GEOG 1001 Study Guide - Midterm Guide: Ionosphere, Thermosphere, Thermodynamics

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amethystgnat297

22 Apr 2019

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6 i it&i4"-cfiendm oif-fijcdatltjti1: none of the above are true, which layer of the atmosphere has the highest atmospheric pressure? h> i"iopgsphefd fil]mesosphere m:jpressure is the same in all the layers ln]thermosphere l>]ionosphere. Consider the figure drawn below to answer the next four questions: K u i;ct,p~ r -(. , lj( ,o

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9.19. Using Appendix F, along with the fact that the earth spins on its axis once per day, calculate (a) the earth's orbital angular speed (in rad/s) due to its motion around the sun, (b) its angular speed (in rad/s) due to its axial spin, (c) the tangential speed of the earth around the sun (assuming a circular orbit), (d) the tangential speed of a point on the earth's equator due to the planet's axial spin, and (c) the radial and tangential acceleration components of the point in part (d).

calculate the angular momentum of the earth in its orbit around the sun?

m   5.97 10 kg 6 E R   6.38 10 m Orbital radius 11 r   1.50 10 m Period of rotation Prot = 24 h 86,400 s  Period of revolution Prev = 7 1 y 3.156 10 s   Identify: L I z z   Set Up: For a particle of mass m moving in a circular path at a distance r from the axis, 2 I mr  and v r   . For a uniform sphere of mass M and radius R and an axis through its center, 2 2 5 I MR  . The earth has mass 24 E m   5.97 10 kg , radius 6 E R   6.38 10 m and orbit radius 11 r   1.50 10 m . The earth completes one rotation on its axis in 24 h 86,400 s  and one orbit in 7 1 y 3.156 10 s   . Execute: (a) 2 24 11 2 40 2 7 2 rad (5.97 10 kg)(1.50 10 m) 2.67 10 kg m /s 3.156 10 s L I mr z z z                   . The radius of the earth is much less than its orbit radius, so it is very reasonable to model it as a particle for this calculation. (b)   2 2 2 24 6 2 33 2 5 5 2 rad (5.97 10 kg)(6.38 10 m) 7.07 10 kg m /s 86,400 s L I MR z z                  Evaluate: The angular momentum associated with each of these motions is very large. Note that the orbital angular momentum is over 7 orders of magnitude greater than its rotational angular momentum. In fact, most of the total angular momentum of the solar system comes from the sum of the orbital angular momenta of its planets.

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GEOG 1001 Study Guide - Midterm Guide: Ionosphere, Thermosphere, Thermodynamics

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