What is the name of the energy that results from the interaction of charged particles?

Alead ball is dropped into a lake from a diving board 5m above the water . it hits the water with a certain velocity and then sink with constant velocity in bottom . it reaches the bottom 5 second after it is dropped if g= 10m/s2 . find depth of the lake and average velocity of the ball ?

Ascientist wants to test ways to reduce pollution in lake . what is the bestway of doing this

The inner planets or call terrestrial because they