJlEs

  • 10:08 Earth Formation

    Earth Formation

    367 views / 0 likes - added

    How the Earth is a the byproduct of a local supernova More free lessons at: http://www.khanacademy.org/video?v=VbNXh0GaLYo

  • 12:12 Point distance to plane

    Point distance to plane

    280 views / 0 likes - added

    Distance between a point and a plane in three dimensions More free lessons at: http://www.khanacademy.org/video?v=7rIFO8hct9g

  • 13:55 Nucleophilicity (Nucleophile Strength)

    Nucleophilicity (Nucleophile Strength)

    287 views / 0 likes - added

    Nucleophilicity (Nucleophile Strength) More free lessons at: http://www.khanacademy.org/video?v=Z9Jh-Q59xso

  • 14:01 Exponent Properties Involving Products

    Exponent Properties Involving Products

    333 views / 0 likes - added

    Exponent Properties Involving Products More free lessons at: http://www.khanacademy.org/video?v=zM_p7tfWvLU

  • 13:00 pH of a Weak Base

    pH of a Weak Base

    193 views / 0 likes - added

    pH of .2 M of NH3 (weak base). More free lessons at: http://www.khanacademy.org/video?v=gDJtOIxDu78

  • 09:00 Law of Large Numbers

    Law of Large Numbers

    209 views / 0 likes - added

    Introduction to the law of large numbers More free lessons at: http://www.khanacademy.org/video?v=VpuN8vCQ--M

  • 11:28 Banking 11: A reserve bank

    Banking 11: A reserve bank

    319 views / 0 likes - added

    Introduction to the idea of a reserve bank. More free lessons at: http://www.khanacademy.org/video?v=M-4GWomLbpc

  • 12:10 Exact Equations Example 1

    Exact Equations Example 1

    230 views / 0 likes - added

    First example of solving an exact differential equation. More free lessons at: http://www.khanacademy.org/video?v=Pb04ntcDJcQ

  • 13:04 Linear Algebra: Subspace Projection Matrix Example

    Linear Algebra: Subspace Projection Matrix Example

    411 views / 0 likes - added

    Example of a transformation matrix for a projection onto a subspace More free lessons at: http://www.khanacademy.org/video?v=QTcSBB3uVP0

  • 17:42 2003 AIME II Problem 6

    2003 AIME II Problem 6

    309 views / 0 likes - added

    Finding area of a skewed star More free lessons at: http://www.khanacademy.org/video?v=l9j26EOvTYc

  • 06:18 Cosmological Time Scale 2

    Cosmological Time Scale 2

    220 views / 0 likes - added

    Cosmological Time Scale 2 More free lessons at: http://www.khanacademy.org/video?v=LO7-3MpWijU

  • 10:09 Linear Equations in Standard Form

    Linear Equations in Standard Form

    219 views / 0 likes - added

    Linear Equations in Standard Form More free lessons at: http://www.khanacademy.org/video?v=BaQXFstxCMo

  • 09:23 Exponent Properties Involving Quotients

    Exponent Properties Involving Quotients

    252 views / 0 likes - added

    Exponent Properties Involving Quotients More free lessons at: http://www.khanacademy.org/video?v=AR1uqNbjM5s

  • 18:04 Vapor Pressure

    Vapor Pressure

    253 views / 0 likes - added

    Vapor Pressure, Volatility, and Evaporation More free lessons at: http://www.khanacademy.org/video?v=hA5jddDYcyg

  • 16:46 Conjugate Acids and Bases

    Conjugate Acids and Bases

    190 views / 0 likes - added

    Introduction to conjugate acids and bases More free lessons at: http://www.khanacademy.org/video?v=0LM6wPpypxM

  • 16:59 Alien Abduction Brain Teaser

    Alien Abduction Brain Teaser

    411 views / 0 likes - added

    Saving Earth from becoming a mushroom farm. More free lessons at: http://www.khanacademy.org/video?v=K4pocYXOmTQ

  • 12:07 Bailout 10: Moral Hazard

    Bailout 10: Moral Hazard

    294 views / 0 likes - added

    Alternate plans and moral hazard. More free lessons at: http://www.khanacademy.org/video?v=roap32sTgPk

