Un copil care merge pe jos pe calea ferata vede trecand, in decursul unui anumit interval de timp, prin dreptul sau un tren. Acest interval de timp este mai lung Cand copilul merge in acelasi sens cu trenul ori daca se deplaseaza in sens contrar acestuia?

In one or two sentences, describe how you did in the balancing game. in a few more sentences, explain one strategy you learned for balancing more complex equations.

Positive ions differ from neutral atoms in that

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.