The diagram shows a horizontal spring attached to a block. The block's equilibrium position is at C, and the block oscillates between the points A and E with no friction from the floor. When the block is at E, which of the following statements is true? Select all apply. E D C B A the block's magnitude of the acceleration is maximum the net force on the block is zero the block's speed is maximum the block's acceleration is zero the magnitude of the net force on the block is maximum the block's speed is zero

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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.