A machine gun is mounted on a tank moving at a speed of 20 ms1 towards a target with the gun pointing in the direction of motion of the tank. The muzzle speed of the bullet equals the speed of sound = 340 ms1. If, at the time of firing, the target is 500 m away from the tank, then
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The sound arrives at the target earlier than the bullet because the speed of sound is faster than the speed of bullet.
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