A scientist needs to know the temperature of a mixture to the nearest 0.05°C. Which thermometer would be most useful for the scientist?

To measure temperature to the nearest 0.05°C, the thermometer needs markings fine enough to estimate between them at that precision. With markings every 0.1°C, the scientist can estimate halfway between adjacent markings, giving increments of 0.05°C. Markings every 1°C or 5°C are too widely spaced.

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