What will happen if you rub two different materials together?

Besides gravity, what other factors, if any, hold us to the Earths surface?

A 52.0 kg skateboarder does a trick on a half-pipe. During the trick, he reaches a speed of 8.90 m/s. The radius of the half-pipe ramp is 3.00 meters. What is the minimum centripetal force necessary to keep the skater on the ramp?

Which sentence best explains why ocean water beat the equator is warmer than the ocean water far from the equator

Which of the following energy sources is NOT a type of coal or coal-precursor? Peat Petroleum Lignite Anthracite

Which of the following situations is impossible a) a body having velocity east and acceleration west b) a body having velocity east and acceleration east c) a body having zero velocity but non-zero acceleration d) a body having constant velocity but

A six - sided number cube is labeled with the number 1-6, one number on each face. Each number is used exactly once. How many possible outcomes exist when the cube is rolled two times

What will happen to an electromagnet of the electric current is lost?

How can velocity be used to calculate for an unknown distance? (Logically)

A rod made from insulating material carries a net charge, while a copper sphere is neutral. The rod and the sphere do not touch. Is it possible for the rod and the sphere to (a) attract one another and (b) repel one another? Explain.

Which of the following best explains why mutations cannot cause evolution?