Water is pumped from a stream at the rate of 90kg every 30s and sprayed
unto a farm at a velocity of 15m/s. Calculate the power of the pump

The power of the pump is 337.5 W.

Explanation:

Power is the rate of transfer of energy or the rate at which work is done. It is measured in watts (W).

                       Power =

But the energy here is the kinetic energy (K.E), which is the energy possessed by a moving body or object.

           K.E = m

where m is the mass = 90 kg and v is the velocity = 15 m/s.

    K.E =   × 90 ×

         = 10125 Joules

  K.E = 10125 J = 10.125 KJ

So that the power of the pump when t = 30 s is;

              Power =

                         = 337.5 W

The power of the pump is 337.5 W.

hi there!

your question asks at which segment does freezing occur.

since we're talking about water, the freezing point of water will be 32 degrees fahrenheit or below.

hope this ! ~