How to Build your own PC Computer

Physics of Martial Arts - Kinematics

Lyrebird - Jungle Bird Mimics Bird and Human Sounds

From most macro to most micro

The video was made using this web site:

Secret Worlds: The Universe Within

It says: "View the Milky Way at 10 million light years from the Earth. Then move through space towards the Earth in successive orders of magnitude until you reach a tall oak tree just outside the buildings of the National High Magnetic Field Laboratory in Tallahassee, Florida. After that, begin to move from the actual size of a leaf into a microscopic world that reveals leaf cell walls, the cell nucleus, chromatin, DNA and finally, into the subatomic universe of electrons and protons."

Excellent trampoline stunt

Simulating physics in video games

In the most modern video games, software engineers are doing a lot of work to simulate physics. This lets the games look and feel more and more realistic. You can see, for example, how physics makes this soft-body simulation look realistic:



Here, a physics simulation makes trucks look very realistic:



But right now there are limits, as this video shows us:



The description that comes with the video says that: "a rigid car frame sitting on wheels and ball bearings is shown in this example. A multittude of forces are constantly pushing on the ball bearings and the ball races. These forces are very small, and the physics engine has a hard time accurately simulating the forces and positions of the objects, which results in small, unnatural movements. These movements are not dampened, but instead compound together into violent shaking and finally a powerful explosion that blows the ball bearings and the entire car apart in a shower of force/position errors. Created using Fraps and the 3D environment Second Life, wich uses the Havok physics engine."

Making of a Sukhoi Su-30 Flanker

Also

Building a bear out of huge rocks

How to build a giant teddy bear:

Tim Hawkinson's "Bear"

Rocket explosion

How they built the pyramids

Very nice NOVA video about the great pyramid in Egypt and how it was built:

This old pyramid

Very cool model airplane with camera

X Prize Cup

Lots more videos from this event are available at:

http://www.space.com/xprizecup/video/

Science magic

Dominoes in Half-Life2

This video is interesting because it is done using the "physics engine" inside a popular video game called Half-Life2. It is only recently that video games have had enough physics realism that something like this is possible. The creators have taken different objects from the game and arranged them in a unique sequence.



Also funny...

Hybrid cars

Colorful Water Electrolysis

Bromothymol blue turns yellow when in acidic conditions. As the oxygen bubbles off of the right-hand electrode, it leaves behind some hydrogen ions and they make the solution acidic.

Mars rover mission simulation

Cups and ball trick

The Hubble Deep Field: The Most Important Image Ever Taken

The power of a jet engine

Twig man

Drawing the human figure

These are long, but wow can you learn a lot...

Here is Lesson 1:



Lesson 38 was particularly interesting. At the beginning he has a cube. By the end he has a realistic pelvis:

ASIMO

Training a cat

Zero gravity classroom

Fractal zoom

For information on fractals and an explanation of what you are looking at, see: Fractals, Introduction to the mandelbrot set, Mandelbrot set, Fractals and The Mandelbrot/Julia Set Applet (just drag a box on the mandelbrot set and click "Zoom to box").

Creating 3-D furniture with pen strokes in the air

Flight patterns in the U.S.

Rubik's Cube Blindfolded in 18 secs!

Robots

Compass and sundial

Rotting pumpkin