Which phrase best defines nuclear fission? a. splitting the nucleus of the atom b. combining two nuclei c. combining two atoms chemically d. stripping the electrons from an atom

A100-watt light bulb radiates energy at a rate of 100 j/s. (the watt, a unit of power or energy over time, is defined as 1 j/s.) if all of the light emitted has a wavelength of 525 nm , how many photons are emitted per second?

How are isotopes of the same chemical element alike? how are they different?

Which describes fat? a: a carbohydrate that produces energy b: a nucleic acid that directs cell function c: a lipid that stores energy d: a protein that speeds up a chemical reaction