The time it takes a car to attain a speed of 30 m/s when accelerating from rest at 2 m/s2 is? A) 2 s. B) 15 s. C) 30 s. D) 60 s.

If forces acting on an object are unbalanced, which factors may result fron an unbalanced force? check all that apply

The first law of thermodynamics states that heat added to a system is neither created nor destroyed but is as it changes into other forms of energy.

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.