Fox and McDonald's Introduction to Fluid Mechanics
9th Edition
ISBN: 9781118912652
Author: Philip J. Pritchard, John W. Mitchell
Publisher: WILEY
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Chapter 3, Problem 31P
A barometer accidentally contains 6.5 inches of water on top of the mercury column (so there is also water vapor instead of a vacuum at the top of the barometer). On a day when the temperature is 70°F, the mercury column height is 28.35 inches (corrected for thermal expansion). Determine the barometric pressure in psia. If the ambient temperature increased to 85°F and the barometric pressure did not change, would the mercury column be longer, be shorter, or remain the same length? Justify your answer.
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CHAPTER I
1-72 A mercury manometer (p = 13,600 kg/m) is con-
nected to an air duct to measure the pressure inside. The differ-
ence in the manometer levels is 15 mm, and the atrmospheric
pressure is 100 kPa. (a) Judging from Fig. P1-72, determine if
the pressure in the duct is above or below the atmospheric
pressure. (b) Determine the absolute pressure in the duct.
Air
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a. Mercury (S.G. = 13.6)
b. Sea water (S.G. = 1.06
Chapter 3 Solutions
Fox and McDonald's Introduction to Fluid Mechanics
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