Differential rotation of the Sun is
a. heating in the chromosphere and corona that makes them hotter than the photosphere.
b. the magnetic dynamo inside the Sun.
c. the equatorial regions of the Sun rotating more rapidly than the polar regions.
d. the origin (and subsequent disappearance of) Sunspots first near the poles then closer to the Sun's equator as the Sunspot cycle progresses.
e. the rotation of the Sun's southern and northern hemispheres in opposite directions.
Question 2
Kepler's second law implies that
a. a planet should move at its greatest speed when it is closest to the Sun.
b. the most massive planets will have the greatest speed in their orbits.
c. the speed of a planet in its orbit depends on the size of the epicycle.
d. the mass of the planet determines how far the planet is from the Sun.
e. the deferent and the epicycle have to be attached to the Sun and not Earth.
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