  • 19:15 Inverse Laplace Examples

    Inverse Laplace Examples

    235 views / 0 likes - added

    Using our toolkit to take some inverse Laplace Transforms More free lessons at: http://www.khanacademy.org/video?v=BbqbvSig6Mc

  • 10:19 Tension (part 2)

    Tension (part 2)

    184 views / 0 likes - added

    A slightly more difficult tension problem. More free lessons at: http://www.khanacademy.org/video?v=zwDJ1wVr7Is

  • 05:20 Fluids (part 11)

    Fluids (part 11)

    176 views / 0 likes - added

    Clarification of the problem in part 10 More free lessons at: http://www.khanacademy.org/video?v=HnfBFeLunk4

  • 10:30 Four Fundamental Forces

    Four Fundamental Forces

    180 views / 0 likes - added

    Gravity, Weak, Electromagnetic and Strong More free lessons at: http://www.khanacademy.org/video?v=FEF6PxWOvsk

  • 04:16 China keeps peg but diversifies holdings

    China keeps peg but diversifies holdings

    219 views / 0 likes - added

    China keeps peg but diversifies holdings More free lessons at: http://www.khanacademy.org/video?v=4aNoZjAhSr8

  • 12:29 Chair and Boat Shapes for Cyclohexane

    Chair and Boat Shapes for Cyclohexane

    196 views / 1 likes - added

    Chair and Boat Shapes for Cyclohexane More free lessons at: http://www.khanacademy.org/video?v=YUEkOBvJSNg

  • 09:13 Equations of Parallel and Perpendicular Lines

    Equations of Parallel and Perpendicular Lines

    202 views / 0 likes - added

    Equations of Parallel and Perpendicular Lines More free lessons at: http://www.khanacademy.org/video?v=9hryH94KFJA

  • 14:57 Circulatory System and the Heart

    Circulatory System and the Heart

    425 views / 0 likes - added

    Introduction to the circulatory system and the heart More free lessons at: http://www.khanacademy.org/video?v=QhiVnFvshZg

  • 14:28 Balancing Chemical Equations

    Balancing Chemical Equations

    213 views / 0 likes - added

    The art of balancing equations in chemistry! More free lessons at: http://www.khanacademy.org/video?v=RnGu3xO2h74

  • 11:59 Matrix Product Associativity

    Matrix Product Associativity

    340 views / 0 likes - added

    Showing that matrix products are associative More free lessons at: http://www.khanacademy.org/video?v=Hhc96U_HvQE

  • 09:03 Linear Algebra: Determinants along other rows/cols

    Linear Algebra: Determinants along other rows/cols

    319 views / 0 likes - added

    Finding the determinant by going along other rows or columns More free lessons at: http://www.khanacademy.org/video?v=nu87kfmwNfU

  • 07:47 Fluids (part 12)

    Fluids (part 12)

    171 views / 0 likes - added

    Complete example of a Bernoulli's Equation exercise. More free lessons at: http://www.khanacademy.org/video?v=xlJYYM5TWoA

  • 10:33 The dot product

    The dot product

    180 views / 0 likes - added

    Introduction to the vector dot product. More free lessons at: http://www.khanacademy.org/video?v=KDHuWxy53uM

  • 11:16 The Business Cycle

    The Business Cycle

    262 views / 1 likes - added

    The business cycle and how it may be driven by emotion More free lessons at: http://www.khanacademy.org/video?v=TXrOpjG4dUs

  • 06:01 Visualizing Taylor Series Approximations

    Visualizing Taylor Series Approximations

    322 views / 0 likes - added

    Using Wolfram Alpha to approximate sin(x) More free lessons at: http://www.khanacademy.org/video?v=8dMLK2Wueaw

  • 12:08 2003 AIME II Problem 8

    2003 AIME II Problem 8

    182 views / 0 likes - added

    Sequence from the product of 2 arithmetic sequences More free lessons at: http://www.khanacademy.org/video?v=ZFN63oTeYzc

  • 04:15 Carbon 14 Dating 2

    Carbon 14 Dating 2

    292 views / 0 likes - added

    Carbon 14 Dating 2 More free lessons at: http://www.khanacademy.org/video?v=4YUtnod-YuE

