What happens when a body of cold air approaches a body of warm air

A child walks 35 meters in 7 seconds. calculate the child's speed.

What caused a bread riot in Russia?

Interference is evidence of the particle nature of light. true or false

The nightly winter temperature drop in a seaside town is usually less than that in nearby towns that are farther inland. explain.

What is the momentum of a 2.0kg ball rolling at 6.0 m/s

How much work is done when a 4.0-newton box is carried horizontally a distance of 2.0 meters at a constant velocity?

You push a shopping cart filled with groceries (total mass = 20 kg) by applying a force to the cart 30° from the horizontal. If the force you apply has a magnitude of 86 N, what is the cart's acceleration? Assume negligible friction.

Does water expand more as the temperature drops even more below 0 deg? I am worried about the coolant in my rad. as the temp. is 40deg below.

A 1.00-kilogram ball is dropped from the top of a building. just before striking the ground, the ball's speed is 12.0 meters per second.

Why oil does not dissolve in water?