The moment of inertia of an object is a property that describes how difficult it is to rotate the object about an axis. Rotational inertia accounts for the stability of gyroscopes and bike-riders, and has applications for navigation of planes and figure skaters performing lightning-fast spins. Richard Garriott experiments with spinning a deck of playing cards to demonstrate both stable rotation and tumbling rotation.
Video Rating: / 5

2013-03-31 - Canadian astronaut and Commander of Expedition 35 answers a question about how astronauts brush their teeth in space. You might be surprised by what he reveals!

Credits: Canadian Space Agency and NASA

Expedition 34-35 Web page:

Hygiene in space Web page:

Find out more about this video:
Video Rating: / 5

The total amount of momentum in a closed system is constant. Some examples of closed systems include: marbles colliding or two bumper cars bouncing off each other. Momentum is the mass of an object multiplied by its speed. If two cars collide, the momentum of the system (car one plus car two) is the same after collision as it was before collision. Each car might have a different speed after colliding, but the total momentum is the same, it does not increase or decrease. This is known as conservation of momentum.
Video Rating: / 5

Richard Garriott demonstrates how magnets act in space using two magnets to see if, in microgravity, they interact with each other the same way they do on the surface of the Earth; if magnetic forces act at a distance; and where do they point. Magnetism is one of the fundamental forces. A magnet is a material or an object that produces a magnetic field that extends out from a magnet and can exert a force at a distance. A compass uses a magnet that can spin easily and can be used to determine directions. The Earth has a magnetic field that caused it to act like a giant magnet.
Video Rating: / 5

Latest Comments



You Count


Twitter Stuff