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The simple barometer in Figure P2.2.3 uses water at 30°C as the liquid indicator. The liquid column

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The simple barometer in Figure P2.2.3 uses water at 30°C as the liquid indicator. The liquid column rises to a height of 9.8 m from an original height of 8.7 min the vertical tube. Compute the new atmospheric pressure, neglecting surface tension effects. What is the percentage error if the direct reading is used and vapor pressure is ignored?
The simple barometer in Figure P2.2.3 uses water at 30°C
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8.7 Figure P2.2.3

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water at 30C 977 kNm 3 P vapor at 30C 424 kNm 2 P atm P column P v...View the full answer


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The property of the surface of a liquid that allows it to resist an external force, due to the cohesive nature of its molecules. The cohesive forces between liquid molecules are responsible for the phenomenon known as surface tension. The molecules at the surface of a glass of water do not have other water molecules on all sides of them and consequently, they cohere more strongly to those directly associated with them (in this case, next to and below them, but not above). is not really true that a \\\"skin\\\" forms on the water surface; the stronger cohesion between the water molecules as opposed to the attraction of the water molecules to the air makes it more difficult to move an object through the surface than to move it when it is completely submersed

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