Hydraulics & Fluid Mechanics
Mercury is often used in barometer because

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

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Hydraulics & Fluid Mechanics
Select the correct statement

Local atmospheric pressure is always below standard atmospheric pressure
A barometer reads the difference be-tween local and standard atmospheric pressure
Standard atmospheric pressure is the mean local atmospheric pressure a* sea level
Local atmospheric pressure depends upon elevation of locality only

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