The kangaroo stops at a lake for a drink of water and then starts hopping again to the south. Each second, the kangaroo’s velocity increases 2.5 m/s. What is the kangaroo’s acceleration (in meters per seconds squared) after 5 s? Only numerical entry required as question indicated units.

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What are the applications of electromagnetic waves

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.