GK
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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It indicates how cold the water is.
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It indicates how cold the thermometer is.
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It indicates how cold the system is.
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All of these are true.
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Detailed explanation-1: -Laboratory thermometer cannot be used for measuring body temperature.
Detailed explanation-2: -The temperature of boiling water cannot be measured by a thermometer.
Detailed explanation-3: -Water cannot be used in thermometer because of its higher freezing point and lower boiling point than other liquids . If water is used in a thermometer, it will start phase change at 0oC and 100oC and will not measure temperature, out of this range .
Detailed explanation-4: -Water is not helpful to measure below 0oC and above 100oC. The most metals are solids at room temperature but the mercury is liquid form because it has high coefficient of expansion. The mercury does not stick to capillary wall of thermometer and which can easily measure temperature accurately.