Three springs are arranged as shown. The three springs have spring constants k = 49.5, k2 = 65.1, and k = 90.5. When a mass is placed on the end of the combined springs and the springs are stretched, what is the effective spring constant of the combined springs? k, wwwwwwm k, effective spring constant: N/m Three other springs are arranged as shown with spring constants ką = 80.7, k, = 55.5, and kg 113. When the springs are stretched, what is the effective spring constant of the combined springs? www k5 effective spring constant: N/m

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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.