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Heat is transferred to the water such that the temperature in the tank remains constant. Determine the amount of heat that must be transferred by the time one-half of the total mass has been withdra
A cylinder fitted with a piston contains 5 Lbm of saturated liquid water at 300 Lbf/in^2. Heat is slowly transferred to the system in a constant pressure process until the temperature reaches 600 de
Determine the rate at which energy is removed by heat transfer from the refrigerated space, in kW, and the refrigerator's coefficient of performance.
Calculate the force necessary to accelerate a 20 kg, 400mm diameter sphere which is at rest under water at the rate of 5 m/s2 in the horizontal direction. Use ρwater = 1000 kg/m3.
Heat transfer occurs from the steam to its surroundings at a rate of 19.59 Btu/lbm of steam flowing. Neglecting potential energy effects, determine the exit pressure in psia.
The fibers have an outside diameter of 85 μm and an inside diameter of 42 μm. The average flow through the tubes is 2*106 cm3 in one day and the feed pressure is 3*106 N/m2.
In a Brinell hardness test, a 1500-Kg load is pressed into a specimen using a 10-mm diameter hardened steel ball. The resulting indentation has a diameter = 3.2 mm
Two tubes are available for a particular application: (1) 4.0 cm diameter circular tube and (2) 4.0 cm square tube. Calculate the heat transfer for both geometries if the length of each tube is 1 mete
In a tensile test on a metal specimen , true strain = 0.08 at a stress = 265 MPa . When true stress = 325 MPa, true strain = 0.27. Determine the strength coefficient and the strain -hardening expon
The outer surface of a grill hood is at 47 degrees Celsius and the emissivity is (0.93). the heat transfer coefficient for convection between the hood and the surroundings at 27 degrees celsius is 1
Find (a) the heat transfer in the heat exchanger (kW) (b) the power output of the turbine (kW). Explain thought process and tables used.
A small high speed turbine operating on compressed air produces a power output of 100 W. The inlet state is 4 bar, 50 degrees C, and the exit state is 1.5 bar, -30 degrees C.
A nozzle receives 0.1 kg/s of steam at 10 bar and 400 degrees C with negligible kinetic energy. The exit is at 5 bar and 350 degrees C, and the flow is adiabatic. Find the nozzle exit velocity and
A boiler receives a constant flow of 5000 kg/h liquid water at 50 bar and 20 degrees C, and it heats the flow such that the exit state is 440 degrees C with at pressure of 40 bar.
If the compressor consumes 1.9kw of power, determine the minimum power input to the compressor for the same rate of the heat supply
Taking the average thermal efficiency to be 36.2 percent, determine the amount of thermal energy rejected by the coal fired power plants in the UNited States that year.
A 0.6-m-diameter hemispherical plexiglass "bubble" is to be used as a special window on the side of an above-ground swimming pool. The window is to be bolted onto the vertical wall of the pool and f
If the density of air is 1.2 kg/m3 at the inlet and 1.05 kg/m3 at the exit, determine the percent increase in the velocity of air as it flows through the dryer.
The charging current must be limited to 2.0 Amps by placing a resistor in series with the 15 volt source. What resistance will achieve the desired current?
An electric current of 5A passing through a resistor has a measured voltage of 6V across the resistor. The resistor is cylindrical with a diameter of 2.5 cm and a length of 15cm .
Find (a) the heat transfer in the heat exchanger (kW) (b) the power output of the turbine (kW). Please explain thought process and tables used.
An ideal gas undergoes a two-step process. Beginning at state 1, it is pressurized at constant volume to state 2. Then it is isothermally compressed to state 3. Draw the diagram of the process on a
Calculate the room temperature forging force for a solid, cylindrical workpiece made of 5052- O aluminimum that is 3.5in high and 5in.
Determine the location y of the centroidal axis x-x of the beam's cross-sectional area. Neglect the size of the corner welds at A and B for the calculation.
A cylinder having a piston restrained by a linear spring (of spring constant 15 kN/m) contains 0.5 kg of saturated vapor water at 120°C.