A barometer tube containing mercury is lowered in a vessel containing mercury until only 50 cm of the tube
Answers
A barometer tube, containing mercury, is lowered in a vessel containing mercury until only 50 cm of the tube is above the level of mercury in the vessel. If the atmospheric pressure is 75 cm of mercury, then the pressure at the top of the tube is 33.33 K Pa.
Explanation:
=> Here, the mercury rises only 50 cm of the tube. and rest of the excess atmospheric pressure is being countered by the pressure at the top of the tube.
=> Atmospheric pressure of mercury = 75 cm
∴ Pressure(at top) + Pressure (due to 50cmHG) = atmospheric Pressure
Pressure(at top) = atmospheric Pressure - Pressure (due to 50cmHG)
= 75 - 50 cm of HG
= 25 cm of HG
= 25/75 * 10⁵ Pa
= 0.3333 * 10⁵ Pa
= 33.33 * 10³ Pa
= 33.33 K Pa
Thus, The pressure at the top of the tube is 33.33 K Pa.
Learn more:
Q:1 What is atmospheric pressure? what is it caused by?
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Q:2 Find the force applied by atmospheric pressure on area 15cm x 15cm.
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Explanation:
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