Answer:
I. 3.316 kW
II. 1.218 kW
III. 2.72
Explanation:
At state 1, the enthalpy and entropy are determined using the given data from A-13.
At P1 = 200kpa and T1 = 0,
h1 = 253.07 kJ/kg
s1 = 0.9699 kJ/kgK
At state 2, the isentropic enthalpy is determined at P2 = 1400kpa and s1 = s2 by interpolation. Thus
h2(s) = 295.95 kJ/kg
The actual enthalpy is then gotten by
h2 = h1 + [h2(s) - h1]/n
h2 = 253.07 + [295.95 - 253.07]/0.88
h2 = 253.07 + 48.73
h2 = 301.8 kJ/kg
h3 = h4 = 120.43 kJ/kg
Heating load is determined from energy balance, thus,
Q'l = m'(h1 - h4)
Q'l = 0.025(253.07 - 120.43)
Q'l = 0.025 * 132.64
Q'l = 3.316 kW
Power is determined by using
W' = m'(h2 - h1)
W'= 0.025(301.8 - 253.07)
W'= 0.025 * 48.73
W'= 1.218 kW
The Coefficient Of Performance is Q'l / W'
COP = 3.316/1.218
COP = 2.72
Answer:
being prepared and having sufficient military resources available can be great IF there is an attack although it can be viewed as intimidating and scare off allies. also, it can cause other resources too thin.
Explanation:
it is great to have a sense of national pride and togetherness although if it gets out of hand it can be almost brainwashing and used to control citizens.
Answer:
What subject is this in?? That would help a lot knowing
Explanation:
Answer:
(a) 2.5 ksi
(b) 0.1075 in
Explanation:
(a)
Making 
the subject then
where is the stress and 
is the strain
Since strain is given as 0.025% of the length then strain is 
Now substituting E for 
then
(b)
Stress, 
making A the subject then
where d is the diameter and subscripts o and i denote outer and inner respectively.
We know that 
where t is thickness
Now substituting
But the outer diameter is given as 2 in hence
As already mentioned, 
