At which stage of the thunderstorm can you except it to begin to die down

a. the cumulus stage
b. the mature stage
c. the dissipation stage

Determine the wavelength of the light absorbed when an electron in a hydrogen atom makes a transition from an orbital in the n=3 level to an orbital in the n=7 level.

Transportation is the largest single source of air pollution in the united states. air pollution can harm the environment and human health. which technology could offer a solution to this problem? mufflers that reduce noise motors that run on electricity tires that improve gas mileage

How to calculate the mass of copper