- Section 1
51. |
Supersonic plane fly with the speed |
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52. |
Stars which appear single to the naked eye but are double when seen through a telescope are |
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53. |
ML2T-2 is the dimensional formula for |
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54. |
On a stationary sail boat, air is blown from a fan attached to the boat. The boat |
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55. |
Rainbow is due to |
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