Amy counts the wave crests traveling down a stretched string. Five wave crests pass Amy in two seconds. What is the frequency of the wave?

A. 5.0 Hz

B. 2.5 Hz

C. 10 Hz

D. 2.0 Hz

What do tire treads, rubber mats, automobile brakes, and tennis shoes have in common?

How is elastic energy related to mechanical energy?

Which takes longer to reach earth, light from the sun or light from other stars? Explain.

1. What reaction fuels the buring of the sun? combustion fission fusion transmutation

The distance from home plate to the pitchers mound is 18.5 meters. For a pitcher capable of throwing at 3.85m/s (86mi/hr), how much time elapses between the release of the ball and the ball passing home plate?

7. Who is Mara Grunbaum?

How much work is done in holding a 10 newton sack of potatoes while waiting in line at the grocery store for 3 minutes.

Define light year and explain how and why light years are used to measure distances in the universe

A farmer had 15 sheep, and all but 8 died. How many are left?

While playing with her 5 year old cousin, a Physics 135 student pushed him forward on his scooter. She pushes with a force of 50 Newtons for 3.5 seconds. If the boy and the scooter together have a mass of 30 kg, what is their final velocity? a. 2.