. Law of Conservation of Momentum
(for a perfect system)
Total Momentum Before Total Momentum After
(20kg)(2m/s) + (10kg)(-1m/s) = (20kg)(0.5m/s) + (10kg)( 2m/s)
40kg m/s + -10kg m/s 10kg m/s + 20kg m/s
30kg m/s 30 kg m/s
-

What is the relationship between the wavelength of a wave and it's energy?

Aball tossed vertically upward from the ground next to a building passes the bottom of a window 1.8 s after being tossed and passes the top of the window 0.20 s later. the window is 2.0 m high from top to bottom. what was the ball's initial velocity? the unit vector j^ is directed upward. how far is the bottom of the window from the launch position? how high does the ball rise above the launch position?

Answer as quick as ! kate is working on a project in her tech education class. she plans to assemble a fan motor. which form of energy does the motor convert most of its electric energy into? a. light energyb. motion energyc. sound energyd. thermal energy