Place a CO2 canister in the car and launch it down the track. The track length will be approximately 20 meters (roughly 66 feet). You will need a stopwatch to get the time of the car that goes the furthest down the track. Record your results of the other CO2 cars. Find velocity.

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?

Diamond will scratch quartz. true or false

What is the efficiency of an engine that does 80 j of work and exhausts 320 j of heat while taking in 400 j of heat ? a. 10% b. 20% c. 80% d. 25%