49. | The time interval between one vernal equinox and the next is nearest to which of the following figures? | |||||||
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50. | Which of the following is measured on the Richter scale? | |||||||
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51. | The term used to describe the combined effect of all shortwave losses in | |||||||
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52. | The time difference between each side of the International Date line is | |||||||
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53. | The soil used for cutting bricks, use in the construction of houses is | |||||||
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