The angle between the plane of the ecliptic and the plane of equator is approximately:4
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Assuming mid-latitudes (40° to 50°N/S).At which time of year is the relationship between the length of day and night, as well as the rate of change of declination of the sun, changing at the greatest rate?4
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Given:value for the flattening of the Earth is 1/298.Earth's semi-major axis, as measured at the equator, equals 6378.4 km. What is the semi-minor axis (km) of the earth at the axis of the poles?4
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The diameter of the Earth is approximately:4
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If an aeroplane was to circle around the Earth following the parallel 60°N at a ground speed of 480 KT. In order to circle around the Earth along the equator in the same amount of time, it should fly at a ground speed of:4
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A nautical mile is:4
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The duration of civil twilight is the time:4
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When it is 0600 Standard Time in Queensland (Australia) the Standard Time in Hawaii (USA) is:4
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A negative (westerly) magnetic variation signifies that:4
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A flight is to be made from 'A' 49°S 180°E/W to 'B' 58°S, 180°E/W. The distance in kilometres from 'A' to 'B' is approximately:4
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