Which device is used to increase or decrease the voltage of an alternating

current?

O

A. A commutator

O

B. A generator

O c. A motor

O

D. A transformer

A car is moving at 50mi/hr. If the car travels for 5hours how many miles (mi) did the car travel? Make sure you include the proper unit. (Not multiple choice)

A jetliner has a velocity of 95 m/s. What is the displacement of the jetliner at t=3.0 seconds?

Why do you think the earth has fewer craters than the moon

Describe how the gas particles inside the balloon exert pressure on the balloon

A defensive tackle picks up the 0.5kg football to a height of 0.8m in 0.25s ... 1. calculate the work done 2. calculate the power generated

Floating in deep space, you find yourself at rest next to a small asteroid. You reach out and tap the asteroid with a hammer. What happens to you in this process?

You walk forward at 1.5 m/s for 8s. Your friend decides to walk faster and starts out at 2.0 m/s for the first 4 s. Then she slows down and walks forward at 1.0 m/s for the next 4s. Make a distance-time graph of your motion and your friend's motion.

If the coolant in a refrigerator was not compressed back into a liquid after it flowed through the refrigerator what would happen

A electric model train travels at 0.339 m/s around a circular track of radius 1.75 m. How many revolutions does it perform per second, i. e, what is the motion's frequency?

Which characteristic best describes how nuclear decay differs from nuclear fission?