A ball is rolling a 5 m/s down a hill the ball has 20 J of energy what is the mass of the ball

1.6kg

8kg

50kg

How do particles of gases affect one another's motion

What do waves carry through objects?

Clothes dryer uses about 7 amps of current from a 240 volt line. How much power does it use?

Decide which of the following day to day activities is considered aerobic exercise

A baseball on a T-ball stand has no momentum until it is hit with a bat. When Tyler swings the bat, it has a momentum of 12 kg m/s. After the bat hits the ball, the ball has a momentum of 8 kg m/s.

Find the magnitude of the sum of these two vectors

Light waves that cross from an air medium to a water medium will A. O be focused into a straight line. B. O lose energy and dissipate. C. O change length and direction. D. O reflect off the water's surface.

What is a possible cost of using nonrenewable energy resources? A. Costs more money B. Less water pollution C. Sustainable energy D. Greenhouse gases

Kara is writing a science-fiction story. In the story, Earth no longer experiences day and night. To return Earth to normal, which action should the heroine of the story take? A. She should get the Sun to travel around Earth again. B.

What is the kinetic energy of a 55-kilogram skier traveling at 9.0 meters per second