• Entry
  • Reader's guide
  • Entries A-Z
  • Subject index

All the quantities physicists call “observables” are operationally defined; that is, they are specified in terms of measurements performed by well-prescribed measuring procedures. Temperature is what we measure with a thermometer. Voltage ...

Loading
  • Loading...
locked icon

Sign in to access this content

Get a 30 day FREE TRIAL

  • Watch videos from a variety of sources bringing classroom topics to life
  • Read modern, diverse business cases
  • Explore hundreds of books and reference titles