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Construct the radial hardness profiles to scale for the following a 50-mm (2-in) diameter cylindrical specimen of an 4340 steel alloy that has been quenched in moderately agitated oil.
A permanent magnet DC motor is coupled to a load through a gearbox. If the polar moments of inertia of the rotor and load. What is the max acceleration that the motor can produce in the load?
The coefficient of restitution is e=0.7 between the block and the sphere. Determine after impact:(a) the velocities of A and B, and (b) the distance x traveled by block B.
Determine the average force on the wall in lbs. The deceleration rate in ft/s2, and the time period of decceleration in seconds.
Knowing that the coefficient of friction is uk=0.3, determine how far the package will travel own the ramp in 5 seconds.
What are the mole and mass fraction of water at the air side of the interface? At the water side of the interface?
The cylinder and hub have a total mass of 30 kg and a radius of gyration of 0.5 m. Assume no slippage. Determine the acceleration of the mass center of the cylinder and hub when P= 90 N.
Calculate the speed it reaches if it starts from rest and accelerates uniformly for 40 seconds. Speed should be in RPM.
A single mixed stream exits at 1 bar. cp,i for air and helium is 1.005 and 5.193 kJ/kg.K, respectively. Determine for the control volume the temperature of the exiting mixture.
Determine the temperature at which condensation begins. [T=101C] Based on the calculations, is there any condensate formed during the process?
If the power output is 5 MW, determine: (a) the mass flow rate of the steam flowing through the turbine, (b) the thermodynamic efficiency of the turbine.
It is desired to redue this by a factor of 100 while maintaining the inside temperature at -30 degrees F. Find the appropriate insulation thickness in inches.
Condenser pressure is 0.1 bar. Assuming that the isentropic efficiency of the turbine is 0.92 and that of the pump is 0.95. Calculate the net work output per kg of steam.
What is the heat transfer rate of nitrogen through the compressor assuming the process is a) isentropic, b) polytropic with n=1.3, and c)isothermal.
Knowing that the allowable maximum shearing stress in shaft AE is 9000 psi determine the smallest permissible diameter of shaft AE. Where PG (hp) is 10, f (rpm) is 1000.
A crate in the back of a truck with an open tailgate has impending sliding as the truck accelerates from rest to 60 mph in 10 seconds on a horizontal surface.
The maximum temperature is 1200 K and the minimum temperature is 290 K. The minimum and maximum pressures are 95 and 380 kPa, respectively. Calculate the power output of the turbine.
The maximum temperature is 2500 K. Determine the thermal efficiency and the mean effective pressure for the cycle.
The compression ratio is 13.5 and the maximum pressure is 50 bar. The initial conditions are 1 bar and 20oC. Calculate the temperature, specific volume and pressure at the beginning of each process.
Mathematics 2, Mathematics 2,
Mathematics 2,
The remaining steam continues expansion with an isentropic efficiency of 0.80 the condenser pressure of 0.05 bar. Plot the cycle on T-S and H-S diagrams then find the extraction pressure of the wate
If only one extraction from the turbine occurs at 10 bar, what percentage of the total flow to the turbine is ideally extracted? Calculate the amount by which the turbine work is changed.
A steam power plant utilizing the Rankine cycle has the following particulars. Compare the efficiency of the plant with that of the corresponding Carnot cycle.
The appropriate pumps are used for the water leaving the condenser and the feed water heater. Calculate the cycle thermal efficiency and the net work per kg of steam.