Askydiver jumps out of an airplane. on his way down, he opens up his parachute and he slows down. his hands are very cold, so he rubs them together to warm them

The image shows a pendulum in simple harmonic motion the pendulum starts at a and swing to e

What component of earth’s atmosphere exists entirely as a result of photosynthesis?

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.