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?

Which statement best explains why an object weight less on mercury than it does on earth

Unpolarized light of intensity i_0=750w/m^2 is incident upon two polarizers. after passing through both polarizers the intensity is i_2=280w/m^2. (a) what is the intensity of the light after it passes through the first polarizer in w/m^2? (b) write an equation for the angle between the polarizers in terms of the initial (i_0) and final (i_2) intensities. (c) find the angle between the polarizers in degrees.

The graph represents the distance a car travels over time while on the highway. which statement about the car's trip is accurate? a) the car does not move over time. b) the car travels at a constant velocity. c) the car's velocity increases constantly over time. d) the car's velocity decreases constantly over time.