Twenty kilometers is
a. 200,000 m
b. 20,000 m
c. 2,000 m
d. 200 m
e. 0.02 m
B
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Household 120-V outlets are made to accept three-pronged plugs. One of the prongs attaches to the "live" wire at 120 V, and another attaches to the "neutral" wire that is connected to ground. What is the round third prong for?
a. It serves as a backup to the hot wire. b. Nothing electrical, it is for mechanical sturdiness. c. It connects the case of the appliance directly to ground for safety purposes. d. It lets the appliance run if the neutral wire breaks.
Identify a true statement about asterisms and constellations
A) They are made up of stars that are not physically associated with one another. B) They are made up of stars that are of the same brightness. C) They are made up of stars that lie in different directions when viewed from Earth. D) They are made up of stars that do not move through space in different directions.
A cluster with a lot of Type O and B stars, but no bright K or M stars, is very
A) faint. B) poor in heavy elements. C) young. D) old. E) densely packed.
The requirement to use powder metallurgy techniques makes oxide dispersion strengthened metals _________in comparison to other metal strengthening techniques.
Fill in the blank(s) with the appropriate word(s).