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Question

Consider following statements about coriolis force. 1. This force states that the winds in the northern hemisphere will be deflected to the right hand side while in southern hemisphere the winds will be deflected to left. 2. The coriolis force is minimum at the equator while it increase poleward. Select the correct statements:

A

1 only

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B

2 only

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C

Both

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D

None

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Solution

The correct option is C Both The key to the Coriolis effect lies in the Earth’s rotation. The Earth rotates faster at the Equator than it does at the poles. This is because the Earth is wider at the Equator. A point on the Equator has farther to travel in a day. In the Northern Hemisphere, wind from high-pressure systems pass low-pressure systems on the right. This causes the system to swirl counter-clockwise. Low-pressure systems usually bring storms. This means that hurricanes and other storms swirl counter-clockwise in the Northern Hemisphere. In the Southern Hemisphere, storms swirl clockwise. Fast-moving objects such as airplanes and rockets are influenced by the Coriolis Effect. Pilots must take the Earth’s rotation into account when charting flights over long distances. This means most planes are not flown in straight lines, even if the airports are directly across the continent from each other. The Earth rotates fairly slowly, compared with other planets. The slow rotation of the Earth means the Coriolis Effect is not strong enough to be seen in small movements, such as the draining of water in a bathtub.

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