A barometer kept in an elevator accelerating upwards with acceleration $\mathrm{a}$. Find most likely pressure inside the elevator.
A barometer kept in an elevator accelerating upwards with acceleration $\mathrm{a}$. Find most likely pressure inside the elevator.
The resultant acceleration of elevator in upwards direction $=a+g$ $\therefore$ The pressure in elevator
$=h \rho(g+a)$
$=\frac{76 \times 13.6 \times(g+a)}{13.6 \times g} \mathrm{~cm} \mathrm{Hg}$
This pressure is greater than the atmospheric pressure $76 \mathrm{~cm} \mathrm{Hg}$.
Similar Questions
A manometer reads the pressure of a gas in an enclosure as shown in Figure $(a)$ When a pump removes some of the gas, the manometer reads as in Figure $(b)$ The liquid used in the manometers is mercury and the atmospheric pressure is 76 cm of mercury.
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$(b)$ How would the levels change in case $(b)$ if $13.6\; cm$ of water (immiscible with mercury) are poured into the right limb of the manometer ? (Ignore the small change in the volume of the gas).
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