____ are small luminous nebulae excited by nearby young stars
a. T Tauri stars
b. Herbig-Haro objects
c. O associations
d. Bok Globule
e. Giant molecular clouds
B
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The process of planet formation in the early solar system is best described by which of the following terms?
A) precipitation B) consolidation C) condensation D) crystallization
A person is lowering a bucket into a well with a constant speed. The force exerted by the rope on the bucket is
A) equal to the bucket's weight. B) greater than the bucket's weight. C) less than the bucket's weight, but not zero N. D) zero N. E) Cannot be determined without additional information.
Which of the following would violate the law of charge conservation?
a. A neutron, which has zero charge, becoming an electron and a proton. b. A plastic rod becoming charged by gaining electrons from the fur rubbed against it. c. A glass rod becoming positively charged by being rubbed with silk. d. An electroscope losing its charge by being grounded. e. An electron becoming a positron which has the same mass as an electron and a positive charge of the same magnitude.
ABS is a(n) _________of PAN, BR, and PS.
Fill in the blank(s) with the appropriate word(s).