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Answer 1

Answer:

i)ans=energy is a quantitative property that must be transferred to an object to perform work on or to heat ,the object

ii)ans= sources of energy means

wind, water,Sun,biomass etc

iii)ans= a) It should produce a large amount of energy per unit

b) It must be economical and pollution free

c) It must be easy to handle or carry and store

iv)ans= Water, sunlight,biomass etc

vansto

Answer 2

Answer:

1. Energy is the ability to do work. Energy is a conserved quantity and the law of conservation of energy states that energy can neither be created nor destroyed but can only be converted from one form to another. The SI unit of energy is Joule.
2. Sources of energy are basically of two types- Conventional sources -sources of energy which have been in use for a long time. For e.g., coal, petroleum, natural gas etc. Non-conventional sources – sources of energy which are yet in the process of development. They are renewable and ecologically safe.
3. •It should produce a large amount of energy per unit.

• It must be economical and pollution-free.