You hold two sheets of identical blue paper over your head at the same height. You drop both sheets of paper at the same time and note your observations as to the time and way the two sheets of paper fall through the air. Next, you ball up one sheet of paper and leave the other sheet exactly as it was in the first trial. You hold both pieces of paper over your head at the same height. You drop both pieces of paper at the same time and note your observations as to the time and way the two pieces of paper fall through the air for this second trial. Experimental Desian

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Relativistic Energy and Momentum

According to classical physics, time flow is the same for every observer. But according to einstein's theory, time flow is different for different observers. The idea that time flow is not the same for all may sound strange because we may not experience this effect in everyday life. This effect is only observed when an object moves with some velocity comparable to the velocity of light. This velocity is termed relativistic velocity.