In creating a schematic diagram, voltage potentials are drawn with the highest voltage at the ____ of the diagram and the lowest at the ____.
A. top, bottom
B. bottom, top
C. left, right
D. right, left
Answer: A
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The percentage of agriculture-related jobs in the total work force is about _____ percent
a. 17 c. 12 b. 33 d. 22
A temporary diversion has been constructed on a highway of +4% grade due to major repairs that are being undertaken on a bridge. The maximum speed allowed on the diversion is 20 mi/h. Determine the minimum distance from the diversion that a road sign should be located informing drivers of the temporary change on the highway. Assume that a driver can read a road sign within his or her area of vision at a distance of 30 ft for each inch of letter height.
Speed limit on highway = 65 mi/h Letter height of road sign = 8 inches Perception-reaction time = 2.5 sec What will be an ideal response?
A) Find ?H and ?S for the gas as it travels through the compressor, and also find the amount of work Ws done by the compressor per mole of gas. B) The gas leaving the compressor is then condensed, after which it goes through a throttling valve that drops the pressure back to 0.3 atm, and then returns to the boiler. Find the amount of heat removed in the condenser (QH) per mole of refrigerant and the coefficient of performance of this refrigerator. C) What would be the coefficient of performance of a CARNOT refrigerator that operated between 275 K and 330 K?
A refrigerator operates according to the vapor-compression cycle. The amount of heat added in the boiler is 6500 Joules per mole of refrigerant. The vapor leaving the boiler is an ideal gas with a constant CV*=(5/2)R. This gas enters the compressor at P=0.3 atm and T=275 K and leaves at P=0.5 atm and T=330 K.
Two-stroke cycle engines are usually quieter than four-stroke cycle engines
Indicate whether the statement is true or false