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On an upper-level chart, the wind tends to blow: A. At right angles to the isobars or contour lines. B. Parallel to the isobars or contours. C. At an angle between 10 and 30 to the contours and towards lower pressure. D. At constant speed.
On an upper-level chart, the wind tends to blow: A. At right angles to the isobars or contour lines. B. Parallel to the isobars or contours. C. At an angle between 10 and 30 to the contours and towards lower pressure. D. At constant speed.
Final answer:Wind on an upper-level chart tends to blow parallel to the isobars or contours. This is due to variations in atmospheric pressure and temperature, as well as the Coriolis force resulting from the Earth's rotation. East-West wind patterns in the upper atmosphere are also influenced by these factors.Explanation:The question inquires about the direction of wind flow in relation to isobars or contour lines on an upper-level chart. In meteorological context,isobarsare lines on weather maps representing areas of equal pressure. Wind tends to flow parallel to these isobars, especially at upper levels of the atmosphere away from the influence of ground friction. Therefore, the correct answer is B. Parallel to the isobars or contours.Vector calculusspecifies how wind speed and direction change over time or distance. When there is a significant variation in pressure over a particular distance, wind strength increases as it attempts to correct the imbalance. Cold air, being more dense, carries a higher pressure and hastens towards areas of lower pressure. This movement is modified by the Earth's rotation, creating weather systems like cyclones.Furthermore, the direction of the airflow is affected by the Coriolis force, leading to characteristic wind patterns. For example, hurricanes in the Northern Hemisphere rotate counterclockwise, while those in the Southern Hemisphere rotate clockwise.East-West wind patternsin the atmosphere demonstrated by the giant planets are similarly influenced by rotational forces.Learn more about Wind patterns and isobars here:brainly.com/question/32346054#SPJ11...