  • 14:39 Double Newman Diagram for Methcyclohexane

    Double Newman Diagram for Methcyclohexane

    186 views / 0 likes - added

    Double Newman Diagram for Methcyclohexane More free lessons at: http://www.khanacademy.org/video?v=I6LsWSXx8fg

  • 15:01 Graphs of Square Root Functions

    Graphs of Square Root Functions

    308 views / 0 likes - added

    Graphs of Square Root Functions More free lessons at: http://www.khanacademy.org/video?v=outcfkh69U0

  • 14:34 Hemoglobin

    Hemoglobin

    213 views / 0 likes - added

    Hemoglobin and its role in the circulatory system More free lessons at: http://www.khanacademy.org/video?v=LWtXthfG9_M

  • 14:55 Buffers and Hendersen-Hasselbalch

    Buffers and Hendersen-Hasselbalch

    185 views / 0 likes - added

    Buffers and the Hendersen-Hasselbalch equation More free lessons at: http://www.khanacademy.org/video?v=LJmFbcaxDPE

  • 17:48 Dirac Delta Function

    Dirac Delta Function

    230 views / 0 likes - added

    Introduction to the Dirac Delta Function More free lessons at: http://www.khanacademy.org/video?v=4qfdCwys2ew

  • 18:11 Image of a subset under a transformation

    Image of a subset under a transformation

    303 views / 0 likes - added

    Exploring what happens to a subset of the domain under a transformation More free lessons at: http://www.khanacademy.org/video?v=MIAmN5kgp3k

  • 15:32 Linear Algebra: Least Squares Approximation

    Linear Algebra: Least Squares Approximation

    338 views / 0 likes - added

    The least squares approximation for otherwise unsolvable equations More free lessons at: http://www.khanacademy.org/video?v=MC7l96tW8V8

  • 06:52 Exactly Three Heads in Five Flips

    Exactly Three Heads in Five Flips

    324 views / 0 likes - added

    Probability of exactly 3 heads in 5 flips using combinations More free lessons at: http://www.khanacademy.org/video?v=udG9KhNMKJw

  • 10:04 Money Supply- M0 M1 and M2

    Money Supply- M0 M1 and M2

    206 views / 0 likes - added

    Different ways of measuring the money supply More free lessons at: http://www.khanacademy.org/video?v=_LPh72gx6GE

  • 07:12 Gravity for Astronauts in Orbit

    Gravity for Astronauts in Orbit

    274 views / 1 likes - added

    Why do astronauts appear weightless despite being near the Earth? More free lessons at: http://www.khanacademy.org/video?v=oIZV-ixRTcY

  • 09:34 Projectile motion (part 5)

    Projectile motion (part 5)

    180 views / 0 likes - added

    How fast was the ball that you threw upwards? More free lessons at: http://www.khanacademy.org/video?v=dlpmllTx5MY

  • 06:07 Algebra: Linear Equations 2

    Algebra: Linear Equations 2

    190 views / 0 likes - added

    solving equations of the form AX+B=C More free lessons at: http://www.khanacademy.org/video?v=DopnmxeMt-s

  • 04:12 Simplifying Rational Expressions 1

    Simplifying Rational Expressions 1

    225 views / 0 likes - added

    U11_L1_T1_we1 Simplifying Rational Expressions 1 More free lessons at: http://www.khanacademy.org/video?v=XChok8XlF90

  • 08:46 Radical Expressions with Higher Roots

    Radical Expressions with Higher Roots

    262 views / 0 likes - added

    Radical Expressions with Higher Roots More free lessons at: http://www.khanacademy.org/video?v=iX7ivCww2ws

  • 15:04 Stoichiometry: Limiting Reagent

    Stoichiometry: Limiting Reagent

    172 views / 0 likes - added

    Stoichiometry problem where we have a limiting reagent! More free lessons at: http://www.khanacademy.org/video?v=rESzyhPOJ7I

  • 12:22 Bailout 14: Possible Solution

    Bailout 14: Possible Solution

    284 views / 0 likes - added

    A solution that is MUCH fairer that has a MUCH better chance of working! More free lessons at: http://www.khanacademy.org/video?v=BdmI14oSe4g

  • 23:29 Linear Subspaces

    Linear Subspaces

    210 views / 0 likes - added

    Introduction to linear subspaces of Rn More free lessons at: http://www.khanacademy.org/video?v=pMFv6liWK4M

