what is centripetal force?
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a force that acts on a body moving in a circular path and is directed towards the centre around which the body is moving.
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(i) Environmental aspects must be carefully looked into before building
huge dams.
(11) Most industries are concentrated around coal mines.
(1) Petroleum is referred to as “black gold”.
(iv) Quarrying can become a major environmental concern.
Distinguish between the followings.
(i) Conventional and non conventional sources of energy
(ii) Biogas and natural gas
(iii) Ferrous and nonferrous minerals
(iv) Metallic and nonmetallic minerals
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