How many photoelectrons are ejected per second in the experiment represented by the graph? ((picture)) Express your answer using two significant figures.

points

Explanation:

because growing process had stoped after 4-5 year

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.