  • 13:08 Null Space 2: Calculating the null space of a matrix

    Null Space 2: Calculating the null space of a matrix

    307 views / 0 likes - added

    Calculating the null space of a matrix More free lessons at: http://www.khanacademy.org/video?v=qvyboGryeA8

  • 18:50 Linear Algebra: Least Squares Examples

    Linear Algebra: Least Squares Examples

    320 views / 0 likes - added

    An example using the least squares solution to an unsolvable system More free lessons at: http://www.khanacademy.org/video?v=8mAZYv5wIcE

  • 11:37 Parabolic Mirrors and Real Images

    Parabolic Mirrors and Real Images

    217 views / 1 likes - added

    Parabolic Mirrors and Real Images More free lessons at: http://www.khanacademy.org/video?v=8X1AS9qD5AQ

  • 19:01 Cuban Missile Crisis

    Cuban Missile Crisis

    243 views / 0 likes - added

    Overview of the Cuban Missile Crisis More free lessons at: http://www.khanacademy.org/video?v=VO40SpSBjbc

  • 16:39 French Invasion of Russia

    French Invasion of Russia

    208 views / 0 likes - added

    Napoleon's disastrous invasion of Russia More free lessons at: http://www.khanacademy.org/video?v=F_ySQvjtAxQ

  • 11:59 Parsing Gross Domestic Product

    Parsing Gross Domestic Product

    183 views / 0 likes - added

    Understanding what GDP does and doesn't measure. More free lessons at: http://www.khanacademy.org/video?v=zh8XASZxo1Q

  • 12:54 White and Black Dwarfs

    White and Black Dwarfs

    244 views / 1 likes - added

    White and Black Dwarfs More free lessons at: http://www.khanacademy.org/video?v=EdYyuUUY-nc

  • 11:03 Scale of the Large

    Scale of the Large

    208 views / 0 likes - added

    Attempting to comprehend the scale of the large More free lessons at: http://www.khanacademy.org/video?v=5FEjrStgcF8

  • 14:13 Secondary Active Transport in the Nephron

    Secondary Active Transport in the Nephron

    169 views / 0 likes - added

    Secondary Active Transport in the Nephron More free lessons at: http://www.khanacademy.org/video?v=czY5nyvZ7cU

  • 02:36 Review of China US currency situation

    Review of China US currency situation

    285 views / 0 likes - added

    Review of China US currency situation More free lessons at: http://www.khanacademy.org/video?v=DtlFQ_nNaQM

  • 13:57 Linear Algebra:  Gram-Schmidt example with 3 basis vectors

    Linear Algebra: Gram-Schmidt example with 3 basis vectors

    364 views / 0 likes - added

    Gram-Schmidt example with 3 basis vectors More free lessons at: http://www.khanacademy.org/video?v=ZRRG386v6DI

  • 10:36 2-dimensional momentum problem

    2-dimensional momentum problem

    190 views / 0 likes - added

    An example of conservation of momentum in two dimensions. More free lessons at: http://www.khanacademy.org/video?v=CFygKiTB-4A

  • 13:03 Introduction to Waves

    Introduction to Waves

    197 views / 0 likes - added

    Introduction to transverse and longitudinal waves More free lessons at: http://www.khanacademy.org/video?v=c38H6UKt3_I

  • 13:03 Detectable Civilizations in our Galaxy 1

    Detectable Civilizations in our Galaxy 1

    183 views / 0 likes - added

    A framework for thinking about how many detectable civilizations are out there. More free lessons at: http://www.khanacademy.org/video?v=YYEgq1bweN4

  • 03:53 Simplifying Rational Expressions 3

    Simplifying Rational Expressions 3

    162 views / 0 likes - added

    U11_L1_T1_we3 Simplifying Rational Expressions 3 More free lessons at: http://www.khanacademy.org/video?v=ey_b3aPsRl8

  • 13:29 Natural Selection and the Owl Butterfly

    Natural Selection and the Owl Butterfly

    328 views / 0 likes - added

    How the "Owl Butterfly" may have gotten the spot on its wings. More free lessons at: http://www.khanacademy.org/video?v=dR_BFmDMRaI

