Question

you can squirt water over a greater distance by placing your thumb over the end of a garden house,then by leaving if completely uncovered .explain how this works​

Answer 1

Answer:

There are two reasons for the greater distance travelled by the water emerging from the hose.

By placing your thumb over the end you are increasing the pressure of the water and therefore the kinetic energy imparted to the water at the point of exit which becomes dissipated over the distance travelled.

The water is essentially incompressible - ie, increasing the pressure does not cause it to contract. Therefore, restricting the water flow with your thumb, as opposed to providing a total seal, will still allow the same volume of water to flow out, but with an increased linear velocity through the restricted space. The effect is similar from the change of depth of water flowing along a river: where the water is deep, it appears almost to be static, however, where it’s shallow it acquires a high linear velocity. The total flow in both parts of the river is the same.

Explanation: