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Consider the upper stage of a long narrow rocket used to transfer a satellite from a low-earth orbit to geosynchronous orbit (thus it is out of the atmosphere). Assume a small misalignment of the thrust vector FT from the center line, as shown in Figure 11.33. For large high-thrust solid rocket motors, the rockets are always spun about the long axis. Explain the reason for spinning the rocket stage.
Write a short essay describing your personal perspective on the project team experience so far. To the extent possible, please comment on the following:
What is the average heat flux based on inside area of the tubes? What is the average temperature gradient in the water on the inside surface of a tube
Steam at 5 MPa and 600°C enters an insulated turbine operating at steady state and exits as saturated vapor at 50 kPa. Kinetic and potential energy effects are negligible. Determine the work developed by the turbine, in kJ per kg of steam flowing..
It has been suggested that an independent certification authority should be established. Vendors would submit their components to this authority, which would validate that the component was trustworthy.
If 1 cubic foot is equal to 28.3168 liters and there are 60 seconds in a minute, if a flow rate is 3 cubic feet per minute, how much is it in liters per second?
cooling water enters a cooling tower at a rate of 1000 kgh and 70 degree c. water is pumped from the base of the lower
A fireclay brick cube, 10 cm in length is removed from a furnace where it was maintained at a temperature of 500 degrees C. The brick cube is then placed in ambient temperature conditions.
Comment on how well the forecast is tracking actual demand. Is it lagging or leading actual demand?
The automobile bumper jack is designed to support a 4000-N downward load. Begin with a free-body diagram ofBCDand determine the force supported by rollerC.Note that rollerBdoes not contact the vertical column.
a steel pipe of 12-in outer diamer is fabricated from 14-in-thick plate by welding along a helix that forms an angle of
Two flat, rectangular plates with a lateral dimension w*l lie parallel, one above the other, a distance h apart. The gap between them is filled with molten polymer.
Carbon dioxide enters an adiabatic compressor at 100kPa and 300K at a rate of 0.5kg/s and exits at 600kPa and 450K. Considering constant specific heat, determine (a) isentropic efficiency of the compressor (b) the rate of entropy change in (kW/K) ..
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