A ball on an extremely low-friction, tilted surface will slide downhill without rotating. If the surface is rough, however, the ball will roll. Explain.

A gallon of paint covers 20 ft2 of surface area. how many revolutions can an 8 in. wide paint roller with a diameter of 3 in. make before using up a 5-gal can of paint?

A sound wave of the form s = sm cos (kx - ? t + f) travels at 343 m/s through air in a long horizontal tube. At one instant, air molecule A at x = 2.000 m is at its maximum positive displacement of 6.00 nm and air molecule B at x = 2.

You enter a room. There are 34 people. You killed 30. How many people are left in the room?

Sodium is a highly reactive metal and chlorodyne is a poisonous gas which compound do they for a chemically combines

Which will move faster: a toy car rolling across sandpaper or a toy car rolling across the table?

A refrigerator is a system. The energy input into the refrigerator system (in the form of electricity) is the same as the amount of energy output from the system. Which of the following best describes the energy output of the system?

A 1,120 kg car is travelling with a speed of 40 m/s. Find its energy.

3. Calculate the amount of current through a 45-watt light bulb that is connected to a 120-volt circuit in your home.

Are oranges called oranges because oranges are orange, or is orange called orange because oranges are orange?

An object at rest has no net force acting on it. a. True b. False