If the distance between two masses is tripled, the gravitational force between changes by a factor of

A. 1/9

B. 1/3

C. 3

D. 9

On an essentially frictionless, horizontal ice rink, a skater moving at 5.0 m/s encounters a rough patch that reduces her speed by 40 % due to a friction force that is 22 % of her weight.

Describe wha scientists can learn about the past by studying fossils

What metal do they use inside the torch to conduct electricity

Which best describes the transition from gas to liquid? A. Energy must be removed because particles in liquid move more slowly. B. Energy must be added because particles in liquid move more quickly. C.

Which law represents an induced electric current? A. Ampere's Law B. Ohm's Law C. Faraday's Law D. Gauss's Law

The liquid electrolyte in the battery typically takes what kind of net charge? a. positive b. negative c. neutral

Relating to Newton's Third Law, action and reaction, what is the reaction when a rocket expels gas, smoke and flames from the nozzle end of the rocket engine?

Three light bulbs are connected to a battery in a series circuit. How will the bulbs behave if the circuit is closed?

Luke investigated the heating of water

In the nucleus of all atoms are sub-atomic particles called protons and neutrons. all protons have a positive charge.