EML3100 HW #13 - Fall 1998|
| Due: Thursday 10/8/98 |
|
Problems:
4.21
4.45
Answers:
4.21: Q-dot = - 20.3 kW
4.45: Q-dot = - 0.12 kW
Hints:
4.21: * Determine if the air is behaving as an ideal gas
* Remember, W-dot = w*m-dot
* Remember, V-dot = m-dot*v
4.45: Remember to find the phase at each state.
In general:
- Read EACH word.
- Draw some pictures (one for each state).
- Write your assumptions
- Write the given information under each picture.
- Write what it is you are to find.
- If necessary, find the phase at each state. (you may need this to find the "u"s, "v"s or "h"s)
- Write write the equations you are to use (or might want to use).
- Solve the problem...
- PLEASE try to be organized.