Physics, 05.12.2020 23:10, 1937

You need to know the height of a room, but you have no tape measure. You fasten one end of a string to the ceiling of the room, and tie a small rock at the other end so it almost touches the floor. You start this simple pendulum swinging slightly, and measure its period, which is 3.35 seconds. How tall is the room?

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You need to know the height of a room, but you have no tape measure. You fasten one end of a string...