Answer:
Explanation:
From the given information:
Water freezing temp. ![T_L = 32 ^0 \ F](https://tex.z-dn.net/?f=T_L%20%3D%2032%20%5E0%20%5C%20F)
Heat rejected temp ![T_H = 72 ^0 \ F](https://tex.z-dn.net/?f=T_H%20%3D%2072%20%5E0%20%5C%20F)
Recall that:
The coefficient of performance is:
![COP_{ref} = \dfrac{T_L}{T_H - T_L} \\ \\ = \dfrac{32+460}{(72 +460) -(32+460)} \\ \\ =\dfrac{492}{532 -492} \\ \\ = \dfrac{492}{40} \\ \\ COP_{ref} = 12.3](https://tex.z-dn.net/?f=COP_%7Bref%7D%20%3D%20%5Cdfrac%7BT_L%7D%7BT_H%20-%20T_L%7D%20%5C%5C%20%5C%5C%20%20%3D%20%5Cdfrac%7B32%2B460%7D%7B%2872%20%2B460%29%20-%2832%2B460%29%7D%20%5C%5C%20%5C%5C%20%3D%5Cdfrac%7B492%7D%7B532%20-492%7D%20%5C%5C%20%5C%5C%20%3D%20%5Cdfrac%7B492%7D%7B40%7D%20%5C%5C%20%5C%5C%20COP_%7Bref%7D%20%3D%2012.3)
Again:
The efficiency given by COP can be represented by:
![COP = \dfrac{Q_L}{W} \\ \\ W = \dfrac{Q_L}{COP} \\ \\ W = \dfrac{2000 \ lbm \times 144 \ Btu/lbm}{12.3} \\ \\ W = 23414.63 \ Btu](https://tex.z-dn.net/?f=COP%20%3D%20%5Cdfrac%7BQ_L%7D%7BW%7D%20%5C%5C%20%5C%5C%20W%20%3D%20%5Cdfrac%7BQ_L%7D%7BCOP%7D%20%5C%5C%20%5C%5C%20W%20%3D%20%5Cdfrac%7B2000%20%5C%20lbm%20%5Ctimes%20144%20%5C%20Btu%2Flbm%7D%7B12.3%7D%20%5C%5C%20%5C%5C%20W%20%3D%2023414.63%20%5C%20Btu)
Finally; the power input in an hour can be determined by using the formula:
![Power= \dfrac{W}{t} \\ \\ Power = \dfrac{23414.63 \ Btu}{ 1 \ hr} \\ \\ Power = \dfrac{23414.634 \times 1055.056 \ J}{1 \times 3600} \\ \\ Power = 6.86 \ kW](https://tex.z-dn.net/?f=Power%3D%20%5Cdfrac%7BW%7D%7Bt%7D%20%5C%5C%20%5C%5C%20%20Power%20%3D%20%5Cdfrac%7B23414.63%20%5C%20Btu%7D%7B%201%20%5C%20hr%7D%20%5C%5C%20%5C%5C%20%20Power%20%3D%20%5Cdfrac%7B23414.634%20%5Ctimes%201055.056%20%5C%20J%7D%7B1%20%5Ctimes%203600%7D%20%5C%5C%20%5C%5C%20%20Power%20%20%3D%206.86%20%5C%20kW)
In hp; since 1 kW = 1.34102 hp
6.86kW will be = (6.86 × 1.34102) hp
= 9.199 hp
It’s D. This is because having oil changes often, makes the care for your car better. I hope this helps.
Answer:
if ur mad you may drive faster if ur sad u may drive slower due to the amount of adrenaline and dopamine levels in your body in that given moment
Explanation:
Answer:
At the point when the quantity of bit strings is not exactly the quantity of processors, at that point a portion of the processors would stay inert since the scheduler maps just part strings to processors and not client level strings to processors. At the point when the quantity of part strings is actually equivalent to the quantity of processors, at that point it is conceivable that the entirety of the processors may be used all the while. Be that as it may, when a part string obstructs inside the portion (because of a page flaw or while summoning framework calls), the comparing processor would stay inert. When there are more portion strings than processors, a blocked piece string could be swapped out for another bit string that is prepared to execute, in this way expanding the use of the multiprocessor system.When the quantity of part strings is not exactly the quantity of processors, at that point a portion of the processors would stay inert since the scheduler maps just bit strings to processors and not client level strings to processors. At the point when the quantity of bit strings is actually equivalent to the quantity of processors, at that point it is conceivable that the entirety of the processors may be used at the same time. Be that as it may, when a part string hinders inside the piece (because of a page flaw or while summoning framework calls), the relating processor would stay inert. When there are more portion strings than processors, a blocked piece string could be swapped out for another bit string that is prepared to execute, along these lines expanding the usage of the multiprocessor framework.
Answer:
I'm pretty sure it's letter d