Answer:
final speed after pure rolling is given as 
Explanation:
As we know that point of contact at ground is taken as reference then there is no external torque about this point on the ball
So we can use angular momentum conservation about this point
so we have
So final speed after pure rolling is given as
Answer:
Explanation:
Given
base of water tank 
Initial volume of water 
Water leaves the tank at the rate of
Integrating rate to get desired volume
at 
at 
therefore
and 
Thus height of water remaining is 
Answer: Energy from the core travels by radiation through the radiative
zone, then by convection through the convection zone.
Explanation:
