Which process is a source of outdoor air pollution? select three options.

burning gasoline at a refinery
releasing fumes at a chemical plant
emitting particles from a dump truck
releasing radon gas from a generator
emitting carbon monoxide from a heater

Ryan is examining the energy of the particles in a bar of gold. what is ryan most likely studying?

Two cannon balls weighing 18 kg and 24 kg are chained together and fired horizontally with a velocity of 165 m/s from the top of a 21-m wall. the chain breaks during the flight of the cannonballs and the 18-kg cannonball strikes the ground at t = 1.5 s, at a distance of 240 m from the foot of the wall, and 7 m to the right of the line of fire. determine the position of the other cannonball at that instant. neglect the resistance of the air.

Avector a⃗ has a length of 8.6 m and points in the negative x direction. find the x component of the vector −3.7a⃗ .