A skater makes one revolution per second, f = w/(2p) = 1, with her arms and leg stretched (left). By lowering her leg and bringing her arms close to her chest (right) she reduces her moment of inertia from I to I′ = 0.4I. How many revolutions per second, f′ = w¢/(2p), is she making now? Show all your work.

f'=w'/2p=2.49rev/s

Explanation:

The angular momentum L must be equal for both cases.

Hence you have that

L before = L after

I = moment of inertia

w =angular momentum

Hence

f'=w'/2p=2.49rev/s

hope this helps!!

c) up is the direction the magnetic force is acting on the charge.

explanation:

considering the bohr theory, the type of connection that requires the transfer the answer conuldn't be right