Agamma ray with wavelength 1.0 x 1013 meters is passing through empty space. (a) what is the frequency of this gamma ray? ytravel from the sun to jupiter(adistance of 7.8 x 108 km)? 21 suppose that you are viewing a very pure green light. (a) in order to make it appear a very pure red light, one would (select one choice from each set): (increase/decrease) the light wave's (amplitude/frequency/saturation) (b) in order to make it appear a less pure green color (a pastel green for example), one would: (increase/decrease) the light wave's (amplitude/frequency/saturation)

Crowbar of 5 metre is used to lift an object of 800 metre if the effort arm is 200cm calculate the force applied

What are two different ways you could find the value of a? explain these methods.

People with normal vision cannot focus their eyes underwater if they aren't wearing a face mask or goggles and there is water in contact with their eyes. in a simplified model of the human eye, the aqueous and vitreous humors and the lens all have a refractive index of 1.40, and all the refraction occurs at the cornea, whose vertex is 2.60 cm from the retina. with the simplified model of the eye, what corrective lens (specified by focal length as measured in air) would be needed to enable a person underwater to focus an infinitely distant object? (be careful-the focal length of a lens underwater is not the same as in air! assume that the corrective lens has a refractive index of 1.62 and that the lens is used in eyeglasses, not goggles, so there is water on both sides of the lens. assume that the eyeglasses are 2.05cm in front of the eye.)