Venus may have been more Earth-like in the past because
A) it was rotating more rapidly
B) the Sun was dimmer, putting out less solar radiation
C) it was not as close to the Sun
D) its atmosphere was thinner
B
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The heaviest element produced by stars or in supernovae is silicon
Indicate whether the statement is true or false
A circular coil of copper wire is lying flat on a horizontal table. A bar magnet is held with its south pole downward, vertically above the center of the coil. The magnet is kept stationary with respect to the coil
As viewed from above, you can say that the magnet induces A) counterclockwise current in the loop. B) clockwise current in the loop. C) no current in the loop. D) an emf but no electric current in the loop. E) Not enough information is provided.
The person who developed the exclusion principle was __________
Fill in the blank(s) with correct word
About 78% of the air is composed of
a)carbon dioxide. b)oxygen. c)nitrogen. d)argon.