Afire engine must lift 30 kg of water a vertical distance of 20 m each second. what is the amount of power needed for the water pump for this fire hose?
p=w/t=fd/t=mgd/t (30)(9.8)(20)/1= 5880 w is that right?

Power is the rate of doing work. It is the amount of energy consumed per unit time. Having no direction, it is a scalar quantity. We express it as follows:

P = W / t
          where W = Fd
                     F = mg

Therefore,

P = mgd / t
P = (30)(9.81)(20) / 1 = 5886 W

1) when you rub your hands together quickly, the kinetic energy is converted to mechanical energy.2) thermal energy from the sun travels to earth as infrared waves.3) energy is transferred through the matter of space by electromagnetic waves. 4) when a match is burned, chemical potential energy is converted to thermal and radiant energy. 5) seismicwaves are caused by back and forth movement , or vibration, of an object. 6) mechanicalenergy in an engine changes thermal energy into kinetic energy to make a car move.

You get 6 for mechanical