What is the Kinetic Energy of a 60 kg person on skis traveling 20 m/s? (KE = ½ mv2)

Remember ENERGY is measured in JOULES!24,000 Joules

1,200 Joules

12,000 Joules

600 Joules

What is the earliest point in the universe that we can observe? why can’t we see back further than this?

20. threshold braking in the vehicle's braking system occurs when a. the brake pedal is pushed, heel on floorboard, with full foot pressure. b. the brakes are exerting full braking power, without traction loss. c. the driver begins pushing down the brake pedal, with moderate slowdown. d. the brakes just begin to take hold with a gradual slowdown.

Unpolarized light of intensity so passes through two sheets of polarizing material whose transmission axes make an angle of 60∘ with each other as shown in the figure. what is the intensity of the transmitted beam, st?