While the pressure remains constant and 99.7 psia, the volume of air changes from 12 cubic feet to 20 cubic feet. Find the amount of work done on or by the closed system.
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- while the pressure remains constant at 85 psig, the volume of air changes from 12ft^3 to 20ft^3. Find the amount of work done on or by the closed system?Find the work W done if a constant force of 100 lb is used to pull a cart a distance of 210 ft.Based on the figure below, how much water is stored after 25 minutes in each of the tanks? How long will it take to fill the tanks completely provided that the volume of tank (a) is 60 m3 and tank (b) has a volume of 96 m3? Assume the density of water is 1000 kg/m3. Show all your work.
- Find h when the pressure in tank B is 21 kPa.b) A pipeline bends in the horizontal plane through an angle of 45°shown in Figure 6.Thediameter of the pipe changes from 0.6 m before the bend to 0.4 m after it. Water enters the bend at the rate of 0.5 m3/s with a pressure of 150 x 103N/m2. Assuming that there is no loss of energy.i) Determine pressure at the outlet, P2-ii) Calculate the magnitude and direction of the resultant force exerted on the pipe bend by the water.A tank contains 80 ft3 of air at a pressure of 350 psi; if the air is cooled until its pressure and temperature decreases to 200 psi and 70° F respectively, what is the decrease in internal energy?
- In a closed system, the absolute pressure of a gas remains constant at 50 kPa while its volume changed from 20 cm3 to 50 cm3 . Compute the work done.A tank contains 80 ft3 of air at a pressure of 350 psi; if the air is cooled until its pressure and temperature decreases to 200 psi and 70 oF respectively, what is the decrease in internal energy?A pump is used to increase the pressure of water from 105 kPa to 800 kPa at a rate of 160 L/min. If the shaft power input to the pump is 3 kW, the efficiency (expressed in decimals, such as 0.25; don't write 25%) of the pump is ?
- The piston/cylinder device contains 0.4kgof water at a temperature of 1800C and pressure of 0.8 MPa. The water undergoes an isobaric process until it becomes saturated liquid. Find the total work done in the process. Is it work done on the system or by the system? Draw a schematic diagram,andthen plot the state/s and process, whichever is applicable in a t-sdiagramA cylindrical tank with a radius of 3ft is filled with water which has a weight density of 62.4 lb/ft^3. The water is to be pumped to a point 2ft above the top of the tank. (a) How much work is performed in pumping all the water from the tank? (B) How much work is performed in pumping 3ft of water from the tank? (C) At what point is 1/2 of the total work done?A room has a volume of 349 m3. An air-conditioning system is to replace the air in this room every 81.5 minutes, using ducts that have a square cross section. Assuming that air can be treated as an incompressible fluid, find the length of a side of the square if the air speed within the ducts is (a) 2.00 m/s and (b) 7.00 m/s. a: b: