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A bullet fired horizontally over level ground hits the ground in 0.5 second. If it had been fired with twice the speed it would have hit the ground in
Q1: A pair of air pucks on an
Q1: Surface tension is a direct result of<br>A)viscosity.<br>B)Archimedes'
Q16: About what percentage of molecules in the
Q20: Escape speed from Mars is<br>A)about the same
Q31: According to Kepler, the speed of a
Q34: One liter of water has a mass
Q43: Compared with a force, a torque involves<br>A)rotation.<br>B)leverage.<br>C)distance
Q61: Which pulls on the oceans of Earth
Q62: A sandbag motionless in outer space is
Q93: Escape speed from the Moon is<br>A)about the