Work and Energy Quiz
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Questions and Answers

Which of the following is a necessary condition for work to be performed?

  • A change in velocity
  • A change in energy
  • An object at rest
  • An applied force (correct)

    • What is the unit of energy?

  • Newton
  • Joule (correct)
  • Watt
  • Pascal

    • Which of the following equations represents the work done by a constant force?

  • $W = F \times d$
  • $W = F \times d \times \cos(\theta)$ (correct)
  • $W = F \times \cos(\theta)$
  • $W = F + d + \cos(\theta)$

    • Which of the following is a form of potential energy?

    <p>Gravitational potential energy</p> Signup and view all the answers

    According to the law of conservation of energy, energy cannot be

    <p>Created or destroyed</p> Signup and view all the answers

    Which separation technique would be most effective for separating mercury and water?

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

    What is the separation technique used to separate potassium chloride and ammonium chloride?

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

    Which combination of separation techniques would be most effective for separating common salt, water, and sand?

    <p>Filtration and evaporation</p> Signup and view all the answers

    Which combination of separation techniques would be most effective for separating kerosene oil, water, and salt?

    <p>Decantation and evaporation</p> Signup and view all the answers

    Which tube in Fig. 2.1 (a) and (b) would be more effective as a condenser in the distillation apparatus?

    <p>Tube (a)</p> Signup and view all the answers

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