Which of the following is an example of an electromagnetic wave?

A. sunlight

B. an earthquake

C. the sound of kids playing

D. butterflies flying through the air

Determine the kinetic energy of a 1000kg roller coaster car that is moving with a speed of 20.0m/s

6. A 0.09 kg arrow hits a target at 22 m/s and penetrates 4 cm before stopping. a. With what average force did the target exert on the arrow? b. With what average force did the arrow exert on the target? c.

If someone weighs 1,059 N, what is their mass

A 0.40kg soccer ball approaches a player horizontally with a velocity of 18m/s north. the player strikes the ball and causes it to move in the opposite direction with a velocity of 22m/s. what impulse was delivered to the ball by the player?

How does the motion of the gas molecules in the balloon change as heat is added?

During eccentric muscle contraction, the muscle

What is a string theory?

When a sound source is moving away from an observer, the observer will hear a lower pitch. This is due to

What is the difference between a meteorite and a asteroid?

Which of the following best explains why a magnet sticks to a refrigerator? the magnet is