The chromosphere of the Sun
a. is hotter than the photosphere.
b. appears yellow-white in color during total solar eclipse.
c. is the visible surface of the Sun.
d. produces an absorption spectrum.
e. all of the others.
a
You might also like to view...
Torque: In the figure, the rectangular loop is pivoted about one side (of length 0.060 m), that coincides with the y-axis. The end (length 0.020 m) of the loop that lies in the xz-plane makes an angle of 37° with the x-axis as shown. The loop carries a current of I = 69 A in the direction shown. (In the side of the loop that is along the y-axis the current is in the +y direction.) If there is a uniform magnetic field of magnitude 9.7 T in the -x direction, find the magnitude of the torque that this magnetic field exerts on the loop.
Fill in the blank(s) with the appropriate word(s).
The sharply defined boundary that separates the crust from the mantle is called ______________
a. the lithosphere b. the asthenosphere c. the Mohorovicic discontinuity d. none of the above.
A certain CD-ROM disk can store approximately 6.0 × 102 megabytes of information, where 106 bytes = 1 megabyte. If an average word requires 9.0 bytes of storage, how many words can be stored on one disk?
A) 6.7 × 107 words B) 5.4 × 109 words C) 2.1 × 107 words D) 2.0 × 109 words
The lookback time of the cosmological horizon is
A) the age of the universe. B) the Big Bang . C) 1 billion years. D) 10 billion years.