Which statement describes an atomic nucleus? O An atomic nucleus is negatively charged,
O An atomic nucleus has no electrical charge,
An atomic nucleus consists of mostly empty space,
O An atomic nucleus contains most of the atom's mass,

What properties of a moving object are used in determining the object's energy of motion

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

Why do astronauts in the space shuttle weigh less?