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Hydraulics & Fluid Mechanics

Hydraulics & Fluid Mechanics
The difference of pressure between the inside and outside of a liquid drop is

p = T/2r
(b)p = T/r
(a)p = Txr
(d)p = 2T/r

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Hydraulics & Fluid Mechanics
A bucket of water is hanging from a spring balance. An iron piece is suspended into water without touching sides of bucket from another support. The spring balance reading will

remain same
increase
decrease
increase/decrease depending on depth of immersion

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Hydraulics & Fluid Mechanics
The density of water is 1000 kg/m3 at

0°C
4°C
0°K
20°C

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Hydraulics & Fluid Mechanics
The surface tension of mercury at normal temperature compared to that of water is

more or less depending on size of glass tube
less
same
more

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Hydraulics & Fluid Mechanics
SURFACE TENSION HAS THE UNITS OF

NETON/M
NEW TONS/M
NEWTONS/M
NEWTONS

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Hydraulics & Fluid Mechanics
Mercury is often used in barometer because

it is the best liquid
the height of barometer will be less
its vapour pressure is so low that it may be neglected
both (B) and (C)

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