why should the bulb be immersed in the liquid for which temperature is to be measured
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Thermometer is a device which is used to measure temperature. Thermometer is made of a long narrow glass tube; with a bulb at one end. ... Mercury is a metal which is in liquid state at room temperature and it readily expands or contracts at the slightest change in temperature. Hence, mercury is used in thermometer.
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The bulb of laboratory thermometer be immersed in water will measuring temperature because it does not have kink so mercury will get contract.
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