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Work and Energy: Conservation of Energy

Related Article: Learn more about relativity.

The law of conservation of energy states that energy can change form, but the total amount of energy stays the same.

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MythBusters: Bullets Fired Up Uncut (4:15)

Check out unseen footage of the MythBusters testing the "Bullets Fired Up" myth with paint balls.

MythBusters: Walking on Water Uncut (3:00)

Though they have made multiple attempts with various devices, The MythBusters have never been able to walk on water. Will Adam's new apparatus, the Aqua Skipper, help him stay afloat?

2057: Time Travel (2:44)

Time travel is a topic that has fascinated people for years. Learn more about the idea of time travel in this video from HowStuffWorks.

Physics: Primal Forces (2:53)

Learn about the primal forces of the universe-gravity, electromagnetic, the Strong and Weak nuclear force.

100 Greatest Discoveries: Physics (2:53)

In this video clip, physicists study the primal forces of the universe-gravity, electromagnetics and the strong and weak nuclear force. Learn more about the wonderful world of physics in this video from Discovery.

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100 Greatest Discoveries: Physics (2:53)

In this video clip, physicists study the primal forces of the universe-gravity, electromagnetics and the strong and weak nuclear force. Learn more about the wonderful world of physics in this video from Discovery.