1. Calculate the resistance between points A and B (RAB) for the following resistor networks:
Figure 1
All resistors 5000
Figure 2
All resistors 1 k2
Figure 3
A
2k03 352
B В
4700
1000 $
B
A
ww
Figure 6
Figure 4
250 Ω
Figure 5
All resistors 2.2 k12
.B
23003
4700
31000
47002
33003
AW
94002
B

Air enters a horizontal, constant-diameter heating duct operating at steady state at 290 k, 1 bar, with a volumetric flow rate of 0.25 m°/s, and exits at 325 k, 0.95 bar. the flow area is 0.04 m2. assuming the ideal gas model with k = 1.4 for the air, determine (a) the velocity at the inlet and exit, each in m/s, and (c) the rate of heat transfer, in kw flow rate, in kg/s, (b) the mass kg 0.3