Chapter 10 Homework-Google Chrome Secure https:// Chapter 10 Homework ± Using a

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Chapter 10 Homework-Google Chrome Secure https:// Chapter 10 Homework ± Using a Barometer to Measure Atmospheric Pressure 972667 14 C13 of 13 Units of pressure Air pressure is measured by a barometer. One type of barometer utilizes an evacuated, calibrated tube inverted in a pool of mercury. The pool of mercury is open to the atmosphere As air pressure increases the mercury will rise in the column until e weight of the mercury in the column equals the force exerted by the air on the surface of the pool. The difference in The column of a mercury barometer is calibrated in inear unns (such as such a barometer is reported in terms of these inear units. This measurement of pressare can be converted to other common pressure units. Some conversion factors are shown here ) and thus the air pressure observed on 11nmHg l torr atim760 mmHg 1 atm1.01325 bar 1 Pa 10 bar 1 in 1 cm 2 Figure ·54 cm 101nm · 1of1 Part A The barometer shown here (Figure 1) measures atmosphenc pressure in mimesers of mercury mimHg According to ths barometer what is the atmospherc pressure P in inches of mercury (inHg)? Express your answer in inches of mercury using five significant figures View Available Hint(s) 1 ? .vt)|AL inHg P: . 0393 2000 Type here to search

Explanation / Answer

A) 1 inche = 2.54 cm = 25.4 mm

1 cm = 10mm

Reading on scale is 753.4 mmHg = 753.4/25.4 InHg = 29.66 InHg

B) we know that, 1atm = 1.01325 bar = 1013.25 mbar

And 1atm = 760 mmHg

So, 760 mmHg = 1013.25 mbar

Then 937 mbar = 937 mbar × 760 mmHg / 1013.25 mbar = 702.81 mmHg

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