Asmall hydroelectric plant has an input water pressure of 85 psi and an output pressure of 3 psi. note that the direction of the water flow is against the pressure drop when the water is causing the turbine to turn. how much work is done by the water when 8500 gallons flow through the turbine?

Determine the time it takes for a satellite to orbit the earth in a circular "near-earth" orbit. the definition of "near-earth" orbit is one which is at a height above the surface of the earth which is small compared to the radius of the earth, so that you may take the acceleration due to gravity as essentially the same as that on the surface. does your result depend on the mass of the satellite?