Question

why the mercury is used in barometer

Answer 1

the mercury is used in barometer

due to its high density .

Mercury has a very low vapor pressure when compared to that of water.

Mercury's freezing point is much lower than that of water's so it can record the atmospheric pressure at temperatures below that of 0 degrees centigrade.

Mercury does not evaporate easily


Mercury being a metal shines brightly and so can be used to read the markings on the tube easily.

Answer 2

Answer:

Mercury is commonly used in barometers because its high density means the height of the column can be a reasonable size to measure atmospheric pressure.......