Which of the following are electromagnetic waves?
a) sound waves
b) water waves
c) ground waves
d) light waves

What is the relation between concentration of reactants and the rate of chemical reaction?

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

What type of radiation is lead emitting in the following equation? alpha particles beta particles gamma rays