EBK FLUID MECHANICS: FUNDAMENTALS AND A
4th Edition
ISBN: 8220103676205
Author: CENGEL
Publisher: YUZU
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Chapter 7, Problem 130P
A one-third scale model of a car is to be tested in a wind tunnel, The conditions of the actual car ate V = 75 km h and T =0°C’ and the air temperature in the wind tunnel is 20°C.
The properties of air at 1 atm and
The properties of au at 1 atm and
In order to achieve similarity between the model and the prototype, the wmd tunnel velocity should be
(a) 255 km/h
(b) 225 km/ h
(c) 147 km/h
(d) 75 km/h
(e) 25 km/h
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The force on a component of a model in scale is 1:10 of a great bomb is measured as 45 N. Which force is expected at the prototypes component if its is used water for a model and the prototype:
a) With water at the same temperature?
b) With prototype's water at 10°C and a water from the model at 20°C?
Rem = Rep; Fm = Fp where F = p.V^2.L^2
A thermometer having a time constant of 0.2 min is placed in a temperature bath, and after the thermometer comes to equilibrium with the bath, the temperature of the bath is increased linearly with time at a rate of l0 C/min. What is the difference between the indicated temperature and the bath temperature (a) 0.1 min, (b) 1.0 min after the change in temperature begins?
A:YV
36 ll 46.ll
Test 3.pdf
F1
F2
a
F3
A
d.
C
a
F4
E
Consider the following values: -
F5
a = 12 m; b = 10 m; c = 10 m; d = 8 m;
F1 = 6 kN; F2 = 7 kN; F3 = 8 kN; F4 = 9 kN; F5 = 10 kN;
a = 30°
0 = 45°
B = 60°
1] What is the resultant moment of the five forces acting on the rod about point A?
a) - 111.6 kN.m
b) 112.6 kN.m
c) - 184.6 kN.m
d) - 109.6 kN.m
e) - 104.1 kN.m
f) None of them
2] What is the resultant moment of the five forces acting on the rod about point B?
a) -95.8 kN.m
b) 42.7 kN.m
c) 80.9 kN.m
d) 10.9 kN.m
e) 51.8 kN.m
f) None of them
3] What is the resultant moment of the five forces acting on the rod about point C?
a) 32.6 kN.m
b) - 21.1 kN.m
c) 17.4 kN.m
d) - 16.5 kN.m
e) 15.6 kN.m
f) None of them
4] What is the resultant moment of the five forces acting on the rod about point D?
a) 37.6 kN.m
b) 73.8 kN.m
c) 71.6 kN.m
d) 52.1 kN.m
e) 21.1 kN.m
f) None of them
5] What is the moment of the force F2 about point E?
a) 90.7 kN.m
b) - 88.1 kN.m
c) 54.6 kN.m
d) 103.1 kN.m
e)…
Chapter 7 Solutions
EBK FLUID MECHANICS: FUNDAMENTALS AND A
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