37 - Why do we oil door hinges?

What causes plastic flow to occur? A. Crevasses B. Low pressure c. High pressure D. Basal slip

Differentiate between a cation and an anion.

On a hot summer day in the state of Washington while kayaking, I saw several swimmers jump from a railroad bridge into the Snohomish River below. The swimmers stepped off the bridge, and I estimated that they hit the water 1.50 s later. a.

Which of the following are examples of a force? (choose as many as apply) (A.) friction (B.) weight (C.) speed (D.) acceleration

Why efficiency of a simple machine can not exceed 100%

Explain why your weight would be less in the moon than on earth even though your mass would not change. Use the law of universal gravitation in your explanation.

ions are atoms or groups of atoms that have a positive or negative charge. which of the following statements is true of ions?

1. According to the nebular theory, the solar system formed from? A. accretion of protoplanets. B. a large, thin cloud of dust and gas. C. colliding planetesimals. D. all of the above 2.

What is the difference between tangential acceleration and centripetal acceleration?

A ball rolls down a ramp. The ball has a mass of 1 kg and it has 18 joules of kinetic energy. What is the ball's speed?