Abody of mass 2 kg is moving in the positive x-direction with a speed of 4 m/s collides head on with an another body of mass 3 kg moving in the negative x-direction with a speed of 1 m/s . during collision a loud sound is heard and they both start moving together . the sound energy cannot be greater than :
a) 12 j
b) 14 j
c) 15 j
d) 17.5 j

Which statement best describes the superposition principle? a.) if two in-phase waves arrive simultaneously at a point, their amplitudes add up b.) if two out-of-phase waves arrive simultaneously at a point, their amplitudes add up c.) if two in-phase waves arrive at a point one after another, their amplitudes add up d.) if two out-of-phase waves arrive at a point one after another, their amplitudes adds up