Density problem:
The specific weight of water at ordinary pressure and temperature
is 9.81 KN/m3. The specific gravity of mercury is 13.56.
Compute the density of water and the specific weight and density of mercury.
Solution:
Viscosity problem:
In the Fig oil of
absolute viscosity
fills the small gap of thickness Y.
(a)
Neglecting fluid stress exerted on the circular underside, obtain an expression
for the torque T required to rotate the truncated cone at constant speed
.
(b) What is the rate of heat generation, in joules per second, if the oil’s
absolute viscosity is 0.20 N.s/m2,
,
, b = 60 mm, Y= 0.2 mm
and the speed of rotation is 90 rpm?
Surface Tension problem:
Water at 10°C stands in a clean glass tube of 2-mm
diameter at a height of 35 mm. What is the true static height?
Solution:
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