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Air enters a one-inlet, one-exit control volume at 6 bar, 500 K and 30 m/s through a flow area of 28 cm2. At the exit, the pressure is 3 bar, the temperature is 456.5 K, and the velocity is 300 m/s.
The partition is then removed, eventually, the entire rigid tank is occupied by saturated water vapor at 22,000 kpa. Determine the amount of heat transferred to the rigid tank ,in kj , for the unres
Determine the heat exchange between the first to the second cycle (kJ/cycle) that occurs at the intermediate temperature. (b) What is the coefficient of performance of each refrigerator? (c) Compute
Determine a) the final temperature of the water vapor in the tank. b) the heat transfer through the tank wall in kj for this process. A mass of 4.0 kg of R-134a at p1=140 kpa and T1= 20 cis containe
What voltage would he measure using his homemade voltmeter and an appropriate thermocouple table (that he also found in the shipwreck) if the object he wished to measure was 200°C? What about if
The convective heat transfer coefficient for the exhaust gases flowing across the tubing s estimated to be 65 W/m2K. If the thermocouple reading is 221 deg C when the stack walls are at 178 deg C de
Determine: a. The cycle efficiency b. The mean temperature of heat addition c. Compare the results for part (a) and (b) for the case of Rankine cycle without regeneration.
Determine if a simple supported W12 x 26 (A36 steel) beam has the capacity to support loads that produce 50ksi of live-load shear and 20ksi of dead-load shear.
If water is available at 95 c and a 0.2kg/s and if the atmospheric temperature is 20 c. a) find the maximum possible thermal efficiency b the maximum possible power output.
Height of 3 in. solidifies in 3 minutes in a sand casting operation. What is the solidification time if the cylinder height is doubled? What is the time if the diameter is doubled?
Estimate the diameter of an aluminum atom, given that the density is 2.7 grams/cubic centimeter and the atomic mass is 26.9815 and a ASTM grain size of 7.
The inertia of each gear is negligible, determine the angular acceleration of Shaft 2. b) Find the optimal tooth no. ratio, N2/N1 for maximal angular acceleration of Shaft 2.
The bike is seldom used. What load rating should be used to ensure with 99.0% confidence that both front-wheel bearings last 3 years? State all significant assumptions.
Calculate the internal energy changes associated with the formation of each vacancy in gold, and compute the fraction of lattice sites that are vacant at the melting temperature.
An oven @ 1300 F at a rate of 300 per min. If the plates remain in the oven until there average temp rises to 1000F, determine the rate of heat transfer to the plates in the furnace.
The balls leave the oven at a uniform temp of 900C and are exposed to air at 25C for a while before they are dropped in the water. If the temp of the balls drop to 850C prior to quenching, determine
The length of pipe is 30 m and contains two elbows with friction equivalent to 20 meters each. Compute the power requirement of a pump. Solution properties include density of 975 kg/m3 and viscosity
It takes an airbus roughly 75 seconds to get to that altitude and during that time it covers 17.5 km. If aviation fuel provides 43 MJ of energy per kg, how much fuel in kg is required?
Or suggest how you might also use the Maxwell relationships with these items for an extra 5 points! Clearly state your assumptions, and provide as much detail on the procedures as possible.
Determine the change in the internal energy of the system per unit mass if the final pressure is 100 kPa. Calculate the work and the heat transfer per unit mass during the process. Assume quasi-equi
100 lb of fluid food is heated by addition of 10,000 Btu of energy. If the food has initial temperature of 40°F, and Cp=0.9 Btu/lb-°F, what is the temperature when it is done heating?
Calculate the concentration of total solids in the hot pulp leaving the operation. The process is conducted at atmospheric pressure. The solids portion of the pulp may be considered to have specific
Steam at 25 psia and 250°F is condensed at its saturation temperature. What is the temperature of the condensate? How much energy is produced by this process?
A new containment vessel for nuclear waste is being tested by a group of engineers working for the U.S. Department of Energy. Find the final temperature and pressure of the argon after the 1 minute co