Discuss your interpretation of the confidence-precision trade-off, and provide a few examples of how you might make a choice in
1 answer:
You might be interested in
Answer:
A)
B)
C) Second law efficiency 4.85%
exergy destruction for the cycle = 9.3237 kW
Explanation:
Given data:
degree celcius
degree celcius
Power to refrigerator = 9.8 kW
Cp = 3.35 kJ/kg degree C
b)
wil be max when COP maximum
taking surrounding temperature T_H = 20 degree celcius
we know that
c) second law efficiency
exergy destruction os given as
= 9.8 - 0.473 = 9.3237 kW
Answer:
17.658 kPa
Explanation:
The hydrostatic pressure of a fluid is the weight of a column of that fluid divided by the base of that column.
Also, the weight of a column is its volume multiplied by it's density and the acceleration of gravity:
Meanwhile, the volume of a column is the area of the base multiplied by the height:
Replacing:
The base cancels out, so:
The pressure depends only on the height of the fluid column, the density of the fluid and the gravity.
If you have two point at different heights (or depths in the case of objects submerged in water) each point will have its own column of fluid exerting pressure on it. Since the density of the fluid and the acceleration of gravity are the same for both points (in the case of hydrostatics density is about constant for all points, it is not the case in the atmosphere), we can write:
We do not know at what depth the man of this problem is, but it doesn't matter, because we know the difference in height of the two points of interes (h1 - h2) = 1.8 m. So:
Answer:
Work input =283.47 KJ
Explanation:
Given that
T=12°C=285 K
m= 2.5 kg
Given that this is the constant temperature process.
e know that work for isothermal process
So now putting the values
W=-283.47 KJ
Negative sign indicates that work is done on the system.
So work input =283.47 KJ
Answer:
-4.5 m/s
Explanation:
Assuming steady and incompressible flow and uniform properties at each section
Here V is velocity of flow and A is area, Q is flow rate out of the leak, subscript 1-4 represent different sections
At the surface, is negative hence the equation above will be
Making the subject of the formula then
Substituting the given values then