Cold light produced no heat because of
the absence of
(A) UV Rays
(B) Infrared rays
(C) X-Ray
(D) Visible rays
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7
Answer:
infrared rays is your answer mate
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3
Answer:
(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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