What is thermommeter? What is mercury thermometer?

What is weight thermometer?

What is used inside thermometer?

What is the melting point of mercury?

A centimetre scale is attached with a thermometer of uniform bore. The thermometer reads 7.3 cm in melting ice, 23.8 cm in boiling water and 3.5 cm in a freezing mixture. What is the temperature of this freezing mixture in ""^(@)C ?

The planet Mercury revolves around the sun once in 88 days. If the mean distance between the earth and the sun is 1.5 xx10^8 km , what is the mean distance of Mercury from the sun ?

A gas has volume 3 litre when the thermometer reads 300 K. If the thermometer stands at 400 K, the volume of the gas will be close to