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At room temperature (25^@C) the length o...

At room temperature (`25^@C`) the length of a steel rod is measured using a brass centimetre scale. The measured length is 20 cm. If the scale is calibrated to read accurately at temperature `0^@C`, find the actual length of steel rod at room temperature.

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To find the actual length of the steel rod at room temperature (25°C), we need to account for the thermal expansion of both the steel rod and the brass scale used for measurement. The scale is calibrated to read accurately at 0°C, and we need to find the actual length of the steel rod at 25°C based on the measurement taken. ### Step-by-Step Solution: 1. **Identify the given values:** - Measured length of the steel rod at 25°C (using brass scale), L' = 20 cm - Temperature at which the scale is calibrated, T0 = 0°C - Room temperature, T = 25°C ...
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