A child drops a ball from a bridge. The ball strikes the water under the bridge 2.0s later. What is the velocity of the ball when it hits the water

20m/s

Explanation:

Given that :

Time, t = 2 seconds

Using the relation :

v = u + at

a = g is positive (downward)

V = final velocity

u = initial velocity = 0

v = u + gt

v = 0 + 10(2)

v = 20 m/s

it should have an internal chamber and two thermometers sticking out of the top. the internal chamber will also be closed off from the outside.