At what angle above the horizontal is the sun if sunlight reflected from the surface of a calm lake is completely polarized

Spend time observing or thinking about events that involve matter and energy. which events can you explain? which events can’t you explain?

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?

Suppose you plot the distance traveled by an object at various times and you discover that the graph is not a straight line. what does this indicate about the object's acceleration?