Afan rotating with an initial angular velocity of 1000 rev/min is switched off. in 2 seconds, the angular velocity decreases to 200 rev/min. assuming the angular acceleration is constant, how many revolutions does the blade undergo during this time.

a) 10
b) 20
c) 100
d) 125
e) 1200

What is the energy of a photon of ultraviolet radiation with a frequency of 4.4 × 1015 hz? planck’s constant is 6.63 × 10–34

A250-n box is at rest on a frictionless horizotal floor. then a person shoves the box with a non-zero force of magnitude p. which statement best describes the relationship betweeen p and the motion of the box after it was shoved? -the box will not move when p< 250n but otherwise will accelerate at a constant rate that is directly proportional to p - the box will begin moving at a speed that is directly proportional to p, then will gradually slow to a halt -the box will move with constant velocity at a speed that is directly proportional to p -box will accelerate across the floor at a constant rate that is directly proportional to p

What’s #16 asking and how do i solve it?