Thermometer in general contain mercury or alcohol. The way it works is based on the expansion process. If the temperature rises, the mercury expands and the surface of the mercury rises. Conversely, when the temperature drops, the surface of the mercury also fell. Celsius thermometer scale of 0 degrees C to 100 degrees C. The thermometer Fahrenheit scale 32 degrees F to 212 degrees F. The thermometer Reamur scale of 0 degrees to 80 degrees R. R so that the third thermometer was held the comparison is:
R: C: (F-32) = 4: 5: 9
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