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A well-insulate compressor take in air at 80oF at 14.7 psi, with a volumetric flow of 1,200 ft3/min. The compress air exits at 500oF, 120 psi. Determine the size of the motor, in hp, require to run
Find the required length of the pipe if the bulk outlet temperature Tm,o = 40 degree C. Find the pipe wall temperature at the exit.
Heat transfer occurs at a rate of 2 KW from the compressor to its surrounds. Assuming the idea gas model for air and neglecting kinectic and potential energy effects, determine the power input, in K
A pilot tube mounted on a aicraft flying at 2700 m measures a differential pressure of 30mmHg. Assuming a standard atmosphere determine the velocity of the aircraft in km/hr.
How many of the ten gang members would need to "fail" the lie-detector in order for you to be 99% sure of the gang's guilt?
Given that the surface energy, mass density, and molar mass of Ag are respective 1140 erg/cm2, 10.5 g/cm3, and 108 g/mol. Calculate molar volume of Ag at room temperature;
The nitrogen is compressed to ½ of the initial volume in a process such that pV^1.4 = constant. Treat nitrogen as an ideal gas. Calculate the initial volume, VI.
If each unit mass of air passing from inlet to exit undergoes a process described pv^1.3=constant, determine the diameter of the exit pipe, in inches.
Determine how much time is required for the ball to reach a speed 12 ft/s, How far r2 is the ball from the hole when this occurs? Neglect friction and the size of the ball.
Determine the initial acceleration of the boat if it is initially at rest. Assume that air has a constant density of pa = 1.22 kg/m3 and that the entering air is essentially at rest. Neglect the dra
Knowing the coefficient of kinetic friction between B and C is 0.2, determine (a) the velocity of the bullet immediately after passing through B, (b) the final velocity of the carrier.
The only information you have about a proposed site for a wind farm is that the wind blows at speeds above 25 m/s 90 hrs per year. What is the most probable average wind velocity?
A value that causes the 24 hr average velocity to be 20 m/s. At 1900 the wind stops abruptly. What is the maximum energy the windmill can generate in one year?
The water leaves the tube leaves at the 1MPa and 300oC with a velocity of 80m/s. Calculate the 1) volume flow rate at the outlet; 2) mass flow rate at the inlet; and 3) velocity at the inlet.
Calculate the brake kW of the fan if its efficiency is 65% and the gas has a molecular weight of 30.7. Assume incompressible flow.
Determine the maximum spectral emission power of the human and the wavelength at which this emission occurs? What is the wavelength below which 50%of the human emission is concentrated?
Stating any assumptions you make: i) When will the project break even? ii) Draw a cash flow diagram for 3 years from the start of R&D. iii) Compute the present worth of the project.
You plan to continue this for 4 years: i) Draw the cash flow diagram ii) How much will there be in the account at the end of 4 years. Show all work for rating.
Find the temperature of the steam at the inlet of the closed feedwater heater. Mass flow rate of steam extracted from the turbine for the closed feedwater heater, the net power and thermal efficienc
Heat is slowly removed from the steam during a constant pressure process, such that 197.6 kJ of moving boundary work is done by the surroundings on the steam. Determine the quality of the steam at t
A fixed quantity of air at T1 = 60oC and P1 = 158 kPa is heated at constant temperature in a piston-cylinder assembly until its volume has increased by 130%.
A fixed quantity of air at T1 = 100oC and P1 = 243 kPa is heated at constant pressure in a piston-cylinder assembly to T2 = 203oC.
Derive the intersection coordinates, for the first quadrant, for the following curves: a- Modified Goodman with Langer Failure Criteria and with the load line b- Gerber with Langer Failure Criteria.
A 120 mm diameter hole is punched in the center of the plate. What is the factor of safety of the plate under the load conditions?
An undeformed specimen of some alloy has an average grain diameter of 0.04 mm. You are asked to reduce its average grain diameter to 0.010 mm. Is it possible?