A10 kg backpack is on the floor. someone gently pulls on it, upwards with a 15 n force. what is the normal force acting on the backpack?

Gam radio signals can usually be heard behind a hill, but fm often cannot. that is, am signals bend more than fm. explain. (radio signals, as we shall see, are carried by electromagnetic waves whose wavelength for am is typically 200 to 600 m and for fm about 3 m.)

Acombination reaction is when two or more combine to form one product. a decomposition reaction is when a substance breaks down into two or more simpler substances in a chemical reaction.

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island