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Steam at 35 bar and 600 degree K enters a throttling valve that reduces the steam pressure to 7 bar. Assuming there is no heat loss from the valve, what is the exit temperature of the steam and its
Design considerations limit the maximum normal stress is 74 ksi, th maximum shearing stress is 40 ksi, the maximum normal strain to 2200 uin/in and the maximum shearing strain to 2500 ur ad . What i
Find the time required for the machine to decelerate to 100 mph in standard air. What assumption did you have to make, and was this assumption valid?
At what point on the plate does the flow become transitional? Assume a unit width for the plate. Show the equations you used in addition to your plot.
Determine the terminal velocity of a 75-mm diameter sphere made of solid aluminum (specific weight=26.6KN/m^3) in free fall in (a) castor oil at 25 degrees C, (b) water at 25 degrees C
Oxygen at 100 kPa, 27°C is compressed to 1 MPa in an adiabatic compressor whose isentropic efficiency is 0.80. Calculate the oxygen temperature at the compressor outlet is?
R134a is condensed at a constant temperature of 30°C as it flows through the condenser of a refrigerator by rejecting heat at a rate of 6 kW.
Helium gas expands in an adiabatic turbine from 2 MPa and 750°C to 0.18 MPa at a rate of 1.5 kg/s. Assuming constant specific heats at room temperature, calculate the maximum power output of th
Compute the percentage change in the volume of the oil in the system as the pressure is increased from zero to 3000 psi if the bulk Modulus of the oil is 189000 psi ( 1303 Mpa).
What are the wall temperatures at that location and at the 10. 3 ft location? Calculate the arithmetic-mean temperature difference and the log-mean temperature difference for the heated section.
Two steel (E=30,000 ksi) pipes (1) and (2) are connected at flange B. Pipe (1) has an outside diameter of 6.625 in. The maximum downward load P that may be applied at flange B.
An air conditioner running with R-134a on a cycle executed under the saturation dome between the pressure limits of 0.8 MPa and 0.12 MPa.
A heat pump absorbs heat from the cold outdoors at 3 C and supplies heat to a house at 20 C at a rate of 30,000 kJ/h. If the power consumed by the heat pump is 3 kW, find the coefficient of performa
Determine all of the state points and the efficiency. What is the temperature, pressure, and enthalpy of all states(1,2,2a,2b,3,4)?
In a water heating system, cold water at 5 C flowing at a rate of 5 kg/s is mixed adiabatically with hot water at 80 C flowing at a rate of 2 kg/s, state the assumptions.
Estimate the heat transfer area of the heat exchanger. Assume that the ocean water has the same density and specific heat as those of typical water.
What is the heat supplied to the plant by the steam? If the steam is saturated at 220 C and expands to a pressure of 15 kPa with a quality of 0.85, estimate the flow rate of steam?
Liquid water at 10 deg C is then injected into the container, at a pressure of 2 MPa. How much water must be injected to reduce the pressure in the container of .5 MPa and what would the final quali
Find the lowest mass flow rate at which water could be pumped without freezing. Would this minimum flow rate be higher or lower if the downstream end of the pipe were raised?
Two suppliers manufacture a plastic gear used in a laser printer. Is there sufficient evidence to conclude that variance the impact strength is different for the two suppliers?
Required results: What is the rate of heat transfer Q from the hotter air space to the cooler air space? Find the temperature of the copper plate.
If the bottle on the conveyor of the above problem has a friction coefficient against the conveyor of .2, what is the greatest acceleration the conveyor can have without slipping?
An irrigation pump is used to draw water from a reservoir and deliver it to an irrigation ditch, at a mass flow rate of 15 kg/s. Find the power that must be supplied to the pump.
A heat pump is executed with R-134a under the saturation dome between the pressure limits of 1.6 MPa and 0.2 MPa. If the power consumption of the heat pump is 4.2 kW.
Air at 300 K and 200 kPa is throttled by a valve to pressure of 100 kPa. If the valve is adiabatic and the change in kinetic energy is negligible, calculate the temperature of air after throttling.