Two pulse with both amplitudes of +3 were about to meet at the center. (a) What type of wave interface occur when the pulses met? (b) What will be the total amplitude of the pulse produce by the interference of the two pulses? (c) After the interference, will both pulses move the same velocity as they were before?

A string of 1 m length clamped at both ends is plucked in the middle to generate a standing wave. Take the frequency of the first harmonic to be 10 Hz and the amplitude of the oscillations to be 2 cm. Consider the motion to be a simple harmonic one where appropriate.  Calculate the value of maximum velocity of up and down motion of the string at midpoint. Provide your anwser in m/s.

At an outdoor music event, a dB meter records 130 dB when placed 2.25 m in front of aloudspeaker near the stage. A) What was the power output of the speaker, assuminguniform spherical spreading of the sound and neglecting any absorption, reflection andinterference of the sound that may occur? B) How far away would you need to be forthe sound level to be 80 dB?

If wave of wavelength=100m in deep water is observed from a moving ship with constant speed of 7m/s. When the wave propagates in the opposite direction of the ship, find the corresponding encounter frequency observed from the ship.