What does it exactly mean when we say that energy has moved from one body to another, what has physically been transferred? The concept of energy is very confusing, please help.
And if gravitational potential energy is stored in a body, does the body's mass increase according to $E=mc^2$?
Saturday, 1 November 2014
Energy and its physical significance
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I want to know what happens to the space a black hole crosses over as our galaxy travels through space.
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