Which of the following is NOT a way that machines provide a mechanical advantage?

a. change direction

b. change distance

c. change power

d. change force

The intense heat from Earth's interior that warms the magma beneath Earth's surface is called?

Why are force fields used to describe magnetic force? A. Magnetic force acts between two objects that are not touching. B. Magnetic force is a form of gravity. C. Magnetic force acts between any two objects with mass. D.

Design an investigation to compare the durability of the three different brands

Which type of friction gives the least opposition to motion

Which of the following air conditions would be least likely to have precipitation? A. warm, dry air B. warm, moist air C. cold, moist air D. cold, dry air

What is one way to increase the amplitude of a wave in a medium

A net force of 3000 N is accelerating a 1200 kg elevator upward. If the elevator starts from rest, how long will it take to travel up 15 m?

The frequency of a given region of the electromagnetic spectrum ranges from 3 _ 1016 _ 3 _ 1019 hertz. Which type of wave is found in this region?

A student is testing the kinematic equations for uniformly accelerated motion by measuring the time it takes for light-weight plastic balls to fall to the floor from a height of 3 m in the lab. The student predicts the time to fall using g as 9.

Newton's Second law of Motion (F = ma) is one of the basis of forces and motion. How is it very similar to his First law and why is finding the acceleration of the system (the main reason we use it) so important to solving physics and real world