What does force equal?

A stack of books is sitting on a table. Which force is pulling downward on it?

Like kinds of magnetic poles repel while unlike kinds of magnetic poles

The two blocks a and b have a mass of 5 kg and 10 kg, respectively. if the pulley can be treated as a disk of mass 3 kg and radius 0.15 m, determine the acceleration of block a. neglect the mass of the cord and any slipping on the pulley.

Hat is the kinetic energy of a 1.0-kg billiard ball that moves at 5.0 m/s? A. 5.0 J B. 6.5 J C. 10.0 J D. 12.5 J

Why does an atom have a net zero charge?

If a person lives in china in which two hemispheres does he or she live

When the air in a submarine's huge air tanks is decompressed and it displaces the water in the ballast tanks with air, what does the submarine do? A. It sinks B. It floats C. It provides air to the passengers

The decomposition of a substance by an electric current is called

Along some shorelines, incoming waves cause the water to simply rise and fall rather that form a surf zone. What does this tell you about these shorlines?

Which word best describes the rate at which work is done? work energy power velocity