Q)
(chatquestion)...89
Mechanical Properties of Fluids
(a) water rises upto the top of capillary tube
and stays there without overflowing
A fluid is in streamline flow across a horizont
8.
pipe of variable area of cross section. For.
which of the following statements is corr
(b) water rises upto a point a little below the
top and stays there
[NEET Ka 13]
(a) The velocity is minimum at the na west
part of the pipe and the pressure is m mum
at the widest part of the pipe
(b) The velocity is maximum at the narro
part of the pipe and pressure is maximum at
the widest part of the pipe
(c) Velocity and pressure both are maximum at
the narrowest part of the pipe
(d) Velocity and pressure both are maximum at
the widest part of the pipe
water does not rise at all.
(c)
(d) Water rises upto the tip of capillary tube
and then starts overflowing like fountain
of radius coaresce to Torm a smgio urop of
radius 'R' and volume 'V'. If T' is the surface
tension of the liquid, then :
[2014]
Te
is released
(a) energy= 4VT
Topic 3: Viscosity & Terminal Velocity
The terminal velocity v, of a small steel ball of
radius r falling under gravity through a column
of a viscous liquid of coefficient of viscosity
depends on mass of the ball m, acceleration due
to gravity g, coefficient of viscosity n and
radius r. Which of the following relations is
dimensionally correct ?-
svr()
9.
(b) energy = 3VT
is absorbed
(e) energy= 3VT
is released
(d) energy is neither released nor absorbed
The wetability of a surface by a liquid depends
primarily on
(a) surface tension
[1992]
12.
mgr
(a) v, oc
(b) v, omgnr
[2013]
(b) density
(c) angle of contact between the surface and
the liquid
(d) viscosity
The angle of contact between pure water and
mg
nmg
(d) v, oc
(c)
rn
1ension, Dunace
Capillarity
10.
Water rises to a height 'h' in a capillary tube. If
the length of capaillary tube above the surface
of water is made less than 'h' then : [2015 RSJ
pure glass, is
[1996]
(a) 0°
(b) 45°
(c) 90°
(d) 135°
ANSWER KEY
(a)
9
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