Q1. A spring with spring constant 14 hangs from the ceiling. A ball is attached to the spring and allowed to come to rest. It is then pulled down 3.0 and released. The ball makes 17 oscillations in 16 seconds. What is it the mass of ball?
Q2. Two loudspeakers are placed on a wall 1.80 m apart. A listener stands 2.84 m from the wall directly in front of one of the speakers. The speakers are being driven by a single oscillator at a frequency of 254 Hz. What is the phase difference between the two waves then they reach observer? Take the speed of sound as 343 m/s.