1. at which position will the bar magnets most likely experience the least magnetic potential energy between them?

a. position 1
b. position 2
c. position 3
d. position 4

2. a positively charged test object is moving toward the positive source charge in an electric field.

a. its potential energy decreases
b. its potential energy increases
c. its potential energy stays the same

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.