Plese i need the answers of the questions above .

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 ?

Which branches of natural science include the study of an organism that lived 10 million years ago

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?