In which of these situations is convection most likely the main form of heat transfer?

warm air from a heater on the first floor of a house moves to the upper floors.

the sides of a metal pan become hot when the pan is placed on a stove burner.

a person gets a sunburn from lying on the beach too long.

an ice cube melts when a person holds it in his hand.

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?

If you add 5.00 ml of 0.100 m sodium hydroxide to 50.0 ml of acetate buffer that is 0.100 m in both acetic acid and sodium acetate, what is the ph of the resulting solution? acetic acid: ka = 1.8. x 10-5

Why is the bottom layer of a trophic pyrimid the