If a given mass undergoes a process in which that mass generates energy, what can we say about whether mass is conserved or not in light of E=mc²? O Mass is absolutely conserved because mass cannot be created or destroyed. O Mass is absolutely not conserved because an appreciable part is converted to energy. O We can assume that mass is conserved because the amount of mass converted to the energy is extremely small, and hence negligible O Mass is not conserved because a big part is converted to energy. O None of the above is reasonable.

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Proper Length

The theory of special relativity explains the connection between space and time to objects that move in a straight line at a constant speed. The objects move at the speed of light. When an object approaches light speed, its mass is endless and cannot move faster than light. The most crucial postulate of Einstein's special relativity is that the laws of nature do not change in each frame of reference.