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1. A large rocket engine delivers hydrogen at 1500°C and 3 MPa to a nozzle with an exit pressure equal to the ambient pressure of 54 kPa. If the thrust of the rocket is 2 MN what is the exit velocity and mass flow rate of hydrogen? (use k = 1.41 and R = 4124 J/kgK)
2. Air, with a stagnation condition of 450 K and 250 kPa flows through a nozzle. At the location where the cross-sectional area equals 15 cm2 there is a normal shock. If the mass flow rate is 0.4 kg/s estimate the Mach number and the stagnation pressure after the shock.
3. A 5-mm capillary tube is used as a viscometer. When the flow rate is 0.71 m3/hr, the measured pressure drop is 375 kPa/m. Estimate the viscosity of the fluid? Is the flow laminar? Can you estimate the density?
4. Hydrogen at 20 °C and 1 atm needs to be pumped through an 85 m duct with an aspect ratio of 5:1. The flow rate is 0.7 m3/s and the pressure drop cannot exceed 80 Pa. What should the height and width of the duct be?
a mass of 2.4 kg of air at 150 kpa and 12ordmc is contained in a gas-tight frictionless piston-cylinder device. the air
The acceleration of a particle is defined by a=Kt2. Knowing that v=-4 m/s at t=0, and v=20 m/s at t=4, determine the constant K. Determine the equations of velocity and position, knowing that x=4m when t=6s.
refrigerant 134a enters a compressor operating at steady state as saturated vapor at -8 degress celcius and exits at a
A train accelerates uniformly along a straight track and passes three trackside markers. The distance between the first two markers is equal to 0.25 km and between the second and third the distance is 0.4km
Compute the average density of a solid solution which contains 10 kg of gold, Ag, and 90 kg of silver, Au. The density of pure gold is 19.32 g/cm3 and the density of pure silver is 10.49 g/cm3
air at 1 bar and 20 degrees c is compressed isentropically to 20 bar pressure. for both a and b assume that air is an
a cylinderpiston arrangement contains water at 105 c 85quality with a volume of 1l. the system is heated causing the
a bar of steel has the minimum properties se40 kpsi sy60 kpsi and sut80 kpsi. the bar is subjected to a steady
The 8-lb block slides in a frictionless slot that lies in the vertical plane. The stiffness’s of springs A and B attached to the block are kA =40 lb/ft and kB= 20 lb/ft. When the block is in position 1, spring A is compressed 0.5 ft and spring B is u..
Calculate the percentage power saving when the carrier and one of the sidebands are suppressed in an AM wave modulated to a depth of 100 %.
2 instructors grade on a the curve that is give a fixed percentage of each various leter grades to each of their
Kerosene at 20°C flows at 18 m3/h in a 5-cm-diameter pipe. If a 2-cm-diameter thin-plate orifice with corner taps is installed, what will the measured pressure drop be, in Pa?
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