In refraction, when a wave travels from one medium to another, it

A. changes speeds.

B. stays in step.

C. always moves in the same direction.

D. travels in the opposite direction.

Unless otherwise posted, what is the speed limit for cars in a residential area?_ A) 20 mph B) 25 mph C) 30 mph

Determine the pressure acting on a surface of area equal to 2 m2 if the force applied to the surface is 4 N

How much energy is contained in matter what the mass of 1 gram (0.001 kilogram)

An object with a mass of 2 kg has a force of 4 N acting on it. What is the acceleration of the object?

Which electron transition would result in the greatest amount of energy to be absorbed? a) n = 4 to n = 1 b) n = 1 to n = 4 c) n = 2 to n = 1 d) n = 1 to n = 3 e) None of the choices are correct

An apple drops from a tree and hits the ground in 1.5s what is its speed just before it hits the ground?

Sound travels slow in cold air. Why does the speed of sound depend on air temperature?

A tow truck pulls a 500 kg car so that the car accelerates 2 m/s2. What is the net force on the car? 250 N 498 N 1000 N 502 N

Which force keeps you near earths surface?

Name one process that requires a force in the human body.