A swinging pirate ship ride at a theme park. Kinetic energy is transferred into gravitational potential energy. Doing 'work' is the scientific way of saying that energy has been transferred. For ...
April 10, 2009 The United States has about 250 million registered vehicles, which adds up to a lot of pollution and burning of fossil fuels. New Energy Technologies, Inc. prefers to look at it another ...
Source: NOVA: "Secrets of Lost Empires II: Medieval Siege" This media asset was adapted from NOVA: "Secrets of Lost Empires II: Medieval Siege" In medieval times, one of the most fearsome weapons was ...
We walk here, we walk there, we walk everywhere. Maybe you’re headed to work or to lunch in a busy city. You’re expending energy, and the exercise is good for you. But what if, on top of that, we ...
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