A67.5-kg basketball player jumps vertically and leaves the floor with a velocity of 1.99 m/s upward.

(a) what impulse does the player experience? magnitude 134.33

(b) what force does the floor exert on the player before the jump?

(c) what is the total average force exerted by the floor on the player if the player is in contact with the floor for 0.450 s during the jump?

Amichelson interferometer operating at a 600 nm wavelength has a 3.02-cm-long glass cell in one arm. to begin, the air is pumped out of the cell and mirror m2 is adjusted to produce a bright spot at the center of the interference pattern. then a valve is opened and air is slowly admitted into the cell. the index of refraction of air at 1.00 atm pressure is 1.00028.how many bright-dark-bright fringe shifts are observed as the cell fills with air?