<span>Angular speed = total degree / time
As = 360*(2.5) / 3.0 min (60)
As = 900 deg / 180 s
As =5 Degree / second</span>
It is very difficult for an atom to accept a proton. It can only be done under very special circumstances. So A and C are both incorrect. I don't see how D is possible. The atom does lose 1 electron, but how it gets 21 is think air.
The answer is B which is exactly what happens.
Answer:

Explanation:
As we know that the total mass of the all four players is given as


diameter of the piston of cheer leader is given as

are of cross-section is given as


mass of the cheer leader is given as
m = 55 kg
so the pressure due to cheer leader is given as



Now on the other side pressure must be same
so we have





so diameter on the other side is given as

