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A cylinder-piston arrangement contains 2.5 kg of ammonia at 0.8 MPa and 30 °C (State 1). Define State 3 and find volume (V3) and specific volume (v3) at State 3.
The ball is pulled to one side and released to swing as a pendulum, reaching a speed of 5.5 m/s as it passes through the lowest point. What is the tension in the rope at that point?
Determine the power required to maintain the clean room's temperature by a reversible refrgeration cycle operating between hot and cold reservoir at 55DegF and 80DegF
The power required to service a 400kW cooling load. What would be the coefficient of performance if the compressor had and efficiency of 80%.
Given these conditions, if the line operates for 16.0 hrs., determine the number of good parts produced and the number of parts removed from the line.
If a bar of SAE 1040 is to be turned with a high speed steel tool with a feed of 0.015" per revolution. Estimate the cutting speeds to get tool lives of 60 and 120 minutes.
If the rate of heat loss from the pipe is to be kept around 1000 Watts, determine the depth at which the pipe need to be buried.
If p1V1/T1=p2v2/T2, determine the final temperature, T2. Using the First Law, determine the work (Btu) that occurs, being careful about the mathematical sign.
Determined the rate of energy transfers by mass into and out of the compressor. Assume the Kenetic and potencial energies to be negligible.
Determine the temperature and the total enthalpy in the container. The container is now heated until the pressure is 600 kPa. Determine the temperature and the total enthalpy at this state.
Determine the rate at which energy is discharged to the cooling water, in BTU/Hr. Determine the minimum theoretical rate at which energy could be discharged to the cooling water, in BTU/Hr.
Superheated water at 180 psi and 500 °F is allowed to cool at constant volume until the temperature drops to 250 °F.
Estimate the length of the heat exchanger for a gas flow rate of 0.8 kg/s. You may ignore the tube wall resistance and the flue gas properties are the same as those of air at 700K.
For what range of exit temperatures in C, can the calorimeter be used to determine the quality of the steam in the pipe? What is the corresponding range of steam quality values.
A weightless box with a 0.4m by 0.4m square base is floating horizontally on the water surface. It contains a 0.2m diameter steel sphere located at its center.
Determine the automobile's braking distance from 60 mph when it is (a) going up a 5° incline, (b) going down a 3-percent incline. Assume the braking force is independent of grade.
What is the average velocity at the inlet, in m/s? If conditions are sea level standard, what is the mass flow of air, in kg/s? What is the average velocity at the inlet if the attachment is removed
The reheat pressure is varied from 12.5 to 0.5 MPa. Determine the thermal efficiency of the cycle and plot it against the reheat pressure, and discuss the results.
Assuming the water heater acts as a heat sink having an average temperature of 30°C, determine the minimum power supplied to the heat pump, in kW.
A fire clay brick ( rho = 2000 kg/m2, k= 1.0 W/m-K, Cp = 800 J/kg-K) of dimensions 5 cm. What is the temperature at the center of the brick and at the corners of the brick after 1 hour of cooling?
Determine the temperature at the center point of the cylinder 2 minutes after sudden application of the heat using the lumped method. C. Comment on the appropriateness of each method.
Determine (a) the temperature, (b) the work done by the air on the piston, and (c) the total amount of energy transferred to the air when the piston is in this new position.
Olympic champion Usain Bolt of Jamaica holds the world record for running 100 meters in 9.58 seconds. What was (a) his acceleration during the first 40 meters, and (b) his top speed?
Determine the percentages of heat conduction along the copper (k = 386 W/°C) and epoxy (k = 0.26 W/m °C) layers. Also determine the effective thermal conductivity of the board.
Where are the maximum stress and strain? What deflection will this cause at the end of the beam? Explain clearly why is there no yield strength listed for wood.