Question

why can we use mercury but not water as a liguid in a thermometer?​

Answer 1

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We use mercury in thermometers because most metals are good conductor of heat and mercury is the only metal in liquid state. ...

No,we cannot use water instead of mercury because water do not expand as per temperature given to it and can give us wrong reading.

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Answer 2

ᗯᗴ ᑌՏᗴ ᗰᗴᖇᑕᑌᖇY Iᑎ TᕼᗴᖇᗰOᗰᗴTᗴᖇՏ ᗷᗴᑕᗩᑌՏᗴ ᗰOՏT ᗰᗴTᗩᒪՏ ᗩᖇᗴ ᘜOOᗪ ᑕOᑎᗪᑌᑕTOᖇ Oᖴ ᕼᗴᗩT ᗩᑎᗪ ᗰᗴᖇᑕᑌᖇY IՏ Tᕼᗴ OᑎᒪY ᗰᗴTᗩᒪ Iᑎ ᒪIᑫᑌIᗪ ՏTᗩTᗴ.

ᑎO, ᗯᗴ ᑕᗩᑎᑎOT ᑌՏᗴ ᗯᗩTᗴᖇ IᑎՏTᗴᗩᗪ Oᖴ ᗰᗴᖇᑕᑌᖇY ᗷᗴᑕᗩᑌՏᗴ ᗯᗩTᗴᖇ ᗪOᗴՏ ᑎOT ᗴ᙭ᑭᗩᑎᗪ ᗩՏ ᑭᗴᖇ Tᕼᗴ TᗴᗰᑭᗴᖇᗩTᑌᖇᗴ ᘜIᐯᗴᑎ TO IT ᗩᑎᗪ ᑕᗩᑎ ᘜIᐯᗴ ᑌՏ ᗯᖇOᑎᘜ ᖇᗴᗩᗪIᑎᘜ.