What is a good fuel?

  • A
    $A$ fuel that burns slowly and produces little heat.
  • B
    $A$ fuel that produces a large amount of heat,minimal smoke,and is easily available.
  • C
    $A$ fuel that is very expensive and difficult to transport.
  • D
    $A$ fuel that produces toxic gases and leaves behind a lot of ash.

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$(a)$ renewable and non-renewable?
$(b)$ exhaustible and inexhaustible?
Are the options given in $(a)$ and $(b)$ the same?

Name two energy sources that you would consider to be renewable. Give reasons for your choices.

What are the advantages of nuclear energy?

What kind of mirror - concave,convex,or plain - would be best suited for use in a solar cooker? Why?

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