Answer:
The photoelectric effect occurs only for frequencies above the cutoff frequency, regardless of the intensity.
Explanation:
The photoelectric effect occurs when light is shined on metals such as zinc beyond a certain frequency (the threshold frequency), which causes electrons to escape from the zinc. The electrons which are fleeing are called photo electrons.
Therefore photo electric effect is
The photoelectric effect occurs only for frequencies above the cutoff frequency, regardless of the intensity.
Something is reproducing.
The forklift does no work on the box at all.
And work doesn't have a direction.
The feather's vertical position is determined by
We take the feather's starting position to be the origin, and the downward direction to be positive. Then
so the answer is D.