All mammals reproduce a. asexually b. sexually c. both sexually and asexually d. none of the above

What happens to light waves from a star as the star moves away from earth?

Astudent pushes a 60-n block across the floor for a distance of 10 m. how much work was done to move the block

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.