How would sunspots appear if you could magically remove them from the Sun?
A) They would appear blue-white, like Sirius but brighter.
B) Because sunspots are dark spots, they would be invisible against the blackness of space.
C) They would shine bright orange in color, like Arcturus.
D) They would not appear any differently than on the surface of the Sun.
E) They would shine only with reflected sunlight, appearing similar to Venus.
C
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The presence of vesicular basalts among the lunar rock samples shows that
a. the lunar surface was fragmented by meteorite impacts. b. volcanism did not occur on the Moon. c. the crust must have been made of anorthosite. d. molten lava once flowed over the lunar surface. e. the Moon was once hit by a very large meteorite.
What is the identity of stomach acid?
a. HC2H3O2 b. H2CO3 c. HCl d. H3PO4
The magnetic fields of Uranus and Neptune are peculiar in that they are
a. highly inclined to their planet's axis of rotation. b. very weak (virtually zero). c. produced by the solar wind. d. produced by disturbances caused by the orbits of the moons. e. all of the above
A scalar quantity multiplied by a unit vector is a scalar quantity
Indicate whether the statement is true or false