Engineering, 25.04.2020 02:58 googoo4
The superintendent of a national cemetery wants to erect a larger than usual flagpole and flag. The flag pole is 120 ft tall. The flag has a height, H = 18 ft, and a length, L = 36 ft. Assume the flag pole must withstand a wind of 55 mile/hr at 32°F when the flag is flying. The drag coefficient of the flag can be estimated by CD = 0.05L/H. If the pole has a diameter of 8.5 in., determine the total force exerted on the pole. Assume that the pole is a smooth long cylinder and that the total drag is superposition of those for the stand alone flag and pole
Answers: 2
Engineering, 04.07.2019 18:10
Water at 70°f and streams enter the mixing chamber at the same mass flow rate, determine the temperature and the quality of the exiting stream. 0 psia is heated in a chamber by mixing it with saturated water vapor at 20 psia. if both streams enters the mixing chamber at the same mass flow rate, determine the temperature and the quality of the existing system.
Answers: 2
Engineering, 04.07.2019 18:10
Carbon dioxide gas expands isotherm a turbine from 1 mpa, 500 k at 200 kpa. assuming the ideal gas model and neglecting the kinetic and potential energies, determine the change in entropy, heat transfer and work for each kilogram of co2.
Answers: 2
Engineering, 04.07.2019 18:10
Which of the following refers to refers to how well the control system responds to sudden changes in the system. a)-transient regulation b)- distributed regulation c)-constant regulation d)-steady-state regulation
Answers: 1
Engineering, 04.07.2019 19:10
Estimate the change in specific internal energy au and specific enthalpy h from inlet to outlet for ethylene glycol (a liquid) flowing through each of the following devices: (a) a heat exchanger where the glycol temperature increases from 20 °c to 80 °c; (b) a pump operating at about 25 °c and increasing the glycol pressure from 100 kpa to 8 mpa.
Answers: 2
The superintendent of a national cemetery wants to erect a larger than usual flagpole and flag. The...
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