  • 14:51 Reactions in Equilibrium

    Reactions in Equilibrium

    219 views / 0 likes - added

    Equilibrium reactions and constants. More free lessons at: http://www.khanacademy.org/video?v=CGJjjm7-DJ4

  • 14:47 Introduction to the Price-to-Earnings Ratio

    Introduction to the Price-to-Earnings Ratio

    197 views / 0 likes - added

    Price to Earnings Ration (or P/E ratio). More free lessons at: http://www.khanacademy.org/video?v=cppxO67e6eo

  • 12:17 Statistics: Alternate Variance Formulas

    Statistics: Alternate Variance Formulas

    234 views / 0 likes - added

    Playing with the formula for variance of a population. More free lessons at: http://www.khanacademy.org/video?v=sRVGcYGjUk8

  • 10:45 Laplace Transform 3 (L{sin(at)})

    Laplace Transform 3 (L{sin(at)})

    238 views / 0 likes - added

    Laplace Transform of sin(at) (part 1) More free lessons at: http://www.khanacademy.org/video?v=gMcs6RF_LrQ

  • 10:40 Column Space of a Matrix

    Column Space of a Matrix

    318 views / 0 likes - added

    Introduction to the column space of a matrix More free lessons at: http://www.khanacademy.org/video?v=st6D5OdFV9M

  • 09:32 Surjective (onto) and Injective (one-to-one) functions

    Surjective (onto) and Injective (one-to-one) functions

    307 views / 0 likes - added

    Introduction to surjective and injective functions More free lessons at: http://www.khanacademy.org/video?v=xKNX8BUWR0g

  • 16:08 Linear Algebra: Coordinates with Respect to a Basis

    Linear Algebra: Coordinates with Respect to a Basis

    329 views / 0 likes - added

    Understanding alternate coordinate systems More free lessons at: http://www.khanacademy.org/video?v=uvgru6FcyxU

  • 09:33 2-dimensional momentum problem (part 2)

    2-dimensional momentum problem (part 2)

    194 views / 0 likes - added

    We finish the 2-dimensional momentum problem More free lessons at: http://www.khanacademy.org/video?v=leudxqivIJI

  • 10:01 Cross Product and Torque

    Cross Product and Torque

    285 views / 0 likes - added

    The cross product and the direction of torque. More free lessons at: http://www.khanacademy.org/video?v=s38l6nmTrvM

  • 08:18 Scale of Distance to Closest Stars

    Scale of Distance to Closest Stars

    234 views / 0 likes - added

    Scale of Distance to Closest Stars More free lessons at: http://www.khanacademy.org/video?v=jEeJkkMXt6c

  • 07:04 Star Field and Nebula Images

    Star Field and Nebula Images

    212 views / 0 likes - added

    Star Field and Nebula Images More free lessons at: http://www.khanacademy.org/video?v=w3IKEa_GOYs

  • 11:10 Extraneous Solutions to Radical Equations

    Extraneous Solutions to Radical Equations

    271 views / 0 likes - added

    Extraneous Solutions to Radical Equations More free lessons at: http://www.khanacademy.org/video?v=711pdW8TbbY

  • 17:16 Electron Transport Chain

    Electron Transport Chain

    225 views / 0 likes - added

    Overview of the Electron Transport Chain More free lessons at: http://www.khanacademy.org/video?v=mfgCcFXUZRk

  • 21:05 Introduction to the atom

    Introduction to the atom

    203 views / 0 likes - added

    The atom, proton, neutron and electron More free lessons at: http://www.khanacademy.org/video?v=1xSQlwWGT8M

  • 15:34 P/E Discussion

    P/E Discussion

    188 views / 0 likes - added

    Discussion of the price-to-earnings ratio More free lessons at: http://www.khanacademy.org/video?v=V-rko8jgJ9o

  • 12:16 3-D Path Counting Brain Teaser

    3-D Path Counting Brain Teaser

    360 views / 0 likes - added

    Extending the path counting to three dimensions More free lessons at: http://www.khanacademy.org/video?v=wRxzDOloS3o

  • 05:57 ck12.org: More Empirical Rule and Z-score practice

    ck12.org: More Empirical Rule and Z-score practice

    251 views / 0 likes - added

    More Empirical Rule and Z-score practice More free lessons at: http://www.khanacademy.org/video?v=itQEwESWDKg

