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The 4 forces that have a fundimental influence on the wind velocity are what?
- Pressure Gradiant,
- Coriolis Force,
- Centripetal force,
- Friction forces.
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Coriolis force acts at right angles to the (Isobars/wind direction?) and the 4 factors which determine it's strength are what?
Wind direction,
Earth spin, Air density, Wind Speed, Latitude.
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In the Southern hemisphere, air flowing out from a (low/high?) pressure system will deflect to it's (right/left?) which produces a (clockwise/anticlockwise?) around a (high/low?)
- High
- Left
- Anticlockwise,
- High
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When coriolis force is greater than the pressure gradient, the air will flow (clockwise/anticlockwise?) around a (high/low?) and vice versa
Anitclockwise - high
Clockwise - low
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When the wind flows paralell to straight isobars, the winds is called a (?) wind, and when it flows paralell to curved isobars it is called a (?) wind.
Geostrophic,
Gradient.
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When the friction layer is dense, the strength of the (pressure gradient/coriolis force?) reduces so that the wind starts to flow (across/parallel to?) the isobars, (inward to/parallel to/outward from?) the high.
Coriolis force,
Across,
Outward from.
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The wind is said to Veer when it's direction changes in a (clockwise/anticlockwise?) direction.
Clockwise
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After Sunrise in the southern hemisphere, the wind will (Veer/Back) and (increase/decresase?) in strength?
Back,
Increase.
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When decending into a dense friction layer in the southern hemisphere, the wind will (Veer/Back), and (increase/decrease?) in strength.
Veer , decrease
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The rotating cup anemometer measures the surface wind at approximatley ? meteres /agl, and measures the wind (speed/velocity?)
10 metres,
Speed
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Windsock speeds at sock degrees of
0
30
45
75
90?
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