Which type of simple machine reduces the amount of input force needed?

A train slows down from 34 m/s to 4 m/s in 60 seconds. what is it's acceleration?

Which part of the telescope reflects light to the eyepiece

Suppose you look at a spectrum of visible light by looking through a prism or diffraction grating. How can you decide whether it is an emission line spectrum or an absorption line spectrum?

What is it called when light passes through an object

A 49 Newton rock is lifted 2 meters in 5 seconds. How much work is done? What power is used?

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?