What determines the color of light? 1. brightness
2. wavelength
3. amplitude
4. reflection rate

How much work is done lifting a 9.10 kg box straight up onto a shelf that is 1.80 m high?

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?

Of is j/kg·k. if a 2.6 kg of isk to k,is ?