MECHANICAL PROPERTIES OF FLUIDS

A manometer reads the pressure of a gas in an enclosure as shown in Fig. 10.25 (a)When a pump removes some of the gas, the manometer reads as in Fig. 10.25 (b)The liquid used in the manometers is mercury and the atmospheric pressure is 76cm of mercury.

(a) Give the absolute and gauge pressure of the gas in the enclosure for cases (a)

and (b), in units of cm of mercury.

(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).