In order for exercise to be effective, it must substantially increase heart rate. True False

Suppose that an object speeds up while moving horizontally. In this situation, the object's kinetic energy would _.

How is an electric current carried? by moving current in one direction by changing directions of the current by moving electrons in a wire by changing electrons into current

What happens if you stick a charged balloon to a metal object?

The weightlessness that an astronaut feels in space is due to increased air resistance A. True B. False

1What action by Congress allowed President Johnson to expand the war in Vietnam? Why?

Which part of the ear vibrates at the frequency of sound waves

A submarine that is in the sea what principle is that

1. It takes 26.5 N to pull a 72 kg sled across snow. What is the coefficient of friction? 2. A 565 N rightward force pulls a large box across the floor with a constant velocity of 0.75 m/s. If the coefficient of friction is 0.

A person holds onto an object for 2 minutes, but doesn't move the object. Is work done on the object?

Which two vectors add together to give a resultant with the smallest magnitude, and which two vectors add to give a resultant with the largest magnitude? in each case specify the magnitude and direction of the resultant?