Perform the following operations using the significant digits method: A. 33.45 + 0.89
B. 56 X 2

When a book falls from a shelf to the ground without anyone pushing on it, no work is done on the book. true or false

There are weak or strong attractive forces between atoms of liquids with a high viscosity

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