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Heat and Energy

  • The measure of degree of hotness of a substance is called its temperature.
  • The device that is used to measure the temperature of a substance is called thermometer. 
  • Thermometers are of two types - clinical (used for measuring temperature of human body) and laboratory (used for measuring temperature of common objects). 
  • The temperature range of clinical thermometer is 37- 42 °C and that of laboratory thermometer is -10 oC to  +110 oC. The unit for temperature is °C. 
  • The normal temperature of human body is 37 °C or 98.6 °F.
  • There are three commonly scales used in temperature
  • Celsius scale of temperature
  • Fahrenheit scale of temperature 
  • Kelvin scale of temperature
  • Kelvin is the SI unit of temperature.         
  • The SI unit of heat is joule (J)
  • Other common …

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