Q. A gun shoots bullets that leave the muzzle with a speed of 205m/s. If a bullet is to hit a target 151m away at the level of the muzzle, the gun must be aimed at a point above target.
How far above the target is this point?
Q. Two loudspeakers are placed 3 meters apart. They emit 440Hz sounds in phase. A microphone is placed 3.2m distant from a point midway between the two speakers and an intensity maximum is recorded at that point. How far should the microphone be move to the right to find out the first intensity minimum?