A Glass Tube Has One End in a Dish of Mercury

question 105

Multiple Choice

A glass tube has one end in a dish of mercury and the other end closed by a stopcock.The distance from the surface of the mercury to the bottom of the stopcock is 800 mm,as indicated by the meter stick shown in the drawing below.The apparatus is at 20°C,and the mercury level in the tube is the same as that in the dish.
-Which drawing best shows the approximate level of the mercury in the tube when the temperature of the entire apparatus is lowered from +20°C to -20°C?

• A)drawing (1)
• B)drawing (2)
• C)drawing (3)
• D)drawing (4)

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Definitions:

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The plan and implementation of communication from a company to its audience, aiming to increase awareness, sales, or engagement with a product or service.

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The practice of dividing a broad target market into subsets of consumers who have common needs, interests, and priorities, and then designing and implementing strategies to target them.

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The practice of treating an entire market as a single entity by offering a single product or service to all customers, ignoring segmentation.