The process of aerobic respiration is a significant source of which of the following gases?
A) carbon dioxide
B) ammonia
C) oxygen
D) nitrogen
E) methane
A
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Air is located in a piston-cylinder device. Initially, the air is 20oC and the pressure is 200 kPa, while the volume is 0.1 m3.
(a) The air is heated at constant pressure until the volume is 0.3 m3. Determine the heat transfer for the process. (b) For the same initial conditions, use your piston-cylinder device model to generate data, and plot the heat transferred for an isobaric expansion to volumes ranging from 0.15 m3 to 0.50 m3. Given: Air; T1 = 20oC = 293 K; P1 = P2 = P = 200 kPa; V1 = 0.1 m3; V2 = 0.3 m3 Assume: Air behaves as an ideal gas with variable specific heats (expect a large temperature change): R = 0.287 kJ/kg-K; ?KE = ?PE = 0.
The maximum pressure drop for a suction line should not exceed:
A) 3 psi. B) 1 psi. C) A corresponding saturation temperature drop of 2°F. D) 2 psi.
A spacing collar is 0.375" wide. How many inches will 17 spacing collars take up on a shaft?
What will be an ideal response?
With respect to electric water heater load, explain what off-peak metering means.
What will be an ideal response?