The Concept of Time Measurement
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Questions and Answers

According to the Second Law of Thermodynamics, how do systems in our universe behave over time?

  • They maintain a constant level of order
  • They remain completely chaotic
  • They move from order to disorder (correct)
  • They move from disorder to order
  • What does the Wheeler-DeWitt equation, a contender for a 'theory of everything', notably exclude?

  • Entropy and disorder
  • Matter and energy
  • Gravity and electromagnetic force
  • Space and time (correct)
  • How are emergent properties defined in the text?

  • Properties that exist independently of the system
  • Properties that exist for the system as a whole but not in individual pieces (correct)
  • Properties that exist in individual pieces but not for the system as a whole
  • Properties that are imaginary and not based on any physical reality
  • In the analogy of a movie creating change through time, what does each individual frame of the movie lack?

    <p>The passage of time</p> Signup and view all the answers

    What is one of the biggest goals in theoretical physics mentioned in the text?

    <p>Reconciling general relativity and quantum physics into a fundamental 'theory of everything'</p> Signup and view all the answers

    What does Einstein’s theory of relativity tell us about time?

    <p>Time passes at different rates for people in different situations, like those travelling close to the speed of light or orbiting a supermassive black hole</p> Signup and view all the answers

    What did Einstein combine with time to define space-time?

    <p>Space</p> Signup and view all the answers

    Why is it we can move through space in any direction, but through time in only one?

    <p>Because the past is always, stubbornly, behind us</p> Signup and view all the answers

    What was one of the earliest time measurements mentioned in the text?

    <p>Observations of cycles of the natural world</p> Signup and view all the answers

    What did Einstein's theory of relativity confirm about time?

    <p>Time is woven into the very fabric of the universe</p> Signup and view all the answers

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