Physics is explicitly involved in studying which of these activities?

A.

the mixing of metals to form an alloy

B.

the metabolic functions of a living organism

C.

the motion of a spacecraft under gravitational influence

D.

the depletion of the atmospheric ozone layer due to pollutants

E.

the killing of cancerous cells by radiation therapy

Ultraviolet radiation is dangerous because it has a high enough energy to damage skin cells. what is the best explanation of the relationship between wavelength and wave energy? a) wave energy is related only to frequency, not wavelength. b) longer wavelengths have lower frequencies but higher energy. c) the shorter the wavelength, the lower the frequency and the higher the energy. d) the shorter the wavelength, the higher the frequency and the higher the energy.