A jet of water injected into stationary water: Upon emerging from the slit at the left, the jet of fluid loses some of its momentum to the surrounding fluid. This causes the jet to slow down and its width to increase (air bubbles in water). (Photograph co
THE UNTVERSITYOF HONG KONG
Facultyof Engireerirg
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Foundations f engineering echanics ENGGI 010)
Tutorial 4: Torsion
1. The solid cylindricalshaftof variablesize,as shownin mm in Figure f is actedupon
t
by the torquesindicated.What is the maximum orsi
An image of hurricane Allen viewed via satellite: Although there is considerable motion and structure to a hurricane, the pressure variation in the vertical direction is approximated by the pressure-depth relationship for a static fluid. 1Visible and infr
Fluid Mechanics Problem 6
The diameter of a pipe bend is 300 mm at inlet and 150 mm at outlet and the flow is turned
through 60o in a vertical plane. The axis at inlet is horizontal and the centre of the outlet
section is 1.5 m above the centre of the inl
Fluid Mechanics Problems 5
Find the horizontal component of the force exerted by the flowing water on 1 m width of the
(shaded) outflow structure, which discharges via a 0.2 m diameter circular duct to the
atmosphere. Hint: consider the control volume as
Fluid Mechanics Problems 4
Oil ( = 800 kg/m3) flows through a pipe line (see figure below), which contracts from 450
mm diameter at A to 300 mm diameter at B and then forks, one branch being 150 mm
diameter discharging at C and the other branch 225 mm dia
Fluid Mechanics Problems 3
1.
For the tank shown below, find the pressure gauge reading if the mercury manometer
reading H = 0.2 m. Relative density of mercury = 13.6.
Pressure
gauge
Hg
2.
For an L-shaped gate shown below, determine the height H (of the w
Fluid Mechanics Problems 2
Consider a gate CD, which is shown below and can be (a) rectangular, (b) circular, and (c) triangular
in shape. The gate is only hinged at the top, and has no support elsewhere. Find the moment to be
applied at the hinge in each
Fluid Mechanics Problems 1
1.
Some people say that the seawater level will rise as a result of the melting of an
iceberg. How true is this statement?
2.
As is schematically shown below, a boat carrying a rock floats on water in a lake.
What happens to the
Time table for ENGG 1010: Foundations of Engineering Mechanics, Semester 1, 2011-12
Lecturers:
C. O. Ng for fluid mechanics (cong@hku.hk, 2859 2622, office HW701)
A. K. Soh for statics and mechanics of materials (aksoh@hku.hk, 2859 8061, office HW720)
Uni
What
What is an Engineer?
Engineering is the profession in which knowledge
of the mathematical and natural sciences gained
by study, experience, and practice is applied with
judgement to develop ways to utilize,
economically, the materials and forces of n