Educator

Temperature

• On the Celsius scale, water freezes at 0°C and boils at 100°C. On the Fahrenheit scale, water freezes at 32 F and boils at 212 F.
• To obtain the temperature in K (Kelvin), add 273.15 to its value in Celsius. The lowest temperature possible is 0 K; this is the absolute zero.
• A thermometer has a thermometric property, a property that changes with temperature and which may, therefore, be used to measure the temperature.
• An object of length L usually expands if its temperature is increased:

  Change in L = (Coefficient of linear expansion)(original L)(Change in T).

  A similar relation holds for the change in volume upon changing T.

• If an object with a hole is heated, the hole expands.
• Water has its maximum density of 999.973 kg per cubic meter at 4°C.