Mercury is often used in barometers as depicted in Figure P2.2.3. This is because the vapor pressure of mercury is low enough to be ignored, and because it is so dense (sp. gr. = 13. 6) the tube can be shortened considerably. With the atmospheric pressure found in Problem 2.2.3 (99.9 kˆ™N/m2 at 30°C), determine the column height in meters (and feet) if mercury is used.

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8.7 m Figure P2.2.3