. A barometer made of a very narrow tube (see fig) is placed at normal temperature and pressure


A barometer made of a very narrow tube (see fig) is placed at normal temperature and pressure. The coefficient of volume expansion of mercury is 0.000 18/°C and that of the tube is negligible. The temperature of mercury in the barometer is now raised by 1 °C but the temperature of the atmosphere does not change. Then, the mercury height in the tube remains unchanged

temperature

Best Answer

On increasing the temperature of mercury its density will decrease. Hence, level of mercury in barometer tube will increase

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