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  • 02:11 Popular How Do Submarines Dive And Surface?

    How Do Submarines Dive And Surface?

    701 views / 1 likes - added

    Modern submarines can dive up to 240 meters below the surface of the water. When the crew is ready to submerge, external ballast tanks that are normally filled with air, open to receive water. This makes the ship slightly negatively buoyant. #ImpossibleEn

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  • 03:24 Popular Diving bear--Cartesian diver and submarine-like behavior /// Homemade Science with Bruce Yeany

    Diving bear--Cartesian diver and submarine-like behavior /// Homemade Science with Bruce Yeany

    884 views / 0 likes - added

    The diving bear is a simple and fun experiment that is easy to build and use. It's behavior is similar to a cartesian diver and the sinking or floating of a submarine. It can help demonstrate concepts such as buoyancy (Archimede's principle), Pascal's pri

  • 21:03 How To Make A Crystal Radio - No Batteries

    How To Make A Crystal Radio - No Batteries

    416 views / 0 likes - added

    How to make a robust crystal radio. DIY step by step. No special tools or skills needed. Most parts can be had from recycled things. The purchased parts run about $3. Good during power failures, when batteries are not available, for prepping and similar.

  • 13:30 Building and Testing a Lego-powered Submarine

    Building and Testing a Lego-powered Submarine

    600 views / 0 likes - added

    Making a radio-controlled submarine with Lego and other materials. At the end I test it in a lake. Enjoy! The submarine specs: Length: 22 cm (8.7 in) Displacement: 1880 grams (66 oz) Speed: 0.2 knots (10 cm/s) Operating depth: 3 m (10 ft) - ballast tank w

  • 08:00 24 ft Crawler Crane made entirely of LEGO really works!

    24 ft Crawler Crane made entirely of LEGO really works!

    546 views / 0 likes - added

    See video of 7.3m configuration: https://youtu.be/JJyhYmm1Yhw Remote controlled model of Liebherr LR 11000. 1:24 scale, ~27 kg weight, 4 EV3 bricks, 9 motors, 7 light sensors, 1 touch sensor. Gallery: https://flic.kr/s/aHsktA4fiA Videos of other cranes fr

  • 05:40 Why Are There Stones Along Railway Tracks?

    Why Are There Stones Along Railway Tracks?

    142 views / 0 likes - added

    The crushed stones that line railroad tracks are collectively called track ballast. More specifically, the track ballast constitutes the trackbed upon which sleepers or railroad ties are laid. As you may have seen, these stones are packed below, between a

  • 07:27 Building a Lego-powered Submarine 4.0 - automatic depth control

    Building a Lego-powered Submarine 4.0 - automatic depth control

    293 views / 0 likes - added

    This radio-controlled submarine can maintain a steady depth or a certain distance from the bottom. It is equipped with a pressure sensor and a laser distance sensor. Raspberry Pi and PID control are used for automation. Tested in a swimming pool and a sma


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