Which of these describe the composition of earths atmosphere?

A) mixture

B) substance

C) compound

An object to charge 2.00 c is a pretty from a second object with the same charge by a distance of 1.50 m what is the electric force acting between the charges

As an object falls toward earth, the potential energy of the object ... A. Increases B. Decreases C. Stays the same

Which type of friction can best be described as the force between objects that are moving? A. Sliding Friction B. Static Friction C. Kinetic Friction D. Rolling Friction

Why is it more comfortable to fall onto a big pillow than onto a wooden floor? A. The pillow transfers less impulse from you. B. The wold exerts more force in total C. The pillow distributes the decelerating force over a greater amount of time. D.

While eating a peanut butter and jelly sandwich, peanut butter drips on Diana's shirt. She tries to remove the peanut butter from her shirt by rubbing the spot with water, but it doesn't work.

What is the momentum of a 2 kg ball traveling at 2m/s

A constant force is exerted for a short distance on a block of mass that is initially at rest on a horizontal frictionless plane. This force gives the block a certain final speed v.

A football quarterback is moving straight backward at a speed of 3.00 m/s when he throws a pass to a player 20.0 m straight downfield. (a) if the ball is thrown at an angle of 25.

Simone is walking her dog on a leash. The dog is pulling with force of 34 N to the right and simone is pulling backward with a force of 16 N

An object moves with velocity v (t) = t^2-8t+7 a) write a polynomial expression for the position of the particle at any time t greater or equal to zero.