What is the approximate composition of the dry air by volume in the troposphere?4
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The tropopause is a level at which4
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The height and the temperature of the tropopause are respectively in the order of4
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Considering the route indicated from Recife to Dakar the mean height of the tropopause during January is approximately4
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A layer is conditionally unstable if the air4
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Which of the following is a common cause of ground or surface temperature inversion ?4
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The environmental lapse rate in an actual atmosphere4
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In the troposphere the decrease of pressure per 100 m increase in height4
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An isohypse (contour)4
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An aircraft is flying at FL 180 in the northern hemisphere with a crosswind from the left. Which of the following is correct concerning its true altitude ?4
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