What is the frequency of a photon of wavelength 35 centimeters (cm)?

Which form of relativism states that people rely on their own standards of right and wrong when making a decision?

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 are scientists who study fossils called? ( a ) astronomers. ( b ) biologists. ( c ) geologists. ( d ) paleontologists.