Reactions, such as a fire burning, give off energy in the form of heat. They're called

A. Four equal particles with positive charge q = 14.418x10-19 C and mass m = 81.99x10-31 kg are initially held at the four corners of a square of side L = 0.07 m. What is the total electric potential at the center of the square? (in V) B.

Two students are looking at a brightly lit full Moon, illuminated by the reflected light from the Sun. Consider thefollowing discussion between the two students about what the spectrum of moonlight would look like.

Which is not true of alpha radiation? O A. It increases the number of protons. O B. It has a positive charge. O C. It causes transmutation. O D. It is heaviest of the three types

What number has four significant figures?

Elements heavier than hydrogen are formed when light elements undergo nuclear fusion. Fusion takes place within stars at temperatures nearing 108K. Explain why this high energy is required for fusion to occur.

Which vocabulary term is survival of the fittest

An object weighs 32 newtons. What is its mass if a gravitometer indicates that g = 8.25 m/s2?

At what stage of a reaction do atoms have the highest energy? a. reactant stage b. product stage c. transition state stage d. The stage of highest energy depends on the atom.

A moon with a mass of 6.0 x 10 kg orbits about a planet with a mass of 5.0x 10^24 kg. They are 4.0 x 10^8 meters apart What is the gravitational force between them? The answer is 1.

What is the expression of the chemical composition of a compound?