why does clinical thermometer does not start at 0 degree celsius?

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Solution

The thermometer which is used in our homes or by a doctor for measuring body temperature is called a clinical thermometer.
Such a thermometer is a mercury thermometer. It does not measure the temperature of ice or boiling water. It can measure only a short range of temperatures from about 35 degree Celsius to 42 degree Celsius. Its range is short because the temperature of human body lies between these two temperatures.

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