Refraction occurs when a wave

a.

enters a new medium at an angle.

b.

hits a surface through which it cannot pass.

c.

moves around a barrier.

d.

interferes with another wave.

When you hold a ball above ground it has kinetic energy true or false

18. In an airplane flying at a constant speed, the force pushing the airplane forward is exerted by the engine and is equal to the opposite force of air resistance. Describe how these forces compare when the plane speeds up and slows down.

Which situation during a basketball game involves centripetal acceleration A) The official tosses the ball up for the opening tip-off. B) A player passes the ball to another player. C) The basketball bounces off the backboard.

In Shinto, there is s strong emphasis on purification and recognition of the role environment plays in creating harmony. Explore the connection between environment and Shintoism.

What causes the phenomenon of seasons on Earth

Steve hears a siren emitting a frequency of 10 kHz when it is at rest. What frequency will Steve hear if the siren moves toward him at 30 m/s? Assume the speed of sound is 340 m/s. Answer options are: a. 11 kHz b. 10 kHz c. 0 kHz d. 9 kHz

What is the efficiency of a machine that has work input of 40 joules and work output of 35 joules

What happens to an object if the forces acting on it are unbalanced?

A 92-kg astronaut and a 2000-kg satellite are at rest relative to a space station. the astronaut pushes on the satellite, giving it a speed of 0.14 m/s directly away from the station.

How to calculate wavelength in m when you know the frequency?