Identify a true statement about carbonaceous chondrites
A) They contain significant amounts of helium.
B) They contain abundant volatile compounds.
C) They have been heated many times since their formation.
D) They are the most-altered remains of the solar nebula.
B
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Common erosional shoreline features include sea stacks,
A) beaches, and barrier islands. B) wave-cut platforms, sea caves, and sea arches. C) sea caves, sea arches, and atolls. D) wave-cut platforms, sea caves, and sea spits.
Consider two parallel wires carrying current in the same direction. Which one of the following statements to true concerning this situation?
a) The two wires will attract each other, even if no external magnetic field is applied to the wires. b) The two wires will repel each other, even if no external magnetic field is applied to the wires. c) The two wires will attract each other, only if an external magnetic field is applied to the wires. d) The two wires will repel each other, only if an external magnetic field is applied to the wires. e) The wires will be neither attracted nor repelled from each other when no external magnetic field is applied to the wires.
Hundreds of complex organic molecules exist in deep space, especially in the giant molecular clouds
Indicate whether the statement is true or false
Compared to a smaller-objective lens, a larger-objective lens makes a star's image
a. brighter. b. dimmer. c. no effect.