Physics Chapter on Energy and Work
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Questions and Answers

What is the formula for calculating work done on an object?

  • W = F × d (correct)
  • W = F + d
  • W = F / d
  • W = F - d

    • How is kinetic energy calculated?

  • K = mv
  • K = ½mv² (correct)
  • K = mgh
  • K = mv²

    • What represents the concept of energy conservation?

  • Energy is only conserved in isolated systems.
  • Energy is created during nuclear fission.
  • Energy can transform from one form to another, but cannot be created or destroyed. (correct)
  • Energy can be created or destroyed.

    • What happens to molecular motion at absolute zero?

    <p>Molecular motion ceases completely.</p> Signup and view all the answers

    What is the unit of energy equivalent to one Joule?

    <p>1 Newton-meter (N-m)</p> Signup and view all the answers

    Which reaction is an example of nuclear fusion?

    <p>Combining hydrogen to form helium</p> Signup and view all the answers

    Which type of radiation requires different shielding materials for effective blockage?

    <p>Alpha, beta, gamma, and neutron radiation</p> Signup and view all the answers

    What does the unit mSv measure?

    <p>Radiation exposure</p> Signup and view all the answers

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