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Determine the pressures at state 2 and 3. Determine the change in specific internal energy, u, for each of the two processes.
Determine the water depth h if the resultant hydro static force of the water acts 2.5 ft above the bottom of the gate. Determine the magnitude of this force and what is the force that the hing puts
If electricity is valued at $0.08 per kW*h, what is the cost of the electrical input to the resistor for 20 min of operation?
Given that T_F=800K, T=293K, T_S=265K and Q_house=40kJ/h, determine Q_F utilizing heat pump technology. No other sources of energy may be used.
A certain alloy has a melting temperature of 1300 degree C. What is the minimum temperature that must be achieved for a forging operation on this material to be called hot working?
If failed batteries are immediately replaced, what is the probability of more than one failure occurring during the first 5 hours of operation? Would you expect batteries to have a constant failure r
Find the maximum torque that can be applied to the tube if shear stress is limited to 6000psi. For this torque compute the angle of twist of the tube over a length of 6.5 feet.
Calculate the work done on the atmosphere. Does the reversibility approximation over-estimate or under-estimate the actual work?
Calculate the pressure and temperature as a function of time. How long does it take until the tank is within 5 K of the steady-state value?
Determine the acceleration of each plate when the three horizontal forces are applied. The three plates are stacked on top of eachother, the bottom plate has a horizontal force.
The plate length in the direction of flow is 0.305 m and its temperature is 333.2K. Calculate the heat-transfer coefficient assuming laminar flow.
A steam-driven piston/cylinder is used to catapult jets from aircraft carriers. What is the minimum required steam-catapult piston volume to supply the other part of the necessary energy?
A tensile test of 70-30 brass produced the following data (none of these readings was taken at maximum load). Calculate maximum engineering strain during the test.
Sketch a p-8 and a T-8 diagram for the process. Find the nal T, p, v, u, and x. Find the work done by the water. Find the net heat transfer for the process.
A 10 mm diameter rod of 3003-H14 aluminum alloy (E = 70 GPa, Yield = 145 MPa, Tensile = 150 MPa, Poisson's ratio = 0.33) is subjected to a 5,850 N tensile load. Calculate the diameter of the rod in
The friction head loss is 10 m per 1 km of pipe. It is planned to place pumping stations every 15 km along the pipe. Estimate the horsepower that must be delivered to the oil by each pump.
Steam at 20 bars is in the saturated vapor state (call this state 1) and contained in a piston-cylinder device with a volume of 0.03 m3. Determine the change in specific internal energy, u, for each
Assuming the specific heats of air are constant (at the 300 K values) determine the final temperature of the air. Determine the final pressure in the tank.
The vector F is directed 115° from the x-axis and 65° from the y-axis. At what load F will the force along the bar exceed 300 lb?
The surrounding air is at 80F, and the convection heat transfer coefficient is 8 btu/h.ft^2.F, determine the percent increase of heat transfer for the finned pip over that of unfinned pipe.
Determine the change in specific internal energy that occurs during the process using (a) the compressed liquid table for the second state and (b) the incompressible substance approximation.
Determine the rise in the water temperature after 1 minute of operation, assuming the initial temperature of the water is 20 C and the pressure is 1 bar. answer = 5 degrees C.
You can assume that the engines of the F/A-18 supply 65% of the take-off power. What is the minimum required steam-catapult piston volume to supply the other part of the necessary energy?
When a 4-cylinder car is brought in for a tune up the number of cylinders that have low compression is between 0 and 4. What is the standard deviation for cylinders with a problem?
Determine the percent error in using the ideal gas model to determine the specific volume of Water vapor at 2000 lbf/in^2 , 700°F. Explain why the percent error is low or high in each case.