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The pressure and temperature ratios across a given portion of a shock wave in air. Calculate the change in entropy in units of (a) (ft . lb)/(slug . degree R) and (b) J/(kg . K).
In the reservoir of a supersonic wind tunnel, the pressure and temperature of air are 10 atm and 320 K, respectively. Calculate the density, the number density, and the mole-mass ratio.
The relationship between pressure and volume during the process is pV = constant. Sketch the process on a p-V diagram and determine the work, in kJ.
Assume you can measure the weight of the king's crown in air, Wa, and the weight in water, Ww. Express the specific gravity of the crown as a function of these measured values.
Evaluate the work transfer (in kJ) if (a) n = 0, (b) n = 1, (c) n = 1.4, and (d) plot a p-V diagram for each processes and show the work by shaded areas.
Determine the capillary height changes in these two fluids when they are in contact with air in glass tube of diameter .55mm. Contact angles are 0 degrees for water and 130 degrees for mercury.
Determine the amount of carbon monoxide formed in lbm, and find the chemical equation for this reaction on a lbmole basis.
The water is brought to the vapor state at 300oC and 1,500kPa, where its internal energy is 2, 784.4 kJ kg^-1 and it's specific volume is 169.7 cm^3 g^-1. Calculate deltaU and deltaH for the process
Pneumatic nail gun uses .02 ft3 of air, at least 100 psia, and 1 btu of energy per nail. What is the max pressure and volume of the tank?
The two tanks are allowed to reach equilibrium, and the final pressure is measured to be 400 psia and temperature is 60oF. What is the volume of the second tank?
Calculate h at the trailing edge (a) if the fluid is water; (b) if the fluid is glycerin (h = 34G W/m2K). (c) Compare the drag forces in the two cases. [There is 23.4 times as much drag in the glyce
Find (a) the approximate location of the laminar turbulent transition; (b) the overall h- for a 2 m chord; (c) h at the trailing edge for a 2 m chord.
The flow stays laminar until a noisy air compressor is turned on in the laboratory. Then it suddenly goes turbulent. Calculate the ratio of the turbulent h to the laminar h.
It radiates to a night sky whose temperature is -18 degree F, while a 50 degree F breeze blows over it at 1.5 ft/s. Will the water freeze or warm up?
What is the heat transfer rate per unit length if a 10 mm thich layer of calcium silicate insulation (k= 0.05 w/m*k) is applied to the outer surfac of the tube?
For these conditions, what is the force (in units of lbf and N) transmitted to the structure holding the diffuser? Provide both direction and magnitude of the force, and use a picture to help presen
Find the kinetic energy in Btu. If this bullet was fired into 1 lbm of water at room temperature and all of the kinetic energy was converted into increasing the temperature of the water.
The steam exits at a temperature of T2=20 degrees. Find the exit pressure (kPa) and the power produced by the turbine (MW).
If the work output of the engine 1 is twice more than that of engine 2, determine a. the intermediate temperature b. the heat rejected to the cold sink c. the efficiency of each heat engine.
A heat-engine of 32% thermal efficiency is used to drive a refrigerator having coefficient of performance of 5. Determine the heat input into the engine for each MJ removed from the refrigerated spa
Determine a) the modulus of elasticity, b) the engineering stress, c) true stress, d) engineering strain, and e) true strain.
If the local atmospheric pressure is 99.5 kPa, what is the absolute intake manifold pressure in kPa. Show all your steps clearly.
At what rate must the chiller dump energy to the environment in BTU/hr to satisfy the first law of thermodynamics for that device?
A machinable grade of aluminum is to be milled on an NC machine with a 20 mm diameter four tooth end miling cutter, Cutting speed = 120 m/min and feed = 0.008 mm/tooth.
Estimate the flaw size responsible for the failure of a turbine rotor made from high strength steel having a yield strength of 1660 MPa and a fracture toughness of 210 MPm.