The diagram on the right represents a block with two applied forces on it. Ignoring friction, how much force pulls this block to the left? A. 120N
B. 360N
C. 630N
D. 720N
*to clarify, the numbers in the picture, going top to bottom, are 310N, 35 degrees, 25 degrees, and 410N

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.