Which of the following is true of friction? A friction makes motion possible on Earth. B. friction has mass and can be held. C. friction is always equal to velocity

A fireman is sliding down a fire pole. As he speeds up, he tightens his grip on the pole, thus increasing the vertical frictional force that the pole exerts on the fireman.

What force makes a marble role on level ground?

A magnet in the form of a cylindrical rod has a length of5.00 cm and a diameter of 1.00 cm. It has a uniform magnetization of5.50 X 10^3 A/m. What is its magnetic dipole moment?

What type of electromagnetic energy reflected by the moon is most easily seen by a person on earth?

The intensity of sunlight incident on the surface of a solar panel on your roof is 1000 W/m^2. Calculate the sunlight energy absorbed by the panel in one hour if the length of the panel is 6.00 m and its width is 4.

A proton moving in a region of a space does not experience any acceleration in the direction of motion.

Which best describes the relationship between internal energy and thermal energy? Thermal energy is a measure of the internal energy of a substance. Internal energy is a measure of the thermal energy of a substance.

5. Consider two glasses, one filled with water and the other half-full, with the water in the two glasses being at the same temperature.

1. Why is the theory that all things are made up of atoms a theory and not a fact?

A 600 N astronaut travels to an asteroid where the gravitational force is one-hundredth that of Earth. What is the astronaut's weight on the asteroid?