Match each front with its description. occluded front
when a warm air mass slides over a cold air
mass
stationary front
when a cold air mass slides under a warm
air mass
cold front
when two cold fronts force a warm front up
and block it from the surface
warm front
when a cold air mass and a warm air mass
meet and do not move

Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.

There is a single path for electrons. the current decreases when additional resistors are added. the current will be the same in each resistor. these statements best describe a(n) circuit.

Plz mark brainliest 30 points1) find the momentum of a 12 kg snowball that is rolling with a velocity of 9 m/s.2) an 8 ball with a mass of .5 kg is sitting at rest. it is hit by the cue ball (1 kg) traveling at 2.5 m/s. if the cue ball is at rest after the collision, how fast is the 8 ball traveling after the collision? 3) two football players are running toward each other. if the offensive player is 75 kg and is running 8 m/s, how fast must the 60 kg defensive player run in order for the two players to hit and stop?