1. Recalculate the case below using SI
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Hello good evening Sir,
Permission, i have a question in my homework. The following bellow is question. Please advice. Thank you
Regards,
Irfan
1. Recalculate the case below using SI
2. What if the mercury fluid is replaced with kerosene, what is the pressure?

Transcribed Image Text:Energy conservation(cont.)
If energy is added, removed or lost via pumps turbines, friction, etc.then we use
Pi
Extended Bernoulli's Equation
+z, +h4-h; -h,
2g
P2, V
+ Z2
2g
Example: Determine the efficiency of the pump if the power input of the motor
is measured to be 1.5 hp. It is known that the pump delivers 300 gal/min of water.
No turbine work and frictional losses, hence: h=h=0. Also z,=Z,
4-in dia.pipe
Given: Q=300 gal/min=0.667 ft/s=AV
V= Q/A,=3.33 ft/s V,-Q/A,=7.54 ft/s
6-in dia. pipe
1
kinetic energy head gain
+.
pump
V} – V
(7.54) – (3.33)²
= 0.71ft,
Z=15 in
2g
2*32.2
Looking at the pressure term:
P +7 „7, +Y „z = P2 +Y „Z, +Y wZ
m
Mercury (y-844.9 lb/ft*)
water (y-62.4 lb/ft3)
P2 - P = (7 m -Y „)z
1 hp=550 lb-ft/s
= (844.9 – 62.4)*1.25 = 978.13 lb/ ft?
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