Answer:
I would think the answer is color, if the wavelength is within the visible light spectrum. This could be answered in different ways but I'm pretty sure the answer you are looking for is hue/color.
I think it may be c, 1.7 v. I work with electricity a lot.
If the machine works at a 70% efficiency it must complete 14,000 work out of the 20,000
More dense. if an object takes up volume and is heavy, it has a high density.
D is the answer hope this helped
