Sue can easily lift a 60-N rock with the help of a lever. When she pushes down with 20 N of force, she lifts the rock .75 meters. how far does she move her arm to do this?

Mike walks 100 meter north, then walks 30 meters south. after this, he walks another 10 meters north. what is the magnitude of his total displacement during this walk,in meters?

Although light from the sun appears white, it is actually made up of a lot of different colors. this portion of the electromagnetic spectrum, we call white light is referred to as within the electromagnetic spectrum.

In a given chemical reaction, the energy of the products is greater than the energy of the reactants. which statement is true for this reaction?