The nests built by the mallee fowl of australia can have masses as large as 3.4 × 105 kg. suppose a nest with this mass is being lifted by a crane. the boom of the crane makes an angle of 45.0° with the ground. if the axis of rotation is the lower end of the boom, the torque produced by the nest has a magnitude of 3.75 × 107 n•m. treat the boom’s mass as negligible, and calculate the length of the boom.

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.