if you have to apply 40 N of force on a crowbar to lift a rock that weighs 400 N, what is the actual mechanical advantage of the crowbar?

If heat is absorbed by water, what phase change occurs. A. gas to solid. B. liquid to gas. C. liquid to solid. D. solid to liquid

Which formula is used to calculate average velocity

Which of the following contains the most thermal energy? a. a cup of hot water b. a cup of cold water c. a hot tub full of hot water d. a large bucket of hot water

Anybody have the answers to Earth Science Semester B Test Lesson 3 unit 10

What is velocity measured in?

Which of the following is not part of testing a hypothesis? A. Making a theory B. Making a model C. Gathering evidence D. Collecting data

What are two types of charges that particles possess

A machine does 1,500 joules of work in 30 seconds. What is the power of this machine?

A boy standing on the deck of a bridge sees a motorboat approaching in the water below at a constant rate of speed. When the boat is 27 meters from the bridge, the big drops a stone to the water below. If the stone strikes the water 3.

Which object has a varying speed? A. a bird flying 10 m/s for 10 seconds B. a car slowing from 60 m/s for 10 seconds C. a fish moving at 2 m/s for 5 minutes D. a car traveling the speed limit