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Determine the final temperature and the specific work done during this process assuming a) constant specific heats, and b) variable specific heats for air.
A particle has a position vector given by r = (38t) + (46t - 4t2) , where r is in meters and t is in seconds. Find the instantaneous-velocity and instantaneous-acceleration vectors as functions of
A tank full of water that is 15 ft high and 10 feet in diameter has a hole in the bottom two inches in diameter what is the initial flow rate in gpm of the tank?
Assume that the internal energy and specific volume of water do not change from the entrance to exit. The specific volume of water is equal to 0.001 m3/kg. Calculate the horsepower required to opera
If the air exits to the atmosphere where the pressure is 85 kPa and temperature of 0°C, find a) the exit velocity, and b) the exit diameter.
What is the total work done to the system (steam)? What is the internal energy change of the system (steam)? Assume a quasi-equilibrium process.
Determine the initial state and the end state of the gas (use pressure and volume as the two properties). Do you think that the process is quasi-equilibrium?
Neglecting any other losses in the various components, calculate the total turbine power output. If the plant cycle is 100% thermal efficient, what will be the turbine power output?
How much heat is carried away from the space containing the food inside the refrigerator if the internal energy of the refrigerator (the solid structure) is unchanged during the process?
How many photons-water interactions occur in one second in one cm^3 of the water? (b) How many positrons are produced per second in one cm^3 of the water?
It is known that the normal stress is 68 MPa, and the shear stress is -100 MPa. Use Mohr's circle to solve the following. Find the max tensile stress, max compressive stress and maz shear stress in th
The system contains a sharp-edged entrace, 6 threaded 90 degree elbows, and a sharp edged exit. Determine the required pipe diameter for the given flow conditions. Assume the SG of the liquid=1.0.
Determine an appropriate value for the rod's diameter to meet these two requirements. Round up to the nearest millimeter when reporting your answer.
Graphically determine the location of a fixed pivot for a single pivoting link that permits the motion listed. Determine the degree that the link must be rotated to move from position 1 to position
The loading produes a gross nominal tension stress of 45 MPa perpendicular to the plane of the crack tip. Calculate the stress intensity factor at the crack tip.
Two 10 inch gears are to be mounted 12 inches apart and have a velocity ratio of 5:1. Find the pitch diameters and the number of teeth on both gears.
The liquid condensate is removed from the system at 60o F. The air is then reheated until a final state of 80 oF and 40% relative humidity is reached. Determine the mass flow rate of the condensate
Determine (a) the maximum temperatureand pressure that occur during the cycle, (b) the net work output, (c) the thermal efficiency, and (d) the mean effective pressure for the cycle.
The density of liquid oxygen at 95 K is around 500 kg/m3. If the emissivity is increased to 0.9, do you think the evaporation rate will decrease or increase?
The power output of the heat engine is 180 kW. Determine the reversible power and the irreversibility rate for this process.
Calculate stoichiometric A/F ratiop of benzene (c6H6). in an actual combustion of benzene the air'fule ratio was 12/1. calculate the analysis of the wet products of combustion.
Hydrogen at 25 bar, 450°C enters an adiabatic turbine and expands to 2 bar, 160°C with a mass flow rate of 0.2 kg/s. For a dead state of To= 25°C, Po = 1 atm.
Determine the (a) work in kJ, (b) the change in exergy of the air in kJ, and (c) the amount of exergy destroyed, in kJ. Kinetic and potential energy effects can be ignored and the dead state is To=
For the diffuser shown in the attached image, Find the mass flow rate and the average velocity of the air at the exit of the diffuser. For air, let density = 1.194 kg/m^3.
How many people in the U.S. might be expected to die each year as a result of cancer caused by natural background radiation (excluding radon lung exposures)?