Imagine tying a string to a ball and twirling it around you. How is this similar to the moon orbiting Earth? In this example, what is providing the constantly changing, inward force?

Earths magnetic poles do not stay in the same place. Write a possible explanation for why earths magnetic poles move.

A 500 G ball and a 200 g or dropped from a tower. Those balls are the same size and there is no air resistance. Which one hits the ground first? the 500 g the 200g they both hit at the same time

The plates of a parallel-plate capacitor are 2.50 mm apart, and each carries a charge of magnitude 77.0 nC. The plates are in vacuum. The electric field between the plates has a magnitude of 3.00*106 V/m.

The Kelly family and the Garcia family each used their sprinklers last summer. The water output rate for the Kelly family's sprinkler was 35L per hour. The water output rate for the Garcia family's sprinkler was 20L per hour.

Is the sun was a red giant what color would the sky be?

A heat engine with a thermal efficiency of 45 percent rejects 500 kj/kg of heat. how much heat does it receive

Which was least likely to have been a component of Earth's atmosphere before life began? A-sulfur B-carbon dioxide C-oxygen D-water vapor

Vector A makes equal angles with x, y and z axis. value of its components (in terms of magnitude of vector A will be?

If a 0.200-kilogram ball sits on a shelf 2.00 meters from the floor, how much mechanical energy (me) does it possess?

Which statement describes static equilibrium? A. The forces on an object are unbalanced. B. An object has balanced forces acting on it and constant velocity. c. The forces on an object are balanced and there is no motion. D.