The strongest magnetic fields in the photosphere lie near
A) sunspots.
B) auroras.
C) prominences.
D) granules.
E) flares.
A
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Volcanism is apparent on many objects in the solar system. However, volcanic activity is known to be currently occurring only on Earth and Jupiter's satellite____________
Fill in the blank(s) with correct word
A concave mirror has a focal length of 20 cm. What is the magnification if the object and image distances are 10 cm and ?20 cm, respectively?
A. 1 B. 2 C. 1/2 D. 1/4 E. ?1/2
A 3.0-?F capacitor charged to 40 V and a 5.0-?F capacitor charged to 18 V are connected to each other, with the positive plate of each connected to the negative plate of the other. What is the final charge on the 3.0-?F capacitor?
A. 11 ?C B. 15 ?C C. 19 ?C D. 26 ?C E. 79 ?C
As a radio source, the period of "pulsar Earth" is
A) 30 minutes. B) 23 hours, 56 minutes. C) 24 hours. D) 29.5 days. E) 365.25 days.