Energy Fundamentals
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Questions and Answers

What is energy a measurement of?

  • The ability of something to stop working
  • The ability of something to change
  • The ability of something to be measured
  • The ability of something to do work (correct)
  • What can happen to energy?

  • It can be created or destroyed
  • It can only be stored or transferred
  • It can only be measured or observed
  • It can only be transferred or transformed (correct)
  • What is a characteristic of energy?

  • It can be observed, stored, and measured (correct)
  • It can only be created, not destroyed
  • It can only be observed, not measured
  • It can only be transferred, not transformed
  • What is NOT a property of energy?

    <p>It can be lost</p> Signup and view all the answers

    What is a fundamental principle of energy?

    <p>Energy can neither be created nor destroyed, only transferred or transformed</p> Signup and view all the answers

    What is the primary function of energy?

    <p>To enable work to be done</p> Signup and view all the answers

    What happens to energy during most energy conversions?

    <p>Some energy is wasted as heat</p> Signup and view all the answers

    What is energy efficiency a measure of?

    <p>How much input energy is converted to useful output energy</p> Signup and view all the answers

    What is the formula to calculate energy efficiency?

    <p>Useful energy divided by input energy times 100</p> Signup and view all the answers

    What is wasted energy an example of?

    <p>Output energy that is not wanted or desired</p> Signup and view all the answers

    Study Notes

    What is Energy?

    • Energy is the ability of something to do work.
    • It is a measurement of the capacity to cause a change or to perform a task.

    Characteristics of Energy

    • Energy can be observed, making it a tangible phenomenon.
    • Energy can be stored, allowing it to be utilized at a later time.
    • Energy can take many forms, making it a versatile and dynamic concept.

    Energy Conservation

    • Energy cannot be created or destroyed, a fundamental principle in physics.
    • Energy can only be transferred or transformed from one form to another.
    • Energy cannot be lost, it is always conserved in a closed system.

    Energy Basics

    • Energy is a measurement of the ability of something to do work.
    • Energy can be observed, stored, and measured in many forms.

    Energy Conservation

    • Energy cannot be created or destroyed, only transferred or transformed.
    • Energy cannot be lost, it can only be transferred or transformed from one form to another.

    Energy Efficiency

    • Energy efficiency is a measure of how much input energy is converted into useful output energy.
    • Input energy is the energy you start with, while useful energy is the output energy that's desired in the end.
    • Energy efficiency formula: (Useful Energy ÷ Input Energy) × 100, with the answer in a percentage.

    Energy Waste

    • Wasted energy is the output energy that is not wanted or desired.
    • Most energy conversions waste some energy, usually in the form of heat (thermal energy).

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    Description

    This quiz covers the basics of energy, including its definition, forms, measurement, and principles of conservation and transfer.

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