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A barometer reads 75.0 cm on a steel scale. The room temperature is 30∘C. The scale is correctly graduated for 0∘C. The coefficient of linear expansion of steel is α = 1.2 × 10−5/∘C and the coefficient of volume expansion of mercury is γ = 1.8 × 10−4/∘C. Find the correct atmospheric pressure. |
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Answer» A barometer reads 75.0 cm on a steel scale. The room temperature is 30∘C. The scale is correctly graduated for 0∘C. The coefficient of linear expansion of steel is α = 1.2 × 10−5/∘C and the coefficient of volume expansion of mercury is γ = 1.8 × 10−4/∘C. Find the correct atmospheric pressure. |
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