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Determine the inertia force required to move the piston at 6,000 rpm and the required valve spring force when operating at 6,000 rpm.
Estimate the temperature at which the top land (very top of the piston) would be touching the liner that is kept at a constant 100 degrees Celsius by a coolant.
Cooling air at 25oC flows through the fin array with a heat transfer coefficient of 28 W/m2K. Calculate the temperature of the base of the semiconductor. Use k = 175 W/m-K for the aluminum.
At the inlet, the velocity is 40 ft/s and the pressure 15 psia. At the exit, determine the mass flow rate, in lbm/s, and the velocity, in fps.
At some point, the valve between the tanks is opened and the water in the two tanks mix adiabatically. Determine the final state and phase of the mixture after it reaches equilibrium.
What is the mass of the wasted water in lbm? Assume that there are 46,000 drops per gallon and that the density of water is 62.5 lbm/ft3.
Determine (a) the magnitudes of the velocity and acceleration at any instant, (b) the radius of curvature of the path. For (b): Use n-t components of the acceleration.
Steam is cooled at a constant pressure until one half of the mass condenses. show the process on a T-v diagram. Find the final temperture. Also determine the heat transfer and volume change for this
Find the probability that among 10 of the income tax forms randomly selected for audit, 5 will be correct , 3 will contain an error favoring the tax payer.
Determine the pressure and temperature at each point in the cycle and the thermal efficiency. Give a summary table for the ratings for each component of the gas turbine system.
The wind tunnel model is 1/10 the size of the actual column. What should the wind tunnel velocity be, in m/s? Is this an air velocity that will be esay to achieve?
The cross-sectional area at the top of the sprue = 800 mm2, and its length = 175 mm. what area should be used at the base of sprue to avoid aspiration of the molten metal?
The surface of the earth (kg = 1.2 W/mK) is at 300 K, what is the cooling load (W/m) that must be maintained by a cryogenic refrigerator per unit pipe length?
The valve is closed when no liquid is left in the tank and vapor starts to come out. Determine the total heat transfer for this process.
What are some of the factors neglected in the theoretical derivation of the weir flow rate equations that may in fact be of importance?
How much work must be provided, by the resistance heater inside the cylinder, to raise the piston 5 inches? The initial temp is 100 F.
The total running time from A to B is 40 seconds. Draw the a-t, v-t, and x-t curves, and determine the distance between stations A and B.
The temperature is 35.6°C. The pipe has a circular cross-section with a diameter of 0.105 m. Calculate the rate of heat transfer (kJ/s) to the R-22.
Calculate the heat dissipated when the base temperature is 600 K, the fluid temperature is 400 K, and the heat transfer coefficient is 100 W/(m2K). Take k = 180 W/(m K).
Determine the static head efficiency required of the turbine if the total pressure of its exhaust is not to be less than 1.6 bar and the exhaust velcotiy is 300 m/s.
Determine for this machine the slip factor, isentropic efficiency and the Mach number at the diffuser inlet, stating your assumptions. For air Cp=1.0 kJ/kg.K and sp. Heat ratio = 1.4.
The leakage loss is doubled compared with its operation as a pimp. If the head, flow rate and speed remain unchanged determining the power output. Density of water = 1000 kg/m3.
Knowing that G=77.2 GPa for both shafts, determine (a) the maximum shearing stress in shaft CD, (b) the angle of rotation at A.
To what temperature must it be cooled in order to have a 0.029-mm reduction in diameter? The values of Poisson's ratio and linear coefficient of expansion for nickel are 0.31 and 13.3 x 10-6 (°C
150 Btu of energy is transferred as heat to this system, and it is allowed to come to equilibrium. What will be the specific internal energy of the substance in the final equilibrium state?