| 51. |
The rate at change of temperature is called |
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| 52. |
The process where the particle moves from the surface to the medium in quick, continuous, repeated cycles is called |
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| 53. |
The obscuring of one celestial body by another, particularly that of the sun or a planetary satellite |
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| 54. |
The river Sutlej, on which the Bhakra Dam has been built, originates from |
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| 55. |
The process of destruction or dying of fronts is called |
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