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The bottom of a copper pan, 0.3 m in diameter, is maintained at 118°C by an electric heater. Estimate the power required to boil water in this pan. What is the evaporation rate? Estimate the critical heat flux.
the wear resistance of a steel shaft is to be improved by nitrogen hardening of its surface. the initial nitrogen
a hole in an aluminum roof panel is 2.748 cm2 in area at 0.000degc. what is the magnitude of the change to its area
Calculate the change in free-energy associated with the formation of a critical spherical nucleus in pure liquid nickel that is 200 ºC under cooled. Properties of Nickel: Heat of Fusion 2660 J/cm3; Surface Energy 255x10-7 J/cm2 ; Freezing Temperatur..
a peripheral milling operation is performed on the top of a rectangular workpiece that is 650 mm long 50 mm wide and
Air enters a gas turbine with a velocity of 165m/s and a specific enthalphy of 2800KJ/kg and leaves with a velocity of 135m/s and specific enthalpy of 2175KJ/kg. The heat lost to the surrounding turbine is 32.5KJ/kg. Determine power developed by the ..
the suspended load exerts a force F=600 lb at A, and the weight of the bar OA is negligible. Determine the tensions at the cables and the reactions at the ball and socket support O
What is the function of the system -
assume that the flow of air through a given duct is isentropic. at one point in the duct the pressure and temperature
a thermometer is initially at a temperature of 70degf and is suddenly placed in a liquid which is maintained at
The landing gear on a commercial aircraft experiences an impulse load upon landing. Assuming seven such landings per day on average, how long would it take before the landing gear has been subjected to 108 load cycles? (Answer in years)
We have learned about the existence of many types of toxic chemicals in water, such as heavy metals and persistent organic pollutants. You are asked to select a toxic chemical of interest as your investigation target, study its toxic impact, conve..
water at 1.5 mpa 150degc is throttled adiabatically through a valve to 200 kpa. the inlet velocity is 5 ms and the
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