1.The lengths of the mercury columns of two mercury-in-glass thermometers are the same at 0 degree. However, when they are placed in the same beaker of warm water, the lengths of the mercury coloums are different. Suggest two possible answers.
點解係0 度一樣, 但其他唔一樣既?
2We should not use boiling water to sterilise a liquid-in-glass clinical thermometer.Why?