A ________ is believed to occur when energy, stored in a twist in the solar magnetic field above a sunspot, is suddenly released
a. solar flare
b. supergranule
c. spicule
d. coronal hole
e. none of the others
a
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The Sun is rising in the east and will be on your meridian in 2 hours. What time is it?
A) 2 A.M. B) 2 P.M. C) 10 A.M. D) 10 P.M. E) noon
A charged particle enters a region of magnetic field at a speed of 2.8 x 104 m/s, at an angle of 37 degrees relative to the magnetic field direction. What will be the magnitude of the component of the particle’s velocity that is parallel to the magnetic field while it is in this region?
A. Insufficient information is given.
B. 
C. 
D. 
E.
A ball thrown upward reaches its maximum height and then falls back. If air resistance is negligible, its acceleration is
A. the same at all points in the motion. B. less on the way up than on the way down. C. the same up and down but zero at the top. D. less on the way down than on the way up.
Show that the conservation of mass equation is satisfied by the stream function ? which satisfies
