As a skateboarder moves downhill, some of the energy of the skateboarder is

A) lost.

B) kinetic.

C) potential.

D) kinetic and some is potential.

What happens to a planes wing when air moves taster over the top of? it has no effect it achieves lift it begins to decrease it's altitude

Five basket ball teams are playing in a tournament. The teams will play with each other only one time. How many games will be play by the end of the tournament?

It takes four hydrogen nuclei to create one helium nucleus in the proton-proton chain, which is the main energy source of the Sun. If a single hydrogen nucleus has a mass of 1.6726*10-27 kg and a single helium nucleus has a mass of 6.

A 1200-kilogram space vehicle travels at 4.8 meters per second along the level surface of Mars. If the magnitude of the gravitational field strength on the surface of Mars is 3.

18 Newton's lifted 5 meters? How much is in joules?

A 5.00-kg howler monkey is swinging due east on a vine. It overtakes and grabs onto a 6.00-kg monkey also moving east on a second vine. The first monkey is moving at 10.0 m/s at the instant it grabs the second, which is moving at 7.00 m/s.

One of the heating systems we talked about in this course comprises of a system of ducts. What is the process by which heat is transferred in this system? a. Conduction b. Convection c. Radiation d. None of the above

If the north pole of a magnet in a compass is attracted to Earth's geographic north, what must be the polarity of Earth's magnetic north pole? A. north B. south C. It can't be determined from the information given.

A canoe started its trip at 8 am. If the cannoe travelled at a speed of 70 mph how far did it travel by 1:36 pm?

1. Tariff of 1828 John C. Fremont 2. abolitionist who led the raid on Harper's Ferry John Brown 3. published The Liberator Santa Anna 4. Underground Railroad Harriet Tubman 5. died at the Alamo William Lloyd Garrison 6.