  • 09:04 Small Sample Hypothesis Test

    Small Sample Hypothesis Test

    311 views / 0 likes - added

    Small Sample Hypothesis Test More free lessons at: http://www.khanacademy.org/video?v=D2sMsmL0ScQ

  • 09:14 Laplace Transform 4

    Laplace Transform 4

    218 views / 0 likes - added

    Part 2 of getting the Laplace transform of sin(at) More free lessons at: http://www.khanacademy.org/video?v=-cApVwKR1Ps

  • 06:31 Relating invertibility to being onto and one-to-one

    Relating invertibility to being onto and one-to-one

    302 views / 0 likes - added

    Relating invertibility to being onto (surjective) and one-to-one (injective) More free lessons at: http://www.khanacademy.org/video?v=QIU1daMN8fw

  • 08:19 Linear Algebra: Duplicate Row Determinant

    Linear Algebra: Duplicate Row Determinant

    357 views / 0 likes - added

    Determinant of a matrix with duplicate rows More free lessons at: http://www.khanacademy.org/video?v=gYv8sttBIqs

  • 09:19 Linear Algebra: Proof of formula for determining Eigenvalues

    Linear Algebra: Proof of formula for determining Eigenvalues

    359 views / 0 likes - added

    Proof of formula for determining Eigenvalues More free lessons at: http://www.khanacademy.org/video?v=rfm0wQObxjk

  • 09:24 Relationship between angular velocity and speed

    Relationship between angular velocity and speed

    235 views / 0 likes - added

    How angular velocity relates to speed More free lessons at: http://www.khanacademy.org/video?v=zAx61CO5mDw

  • 08:02 Thermodynamics (part 5)

    Thermodynamics (part 5)

    153 views / 0 likes - added

    Example problem involving PV=nRT More free lessons at: http://www.khanacademy.org/video?v=UekR9J31a2o

  • 08:10 Depreciation and Opportunity Cost of Capital

    Depreciation and Opportunity Cost of Capital

    222 views / 0 likes - added

    How to account for things when you own the building instead of renting it More free lessons at: http://www.khanacademy.org/video?v=ckBKDrKVIMU

  • 09:21 Prisoners' Dilemma and Nash Equilibrium

    Prisoners' Dilemma and Nash Equilibrium

    205 views / 0 likes - added

    Why two not-so-loyal criminals would want to snitch each other out More free lessons at: http://www.khanacademy.org/video?v=UkXI-zPcDIM

  • 06:39 Consumption Function Basics

    Consumption Function Basics

    177 views / 0 likes - added

    The basic idea of a consumption function More free lessons at: http://www.khanacademy.org/video?v=o5iot_ZsoV0

  • 08:42 Introduction to bonds

    Introduction to bonds

    223 views / 0 likes - added

    What it means to buy a bond More free lessons at: http://www.khanacademy.org/video?v=Qh-M3_L4xYk

  • 07:18 Detectable Civilizations in our Galaxy 3

    Detectable Civilizations in our Galaxy 3

    237 views / 0 likes - added

    Reconciling with the traditional Drake Equation More free lessons at: http://www.khanacademy.org/video?v=LRmwUsxNSL0

  • 05:46 Ideal Gas Equation Example 3

    Ideal Gas Equation Example 3

    192 views / 0 likes - added

    Figuring out the mass of Oxygen we have. More free lessons at: http://www.khanacademy.org/video?v=69V-60sga3M

  • 16:45 Empirical and Molecular Formulas from Stoichiometry

    Empirical and Molecular Formulas from Stoichiometry

    228 views / 0 likes - added

    Empirical and Molecular Formulas from Stoichiometry More free lessons at: http://www.khanacademy.org/video?v=FycJ8X67xEU

  • 04:17 Data on Chinese US Balance of Payments

    Data on Chinese US Balance of Payments

    307 views / 0 likes - added

    Data on Chinese US Balance of Payments More free lessons at: http://www.khanacademy.org/video?v=iNemmT1hnzA

  • 10:57 Credit Default Swaps

    Credit Default Swaps

    272 views / 0 likes - added

    Introduction to credit default swaps More free lessons at: http://www.khanacademy.org/video?v=a1lVOO9Y080

