Chapter08b

# Chapter08b - Air Pressure and Winds II density of an ideal...

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Air Pressure and Winds II

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RECAP Ideal gas law : how the pressure, thetemperature and thedensity of an ideal gas relay to each other. C T P × × = ρ Pressure and pressure measurements Constant height charts: isobars Constant pressure charts: contour lines Note wind direction in NH L ow P -> Cyclones H igh P -> Anticyclones
Isobaric chart Constant pressure, P=500 mb, then plot heights: contour lines Pressures on surface maps <-> Heights on isobaric charts Low <-> Low High <-> High Pressure <-> Temperature Low <-> Low High <-> High Note wind direction here Different from surfacewinds Along the contour lines, no crossing

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Newton’s Laws of Motion Newton’s First Law : an object will stay at rest , or maintain its motion at a constant velocity and in a straight line as long as no force is exerted on the object , or all forces cancel each other Says who? An observer at rest G F G F F drag total + =
Newton’s Second Law The force (F) experienced by an object is equal to its mass (m) times the resulting acceleration (a).

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