A Lower Tank Contains Water While an Upper Tank Contains

question 23

Multiple Choice

A lower tank contains water while an upper tank contains air with a negligible concentration of water vapor.A tube with a circular cross section and radius 0.050 m is inserted between the two tanks.The length of the tube is 0.25 m.The diffusion coefficient of water vapor through air is 2.4 × 10^-⁵ m²/s.The concentration of water vapor just above the surface of the water is 1.7 × 10^-² kg/m³.If the water vapor is removed from the upper tank so that the concentration there remains nearly zero,what mass of water vapor diffuses through the tube each hour?

• A)4.6 × 10^-⁵ kg
• B)2.0 × 10^-⁶ kg
• C)7.1 × 10^-⁷ kg
• D)1.3 × 10^-⁸ kg
• E)8.2 × 10^-⁸ kg

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Definitions:

Duration Of Liabilities

A measure of the sensitivity of the price (the value of principal) of a fixed-income investment to a change in interest rates, expressed in years.

Yield To Maturity

The total return expected on a bond if it is held until its maturity date.

Price Decline

Price decline refers to the decrease in the market price of a security or asset over a specific period.

Equal Magnitude

A term used to describe quantities or values that are the same in size, amount, or degree.