Engineering, 17.12.2021 02:30 justintsmith6415
A 1-mCi point source of 137Cs is located at the center of a sphere of concrete. The sphere has a diameter of 10 cm. The source emits photons of energy 0.662 MeV with a frequency of 0.845 per decay. (a) What is the total interaction coefficient of the concrete at the source photon energy
Answers: 2
Engineering, 04.07.2019 18:10
Which of the following controllers anticipates the future from the slope of errors over time? a)-proportional b)-on/off c)-integral d)-derivative.
Answers: 2
Engineering, 04.07.2019 18:20
Avolume of 2.65 m3 of air in a rigid, insulated container fitted with a paddle wheel is initially at 264 k, 5.6 bar. the air receives 432 kj by work from the paddle wheel. assuming the ideal gas model with cv = 0.71 kj/kg • k, determine for the air the amount of entropy produced, in kj/k
Answers: 2
Engineering, 04.07.2019 18:20
A2-m rigid tank initially contains saturated water vapor at 100 kpa. the tank is connected to a supply line through a valve. steam is flowing in the supply line at 600 kpa and 300 c. the valve is opened, and steam is allowed to enter the tank until the pressure in the tank reaches the line pressure, at which point the valve is closed. a thermometer placed in the tank indicates that the temperature at the final state is 200°c. determine (a) the mass of steam that has entered the tank (b) the amount of heat transfer.
Answers: 3
Engineering, 04.07.2019 19:10
What is the main objective of using reheat rankine cycle?
Answers: 3
A 1-mCi point source of 137Cs is located at the center of a sphere of concrete. The sphere has a dia...
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