Problem 2-53 A differential manometer shown is measuring the difference in pressure two water pipes. The indicating liquid is mercury (specific gravity = 13.6), h is 675 mm, It is 225 mm, and h2 is 300 mm. What is the pressure differential between the two pipes. Ans: 89.32 kPa hml hi hm2
Problem 2-53 A differential manometer shown is measuring the difference in pressure two water pipes. The indicating liquid is mercury (specific gravity = 13.6), h is 675 mm, It is 225 mm, and h2 is 300 mm. What is the pressure differential between the two pipes. Ans: 89.32 kPa hml hi hm2
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Answer plss plss question 53 54 and 55
Transcribed Image Text:CHAPTER Two
Principles of Hydrostatics
FLUID MECHANICS
& HYDRAULICS
72
Problem 2 - 54
A force of 460 N is exerted on lever AB as shown. The end B is connected to
piston which fits into a cylinder having a diameter of 60 mm. What force
acts on the larger piston, if the volume between C and D is filled with water?
Ans: 15.83 kN
460 N
Water
220 mm
Fo
TO
120 mm
ur
B
c 160 mm e
Problem 2 - 55
wh
An open tube open tube is attached to a tank as shown. If water rises to a
height of 800 mm in the tube, what are the pressures pA and på of the air above
water? Neglect capillary effects in the tube.
in
pre
Ans: PA = 3.92 kPa; på = 4.90 kPa
PA
PB
B
100 mm
Water
300 mm
Water
Flo
74
CHAPTER THREE
Total Hydrostatic Force on Surfaces
FLUID MECHANICS
& HYDRAULICS
Consider the plane surface shown inclined at an angle e with the horizontal
To get the total force F, consider a differential element of area dA. Since this
element is horizontal the pressure is uniform over this area, then;
in
ww 008
Transcribed Image Text:Kerosene
What is
00.15 kPaa
O Pa
Pc
Mercury
(s.g. = 13.6)
s: glycerin
Problem 2 - 53
A differential manometer shown is measuring the difference in pressure two
water pipes. The indicating liquid is mercury (specific gravity = 13.6), hị is 675
mm, Itt is 225 mm, and hu2 is 300 mm.
between the two pipes.
What is the pressure differential
Ans: 89.32 kPa
hml
hm2
ECHANICS
DRAULICS
CHAPTER THREE
FLUID MECHANICS
AHVDRAULICS
73
Total Hydrostatic Force on Surfaces
nected to
at force F
h water?
s: 15.83 kN
Chapter 3
Total Hydrostatic Force
on Surfaces
TOTAL HYDROSTATIC FORCE ON PLANE SURFACES
If the pressure over a plane area is uniform, as in the case of a horizontal
urface submerged in a liquid or a plane surface inside a gas chamber, the
btal hydrostatic force (or total pressure) is given by:
F=pA
Eq. 3 - 1
where p is the uniform pressure and A is the area.
rises to a
In the case of an inclined or vertical plane submerged in a liquid, the total
pressure can be found by the following formula:
e air above
= 4.90 kPa
Liquid surface
h
A
dP
Ye
da
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