A shadow from a surgeon's hand obstructs your view while operating. Make suggestions for an alternative light source that avoids this difficulty. Check all that apply. Check all that apply.

a. Use several point-like light sources at different positions around the point of interest.
b. Construct a smaller light source.
c. Use an additional point-like light source behind the surgeon.
d. Construct a larger light source.

14. a body is projected with velocity vi from a.at the same time another body is projectedvertically upwards from point b withvelocity v2 lies vertically below the highestpoint. both the bodies collide thenv2÷v1is

If a hiker that weighs 600 newtons climbs a 50 meter hill, how much gravitational potential energy has the hiker gained?

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.