Compare the energy produced during the fission of a uranium atom with the energy produced due to the combustion of a carbon atom from coal.

Amount of charcoal produced on the destructive distillation of $1 \, kg$ of wood is about: (in $, kg$)

In a box-type solar cooker,what is the range of temperature that can be achieved in two or three hours?

Draw a labelled diagram of a floating gas holder type biogas plant and describe its working. Mention any two advantages of using animal dung for making biogas over using it as a fuel in the form of dried dung cakes.

Mention any two ways by which water can be used to produce hydroelectricity.

What type of energy is utilized by a sailing boat?