Created by StemPy LabA man walks at on level ground, and to him the rain seems to fall vertically. When he doubles his walking speed in the same direction, the rain seems to come at to the vertical, towards his face. The actual velocity of the rain is
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← Three constants of nature are Planck's constant h, the speed of light c and the gravitational constant G. They can be combined into a quantity with the dimensions of length, called the Planck length. Which combination has the dimensions of length?Two blocks of masses 3 kg and 5 kg hang from the two ends of a light string that passes over a light frictionless pulley. The pulley hangs from a spring balance fixed to the ceiling, as shown in the figure. The blocks are released and move. Taking g = 10 m/s², the reading of the spring balance while the blocks move is →
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