GS A 1-cm-thick layer of water stands on a horizontal slab
of glass. A light ray in the air is incident on the water
65° from the normal.

Why does the input force have to be greater than the force needed to lift the bale?

Which pair of quantities includes one quantity that increases as the other decreases during simple harmonic motion?

In a classical model of the hydrogen atom, the electron moves around the proton in a circular orbit of radius 0.053 nm. what is the electron's orbital frequency? what is the effective current of the electron?