The mantle in the Earth continually heats up and cools down using convection currents.

a. True

b. False

a fission reaction possible is that certain atoms are

When a surface is submerged in a fluid, the resultant pressure force on the body acts in what manner? Assume no shear forces are present. There are no forces acting on the submerged body. Perpendicular to the surface of the body.

If you push on a door for 12 seconds with a force of 53 N, how much impulse have you applied to the door?

To delay the onset of muscle fatigue, not all the motor units in a muscle will contract at the same time. Some will remain relaxed while others are contracting.

How do astronomers think Jupiter generates its internal heat? A) radioactive decay B) internal friction due to its high rotation rate C) chemical processes D) nuclear fusion in the core E) by contracting, changing gravitational potential energy into

A dc generator is the same as a (n) a. electric motor. b. ac generator. c. armature. d. electric current.

Which of the following best describes scientific knowledge A.) Durable B.) Absolute and never changing C.) Frequently varies

Beth made the chart shown. A 2-column table with 1 row. The first column labeled X has entries Wall clock, T V remote control, Portable music player. The second column labeled Y has entries Refrigerator, Table lamp, Hair dryer.

Which sentence states Newton's third law? If two objects collide, each object exerts a force in the same direction as the other. If two objects collide, each object exerts a force equal to and in the opposite direction of the other.

Why did the chicken cross the road.