A(n) reaction is the rearrangement of atoms by breaking and reforming chemical bonds.

chemical
physical
boiling
vaporization

Which simple machine is not part of this compound machine? a. lever b. pulley c. inclined plane d. wheel and axle

How does the entropy of steam compare to the entropy of ice?

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.