La medida del ángulo complementario, del ángulo cuya mediad angular es 390 57, 4,,​

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 1.90

Acertain radio station broadcasts radio waves that have a wavelength of 298cm what is its broadcast frequency?

What is friction? how does it affect the motion of an object?