  • 14:15 Inverse Matrix (part 1)

    Inverse Matrix (part 1)

    307 views / 0 likes - added

    Taking the inverse of a 2x2 matrix More free lessons at: http://www.khanacademy.org/video?v=iUQR0enP7RQ

  • 16:56 Proof of the Cauchy-Schwarz Inequality

    Proof of the Cauchy-Schwarz Inequality

    333 views / 0 likes - added

    Proof of the Cauchy-Schwarz Inequality More free lessons at: http://www.khanacademy.org/video?v=r2PogGDl8_U

  • 10:25 Linear Algebra: Determinant after row operations

    Linear Algebra: Determinant after row operations

    314 views / 0 likes - added

    What happens to the determinant when we perform a row operation More free lessons at: http://www.khanacademy.org/video?v=kpG7xySkivg

  • 05:39 Linear Algebra: Example solving for the eigenvalues of a 2x2 matrix

    Linear Algebra: Example solving for the eigenvalues of a 2x2 matrix

    359 views / 0 likes - added

    Example solving for the eigenvalues of a 2x2 matrix More free lessons at: http://www.khanacademy.org/video?v=pZ6mMVEE89g

  • 10:08 Probability (part 5)

    Probability (part 5)

    348 views / 0 likes - added

    Probability of getting a certain number roll in Monopoly More free lessons at: http://www.khanacademy.org/video?v=2XToWi9j0Tk

  • 11:49 Normal Force in an Elevator

    Normal Force in an Elevator

    240 views / 0 likes - added

    How the normal force changes when an elevator accelerates More free lessons at: http://www.khanacademy.org/video?v=hoRsHNSrMpc

  • 05:56 Normal and Inferior Goods

    Normal and Inferior Goods

    230 views / 0 likes - added

    How the demand for some goods could actually go down if incomes go up More free lessons at: http://www.khanacademy.org/video?v=wYuAwm-5-Bk

  • 06:31 More on Nash Equilibrium

    More on Nash Equilibrium

    216 views / 0 likes - added

    Looking more closely at the definition of Nash Equilibrium More free lessons at: http://www.khanacademy.org/video?v=ewu_7Dmj_18

  • 09:26 Stellar Parallax

    Stellar Parallax

    177 views / 0 likes - added

    Another version of the stellar parallax introduction More free lessons at: http://www.khanacademy.org/video?v=omvNINaRdxg

  • 10:26 Organic Chemistry Naming Examples 2

    Organic Chemistry Naming Examples 2

    202 views / 0 likes - added

    Organic Chemistry Naming Examples 2 More free lessons at: http://www.khanacademy.org/video?v=CJRQ8gOjq4E

  • 10:36 Special Products of Binomials

    Special Products of Binomials

    192 views / 0 likes - added

    Special Products of Binomials More free lessons at: http://www.khanacademy.org/video?v=bFtjG45-Udk

  • 17:41 Example of Finding Reactant Empirical Formula

    Example of Finding Reactant Empirical Formula

    317 views / 0 likes - added

    Example of Finding Reactant Empirical Formula More free lessons at: http://www.khanacademy.org/video?v=66ziUq6vRko

  • 05:59 2nd Order Linear Homogeneous Differential Equations 3

    2nd Order Linear Homogeneous Differential Equations 3

    244 views / 0 likes - added

    Let's use some initial conditions to solve for the particular solution More free lessons at: http://www.khanacademy.org/video?v=UyCwAFQt4v0

  • 09:46 Laplace Transform 6

    Laplace Transform 6

    223 views / 0 likes - added

    Laplace transform of cosine and polynomials! More free lessons at: http://www.khanacademy.org/video?v=fyJkXBvcA2Q

  • 16:45 Inverting matrices (part 2)

    Inverting matrices (part 2)

    224 views / 0 likes - added

    Inverting a 3x3 matrix More free lessons at: http://www.khanacademy.org/video?v=S4n-tQZnU6o

  • 08:07 Linear Algebra: Upper Triangular Determinant

    Linear Algebra: Upper Triangular Determinant

    342 views / 0 likes - added

    The determinant of an upper triangular matrix More free lessons at: http://www.khanacademy.org/video?v=VX7K8iqoiRc

