Start Discovering Solved Questions and Your Course Assignments
TextBooks Included
Active Tutors
Asked Questions
Answered Questions
During the day, 30 kJ of energy is added to the house in the form of heat transfer. The temperature of the house at the end of the day is 30oC. Find the change in internal energy of the house.
If the pressure in the condensor is 50 kPa regardless of the degree of throttling, calculate the specific work output and the effiency if the steam is throttled to 4 MPa.
Find Boundary layer thickness at 0.25 m from lower edge. Maximum velocity in boundary layer at this location and position of maximum.
The water exits at a point that is 30 feet above the inlet at 200 psia, a velocity of 10 ft/s, and with no significant change in temperature.
Find A) the mass flow rate of the system B) the power output required by the pump C) the thermal efficiency of the cycle.
Determine the maximum shear stress developed in the shaft. The shaft has an outer diameter of 80 mm, and the thickness of the wall of the hollow segment is 10 mm.
A thin plate of copper is suspended in seawater. If the corrosion rate is 0.9 mpy (mils per year) and the plate is a square of dimension 5.0 in. per side, how much weight loss (in mg) is expected i
How much work is produced when the steam pressure of 15 MPa and a temperature of 400Degree celsius undergoes an expansion as it flows through a turbine to a final temperature of 30 degree celsius.
Determine a) the actual thermal efficiency b) the maximum possible thermal efficiency c) the actual rate of heat rejection from this power plant
Calculate the work output of the turbine (kJ/kg), the feed pump work (kJ/kg), the heat rejected in the condenser (kJ/kg).
Calculate (a) the specific heat and work transfers for each process (kJ/kg), and (b) the cycle efficiency. Sketch the cycle on the T-s and h-s diagrams for water.
Determine the net power developed, in kW. the rate of heat transfer to the steam passing through the boiler, in kW. The thermal efficiency.
Estimate the time required to achieve the same concentration at a position 6.0mm from the surface for an identical steel and at the same carburizing temperature.
What are the temperatures at the compressor and turbine exits in °R? What is the thermal efficiency of the cycle?
The air temperature during this process is maintained constant by an electric resistance heater placed in the tank. Determine the electric work done during this process.
The heat generation within the house from people, lights, and appliances amounts to 100 Btu/min. Determine the minimum power input required for this air conditioning system.
The diameter of the pipe is .15 m at the inlet and .1 m at the exit. Calculate the mass flow rate of the steam and its speed at the pipe outlet.
If the rider, with inertia 68 kg starts at a height hi = 4 m and ends up after the first time across the pipe at a height that is 80% of the initial height, what is the force of friction across the
A sphere 10 times larger in diameter than an actual golf ball is used in the wind tunnel study. What speed should be selected for the model to simulate a prototype speed of 50 m/s?
Calculate the total thermal macroscopic cross section in cm-1 for a UO2 fuel pellet of mass density 10.0 g/cm3 containing 4.2 w/o (weight percent) enriched uranium.
What is the volumetric flow rate of the air entering the compressor in ft3/min? What are the temperatures at the compressor and turbine exits in °R? What is the thermal efficiency of the cycle?
Draw the process on a T-s diagram. What is the thermal efficiency of the cycle? What is the mass flow rate of air (lbm/h)? How much net power is developed by the cycle (BTU/h)?
Propose and briefly describe 2 methods to measure the internal corrosion rate of a pressure vessel that contains a liquid of very high electrical resistance.
Calculate the average corrosion rate CPR in mm/yr for the third specimen and the corresponding corrosion current density.
Propose two (2) methods that can be used for this purpose. Explain your choice indicating advantages/disadvantages of the proposed methods.