Why are all machines not 100% efficient

A. Mass

B. Gravity

C. Friction

D. Distance

Match the following moves to the correct total distance and displacement of the moves. A. Move 2 m east and then 12 m east B. Move 10 m east and then 12 m west C. Move 8 m west and then 16 m east D.

What element are the cores of massive stars made of when a supernova occurs? a. silicon b. iron c. oxygen d. neon

Accidentally breathing foreign particles into the lungs is called

Which phases of matter do molecules have the lowest amount of energy?

What is created when solids, liquids, an gases mix with one another

You have an open air column of length 1.40 m in air at 24.2 °C. What is the frequency of the third harmonic?

Why do we use average force while solving momentum problems? How is net force related to the momentum of the object?

If you had a positive 8 score on the sit-an-reach test you

65 million years ago there was a mass extinction that is best known for killing the dinosaurs. There was also a large deposit of dust that contained substances only found in asteroids.

Near which location in New York State would a geologist have the greatest chance of finding dinosaur footprints in the surface bedrock?