  • 05:19 Inferior Goods Clarification

    Inferior Goods Clarification

    203 views / 0 likes - added

    More clarification on inferior and normal goods More free lessons at: http://www.khanacademy.org/video?v=TAhRoJB34nw

  • 16:36 2003 AIME II Problem 11.avi

    2003 AIME II Problem 11.avi

    308 views / 0 likes - added

    A little trigonometry to figure out the area of a triangle More free lessons at: http://www.khanacademy.org/video?v=smtrrefmC40

  • 10:18 Electron Configurations 2

    Electron Configurations 2

    178 views / 0 likes - added

    Figuring out configurations for the d-block elements More free lessons at: http://www.khanacademy.org/video?v=YURReI6OJsg

  • 03:26 Floating Exchange Effect on China

    Floating Exchange Effect on China

    292 views / 0 likes - added

    Floating Exchange Effect on China More free lessons at: http://www.khanacademy.org/video?v=vrGNXAGmfCM

  • 10:47 Variance of Differences of Random Variables

    Variance of Differences of Random Variables

    444 views / 0 likes - added

    Variance of Differences of Random Variables More free lessons at: http://www.khanacademy.org/video?v=rLdoKZ7w0xI

  • 10:33 Bailout 3: Book value vs. market value

    Bailout 3: Book value vs. market value

    319 views / 0 likes - added

    What it means when the market value of a stock is different from its book value. More free lessons at: http://www.khanacademy.org/video?v=TUOQZjotyAQ

  • 25:11 Defining the angle between vectors

    Defining the angle between vectors

    283 views / 0 likes - added

    Introducing the idea of an angle between two vectors More free lessons at: http://www.khanacademy.org/video?v=5AWob_z74Ks

  • 13:59 Dimension of the Null Space or Nullity

    Dimension of the Null Space or Nullity

    384 views / 0 likes - added

    Dimension of the Null Space or Nullity More free lessons at: http://www.khanacademy.org/video?v=abYAUqs_n6I

  • 14:08 Linear Algebra: Eigenvalues of a 3x3 matrix

    Linear Algebra: Eigenvalues of a 3x3 matrix

    336 views / 0 likes - added

    Determining the eigenvalues of a 3x3 matrix More free lessons at: http://www.khanacademy.org/video?v=11dNghWC4HI

  • 07:35 When the source and the wave move at the same velocity

    When the source and the wave move at the same velocity

    213 views / 0 likes - added

    When the source and the wave move at the same velocity More free lessons at: http://www.khanacademy.org/video?v=4Xgk3vusxT8

  • 02:09 Frequency Stability

    Frequency Stability

    242 views / 0 likes - added

    Can humans generate truly random sequences More free lessons at: http://www.khanacademy.org/video?v=vVXbgbMp0oY

  • 02:31 Adding subtracting mixed numbers 1 (ex 2)

    Adding subtracting mixed numbers 1 (ex 2)

    345 views / 0 likes - added

    Adding subtracting mixed numbers 1 (ex 2) More free lessons at: http://www.khanacademy.org/video?v=_btQus9HV_I

  • 06:08 2003 AIME II Problem 1

    2003 AIME II Problem 1

    237 views / 0 likes - added

    2003 AIME II Problem 1 More free lessons at: http://www.khanacademy.org/video?v=JPQ8cfOsYxo

  • 02:22 Stellar Parallax Clarification

    Stellar Parallax Clarification

    179 views / 0 likes - added

    Stellar Parallax Clarification More free lessons at: http://www.khanacademy.org/video?v=6FP-hLuAlr4

  • 12:04 Currency Exchange Introduction

    Currency Exchange Introduction

    246 views / 0 likes - added

    Introduction to how exchange rates can fluctuate More free lessons at: http://www.khanacademy.org/video?v=itoNb1lb5hY

  • 10:04 Organic Chemistry Naming Examples 5

    Organic Chemistry Naming Examples 5

    205 views / 0 likes - added

    Organic Chemistry Naming Examples 5 More free lessons at: http://www.khanacademy.org/video?v=6BR0Q5e74bs

  • 11:51 Resonance

    Resonance

    171 views / 0 likes - added

    Resonance in benzene and the carbonate ion More free lessons at: http://www.khanacademy.org/video?v=6XOm3Km7r30


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