Fox And Mcdonald's Introduction To Fluid Mechanics
9th Edition
ISBN: 9781118921876
Author: Pritchard, Philip J.; Leylegian, John C.; Bhaskaran, Rajesh
Publisher: WILEY
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Textbook Question
Chapter 10, Problem 65P
Francis turbine Units 19, 20, and 21, installed at the Grand Coulee Dam on the Columbia River, are very large [55]. Each runner is 32.6 ft in diameter and contains 550 tons of cast steel. At rated conditions, each turbine develops 820,000 hp at 72 rpm under 285 ft of head. Efficiency is nearly 95 percent at rated conditions. The turbines operate at heads from 220 to 355 ft. Calculate the specific speed at rated operating conditions. Estimate the maximum water flow rate through each turbine.
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A sign ABCD is constructed from 5 mm thick plate steel
(density p=8000 kg/m³) with the geometry shown in the
figure. The sign is connected to the wall by a pin at A and
also supported by member BE. Support member BE is also
constructed from 5 mm thick plate steel and is connected by
pins at B and E respectively. Determine the reaction forces
at A and E. Enter your answers in Cartesian components.
The weights of both the sign ABCD and member BE
should be accounted for in the calculation. Assume the pins
cm away from the ends at each
are located a distance
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connection.
W
E
CC +
BY NC SA
2016 Eric Davishahl
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2
B
C
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Values for dimensions on the figure are given in the following
table. Note the figure may not be to scale.
Variable Value
a
2.4 m
b
2.88 m
с
1.2 m
h
1.152 m
ω
7 cm
The reaction at A is A
-1265
The reaction at E is E
3291
0
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× ĴN.
=
0
* i+
× ĴN.
Answers in box are incorrect so need help, please show all work, steps, units and round to 3 significant figures. Thank you!
Compute the coordinates of the centroid (x, y) of the area
shown.
y
y = a√√√bx
X
BY NC SA
2016 Eric Davishahl
Values for dimensions on the figure are given in the following
table. Note the figure may not be to scale.
Variable Value
α
4.5 in
b
1.6 in 1 (Note the -1 exponent only applies to
the unit, not the number.)
с
6 in
The coordinate of the centroid is =
4
☑ in.
The y coordinate of the centroid is y =
11.4
☑ in.
Chapter 10 Solutions
Fox And Mcdonald's Introduction To Fluid Mechanics
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