· radioactive decay, fusion, fission · electromagnetic radiation of high energy · produced by sub-atomic particle interactions · cancer treatment and for diagnostic purposes · health risks include cancer, genetic mutations, death The electromagnetic waves described as both beneficial and detrimental to human health are waves. A) UV B) beta C) gamma D) infra red

Arotating space station is said to create “artificial gravity”—a loosely-defined term used for an acceleration that would be crudely similar to gravity. the outer wall of the rotating space station would become a floor for the astronauts, and centripetal acceleration supplied by the floor would allow astronauts to exercise and maintain muscle and bone strength more naturally than in non-rotating space environments. if the space station is 200 m in diameter, what angular velocity would produce an “artificial gravity” of 9.80 m/s^{2} 2 at the rim?