What are the answers for the metric prefixes worksheet for 8th graders

Explain why electric current cannot exist if a current doesn't have a voltage source.

Examples of states of consciousness include a. daydreaming b. dreaming during sleep c. hypnosis d. all of the above

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.