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the bulb of a mercury in glass thermometer has a volume of 0.5cm³ and the...

the bulb of a mercury in glass thermometer has a volume of 0.5cm³ and the distance between progressive mark is 2mm. If the linear expansively of glass is 10^-5 /K, and the expansivity of mercury is 1.8×10^-4/K, find the cross-sectional area of the stem?

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