5. (a) How far must a zonal ring of air initially at rest with respect to the earth's surface at 60⁰ latitude and 100-km height be displaced latitudinally in order to acquire an easterly (east to west) component of 10 m s-¹ with respect to the Earth's surface? (b) To what height must it be displaced vertically in order to acquire the same velocity? [You may assume a frictionless atmosphere, and that the changes in y and z are small. [Holton 4.14]

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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5. (a) How far must a zonal ring of air initially at rest with respect to the earth's
surface at 60⁰ latitude and 100-km height be displaced latitudinally in order to
acquire an easterly (east to west) component of 10 m s-¹ with respect to the
Earth's surface?
(b) To what height must it be displaced vertically in order to acquire the same
velocity? [You may assume a frictionless atmosphere, and that the changes in
y and z are small. [Holton 4.14]
HINTS: Use the equation of motion for du/dt and multiply through by dt; or, using
the arguments of HH5 Sec:1.3.3 (or H4 Sec:1.5.3), conserve angular momentum
rx mu where m is the (conserved) mass of air in the ring.
Transcribed Image Text:5. (a) How far must a zonal ring of air initially at rest with respect to the earth's surface at 60⁰ latitude and 100-km height be displaced latitudinally in order to acquire an easterly (east to west) component of 10 m s-¹ with respect to the Earth's surface? (b) To what height must it be displaced vertically in order to acquire the same velocity? [You may assume a frictionless atmosphere, and that the changes in y and z are small. [Holton 4.14] HINTS: Use the equation of motion for du/dt and multiply through by dt; or, using the arguments of HH5 Sec:1.3.3 (or H4 Sec:1.5.3), conserve angular momentum rx mu where m is the (conserved) mass of air in the ring.
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