How much gravitational potential energy does a 45.2 kg object have when it is 21.9m above the ground?

A section of river that is 90.0 m wide has a current which flows south at 2.00 m/s. Some physics students paddle their canoe at 3.00 m/s east relative to the water. What is the resultant speed of the canoe relative to the banks of the river

A 6.0 * 103 kg car accelerates from rest at the top of a driveway that is sloped at an angle of 19.3 ◦ with the horizontal. An average frictional force of 4.4*103 N impedes the car's motion so that the car's speed at the bottom of the driveway is 4.

Is a compound a pure substance? Why or why not

Mary slides down a snow-covered hill on a large piece of cardboard and then slides across a frozen pond at a constant velocity of 2.40 m/s.

Lucinda frequently finds herself getting upset and yelling at her husband, co-workers, and friends. What therapeutic technique would start with having Lucinda keep a record of when, where, and with whom she loses her temper?

If you need to drive from Dallas, Texas, to Salt Lake City, Utah, (about 1500 miles), and the speed limit is 60 miles per hour most of the way, what is the least amount of time you will need? A. 4 hours B. 25 hours C. 2.5 hours D. 90,000 hours

Which of the following statements about the Coriolis effect is correct? a. The Coriolis effect is not affected by wind speed. b. The Coriolis effect is weakest at the poles. c. The Coriolis effect does not affect wind direction. d.

What force would be needed to make a 10kg bowling ball accelerate down the alleyway with an acceleration of 3m/s2

If traveling at equal velocities, which object would have the most momentum

Which of the following happens when a material undergoes a phase change? a. The temperature changes. b. Heat flows into or out of the material. c. The chemical composition changes. d. The molecules break apart into atoms.