Gravity pulls downward on a rock with a force of 800 N. If you pull upward on the rock with a force of 400 N, what is the total force acting on the rock?

A. 400 N downward

B. 400 N upward

C. 1200 N downward

D. 1200 N upward

If you going 80mph how long will it take you to go 80 miles

Suppose that a person riding on the top of a freight car shines a searchlight beam in the direction in which the train is traveling. How does the speed of the light beam relative to the ground compare to the speed of beam when the train is at rest?

Why is it difficult to block light

How has scientific experimentation affected the model of an atom? The atomic model has become more accurate because of this experimentation. The atomic model has become a less accurate representation of the actual atom.

A mass of 5kg accelerates at 3m/s/s, how much force was put on it?

A particle is to move in an xy plane, clockwise around the origin as seen from the positive side of the z axis. In unit vector notation, what torque acts on the particle if the magnitude of its angular momentum about the origin is (a) 4.

A book is sliding across a horizontal desk and comes to a stop. the books kinetic energy was converted into what type of energy

A ship sends out a pulse of sound and receives an echo back one second later. If the water is 750m deep, what is the speed of sound in water?

You are given a material which produces no initial magnetic field when in free space. when it is placed in a region of uniform magnetic field, the material produces an additional internal magnetic field parallel to the original field.

Where are chromosomes found in an animal cell?