What are the characteristics of a good source of energy?
Characteristics of a good sources of energy are:
(i) it should give an adequate amount of net energy or work per unit volume or mass,
(ii) it must be convenient to use so as to give energy at a steady rate,
(iii) it must be easy to store and transport,
(iv) it must be economical, and
v) it must be easily accessible.
List any four sources of energy which are selected for use for a given activity.
1. Energy to run a cycle
2. Energy to run a car
3. Energy to cook food
4. Energy to work on
Name the source of energy in sun and stars.
