Negative charges repel positive charges.

a. true or

b. false

At what distance between two objects would you have the greatest gravitational force

The resultant force acting on an object of mass 5.0kg varies with time as shown. the object is initially at rest.

A track begins at 0 meters and has a total distance of 100 meters. Juliet starts at the 10-meter mark while practicing for a race. After running 45 meters, how far is she from the beginning of the track? 10 meters 35 meters 45 meters 55 meters

A nuclear explosion may release tremendous amounts of energy in the form of noise, heat, visible light, radiation and an atmospheric shock wave.

a hockey player slams into a wall. If they experience a force of 100N for 8s, how much does their momentum change?

A stick of length 1.3 m is held vertically with one end on the floor and is then allowed to fall. Find the speed of the other end when it hits the floor, assuming that the end on the floor does not slip.

calculating power reach each scenario and then answer the questions scenario a 120 j of work is done in 6 seconds scenario b 160 j of work is done at 8 seconds scenario c200 J's of work is done in 10 seconds which scenario uses the most power

Which of the following is not an assumption that scientists must make about the natural world

A small car meshes with a large truck in a head-on collision. Which of the following statements concerning the magnitude of the momentum change during the collision is correct?

An egg cooking on a campfire is an example of A. only an exothermic reaction. B. only an endothermic reaction. C. an endothermic and an exothermic reaction. D. neither an exothermic nor an endothermic reaction.