In an industrial cooling process, water is circulated through a system.  If water is pump from the first floor through a 6cm diameter pipe with a speed of 0.45m/s under a pressure of 400torr, what will be the pressure on the nest floor 4m above into a pipe with diameter 2cm?

Shown below is the water jet flow from a pressurized closed tank. The vertical distance between free surface and the jet nozzle is .   The vertical distance between the highest point of the water jet and the jet nozzle is  . The flow is steady and no energy loss is involved. The acceleration due to gravity is . The water's specific gravity is . Find the correct simplified Bernoulli's equation for point 1 and point 3________

As seen in the figure, the vacuum pump provides air flow in an insulated pipe with a cross section of 45.7 mm2. The air moves along a straight line in a room with a pressure of 100,57 kPa and a temperature of 25,7 oC. If the pressure in section 1 is 98,57 kPa and the temperature in section 2 is 15,7 oC; This is Fanno flow. i) Calculate mass flow rate, ii) Calculate at section 1, flow velocity U1, density, Mach number Ma1, Re, f values iii) Calculate  at section 2, find the stopping pressure and temperature, Mach number Ma2, U2 velocity, density, mass flow rate iv) Calculate friction coefficient and force on the channel walls between section 1 and 2. Solve the problem by making the necessary assumptions. v) Calculate L1-2 pipe length

h. Thirty (30) liters/second of stream water must be pumped up a vertical height of 12 meters to irrigate a farm. If head loss in casing and pump results in 62% pump efficiency and the electric motor used has 91% efficiency, what horsepower rating should the motor have and how many kilowatts will it use while pumping?