what are the upper and lower fixed points of thermometer?
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To define a temperature scale, we first choose two reference temperatures called the fixed points. ... The lower fixed point, or ice point, is the temperature of pure melting ice at normal atmospheric pressure. The upper fixed point, or steam point, is the temperature of pure boiling water at normal atmospheric pressure.
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To define a temperature scale in a thermometer, we need to choose two reference points, which are known as fixed points. ... The lower fixed point is determined by the temperature of pure melting ice and the upper fixed point is determined by temperature of pure boiling water.
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