What negatively charged particle was discovered through the study of cathode rays?

A man pulls a sled at a constant velocity across a horizontal snow surface. if a force of 80 n is being applied to the sled rope at an angle of 53° to the ground, what is the force of friction between sled and snow?

Why does the cyclist have less kinetic energy at position A than at position B? Options are A. Their is less friction between the tire and the road at position A than at position B. B.

Q:Why does a sheet of sandpaper become warm when you rub it against a wooden board? Possible Answers: A. Heat in the air is transferred to the sandpaper, B. Matter in the sandpaper is converted into heat, C.

Determine the amount of potential energy of a 5-newton book that is moved to three different shelves on a bookcase. The height of each shelf is 1.0 meter, 1.5 meters, and 2.0 meters.

Explain the difference between waterproofing and dampproofing. When is one or the other an appropriate choice for protecting a foundation from moisture?

When You lift a load, the resistance force is? A. magnetism b. gravity

What changes a ball velocity

A rock with mass m = 3.60 kg falls from rest in a viscous medium. The rock is acted on by a net constant downward force of F = 15.

Two electrons are 2.3nm apart. What is the force between two electrons?

3. In a demonstration learning activity, A. the teacher shows children how something works or how to complete an entire activity. B. each child shows and tells about a favorite toy. C.