I would think the answer is c.
Answer:
tsunami
Explanation:
A tsunami is a series of waves that come ashore at interval 10-45 mintues
Answer:
Explanation:
Given
mass m collides elastically with floor and jump to its original height I .e.velocity of rebound is same as the initial velocity
Impulse imparted by steel ball to the ground is given by the change in momentum of steel ball

and impulse is product of average force and time
so we need time to calculate the average force. So, option e is correct