Which phase change is the reverse of condensation?

a) freezing

b) sublimation

c) vaporizing

d) melting

At about 55 meters/sec, a falling parachuter (before the parachute opens) no longer accelerates. Air friction opposes acceleration.

Two planets have the same surface gravity, but planet b has twice the radius of planet a. if planet a has mass m, what is the mass of planet b? a. m/ b. m c. m d. 4m e. m/4

The energy of a water wave is most closely related to its

Which NBA team did gary payton play with in 2006

A spring has a spring constant k = 7.85 N/m. If the spring is displaced 0.230m from its equilibrium position, what is the magnitude of the force that the spring exerts?

A swimmer jumps from a waterfall thats is 8.5 m high from the lake below. How fast must he run horizontally to dive 2.5m away from the base of the waterfall?

What happens (as far as energy goes) when a molecule of gas strikes the wall of a container?

The boom of a fire truck raises a fireman (and his equipment - total weight 280 lbf) 60 ft into the air to fight a building fire.

Two masses are separated by 1 m. suppose the masses are moved so they are 2 m apart how will the gravitational force change

Bob rubs a piece of fur on a hand rubber rod, giving the rod a negative charge. what happens?