Two balls are suspended on parallel threads of the same length so that they touch contact each other. The mass of the first ball is

m1 = 0.2kg

and that of the second

m2 =100g

. The first ball is

deflected so that its centre of gravity rises to a height of

4.5cm

and is then released. At what

height will the balls rise to after the collision if: (i) the impact is elastic, (ii) the impact is

inelastic?

Two loudspeakers, 5.5 m apart and facing each other, play identical sounds of the same frequency. you stand halfway between them, where there is a maximum of sound intensity. moving from this point toward one of the speakers, you encounter a minimum of sound intensity when you have moved 0.33 m . assume the speed of sound is 340 m/s.part a) what is the frequency of the sound? part b) if the frequency is then increased while you remain 0.21 m from the center, what is the first frequency for which that location will be a maximum of sound intensity? express your answer to two significant figures and include the appropriate units.