| study for study sake
Study for the sake of study cannot be rewarding for there are many things that can be studied. Study with a purpose can be rewarding. Purpose can be the same as solving a challenging problem like finding a new source of energy. The reward is to be the first to find the solutions. Maybe not all of the solutions but some particular solutions.
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Time independence: [∂E(g)]²=[∂F(a)×∂r(a)]·[∂F(b)×∂r(b)] and Mass independence: ¶a(t)·¶r(t)=c²
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