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### 13 Cards in this Set

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 Newton's second law of motion Acceleration of an object is proportional to the net force applied -F prop. a Force equals mass x acceleration pressure gradient The amount of pressure change that occurs over a given horizontal distance The stronger the PGF (steeper gradient) the stronger the wind Coriolis force Arises from fact that earth is a rotating frame of reference, not stationary changes wind direction, not wind speed To be significant, the air must be MOVING; it must NOT be on the equator (0° latitude); and it must be LARGE SCALE. Net result: winds deflected to the RIGHT in the N.H. particulate matter -particles may remain suspended in the atmosphere for several weeks -particles are small enough to penetrate into the lungs -particles can cause a significant reduction in visibility This gas will replace oxygen in blood hemoglobin and thereby reduce the transport of oxygen to the brain carbon monoxide (CO) Newton's first law of motion An object at rest will remain at rest, or remains moving in a straight line, unless acted upon by a force(s). if an object is changing direction (e.g., wind blowing around a low pressure system) then: A force must be acting on it It must be accelerating Centripetal force derived from: center + towards) found where wind circulates around a Low or High. It must exist because wind flowing around a curve (e.g., L or H) is accelerating (Newton’s second law) (see section 3, below) Frictional force reduces wind speed due to surface roughness such as mountains, forests, Geostrophic wind straight line motion, parallel to contour lines Gradient wind curved path around low/high pressure centers in upper atmosphere Cyclonic flow counterclockwise around a Low (in N.H Anticyclonic flow clockwise around a High (in N.H.)