I’m guessing This Is Free points? I love That book
Answer:
157.38° CCW from +x axis
67.38° CCW from +y axis
n = (12/13)i +(5/13)j
Explanation:
The reference angle is ...
arctan(15/36) ≈ 22.62° . . . . CW from the -x axis
The signs of the component vectors indicate this is a 2nd-quadrant vector, so the angles of interest are ...
157.38° CCW from +x axis
67.38° CCW from +y axis
The unit vector will be ...
n = cos(157.38°)i +sin(157.38°)j
n = (12/13)i +(5/13)j
Answer:
The work done or the heat transfer for air and hydrogen are 91.71 kj/kg and 1317.89 kj/kg respectively.
Explanation:
Given:
Initial pressure is 7.6 bar.
Initial temperature is 77 °C.
Final pressure is 3.05 bar.
Calculation:
(a)
Take air as an ideal gas with gas constant 0.287 kj/kgK.
Step1
For isothermal process work done and heat transfer is the same because of no change in internal energy.
Work done is calculated as follows:


W = 91.71 kj/kg.
Thus, the work done or the heat transfer for isothermal process is 91.71 kj/kg.
Step2
For isothermal process work done and heat transfer is the same because of no change in internal energy. Take Hydrogen as an ideal gas with gas constant 4.1242 kj/kgK.
Work done is calculated as follows:


W = 1317.89 kj/kg.
Thus, the work done or the heat transfer for isothermal process is 1317.89 kj/kg.
Answer:
(x1,x2,x3)=(0.985507,1.463768,0.913043)
Explanation:
<em>note: </em>
<em>solution is provided in word document please find the attached document.</em>