Which of the following is farthest from the Sun?
A) Pluto
B) Neptune
C) an asteroid in the asteroid belt
D) a comet in the Kuiper belt
E) a comet in the Oort cloud
E
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A 60.0-kg person rides in an elevator while standing on a scale. The scale reads 400 N. The acceleration of the elevator is closest to
A) 3.13 m/s2 downward. B) 6.67 m/s2 downward. C) zero. D) 9.80 m/s2 downward. E) 6.67 m/s2 upward.
The ? alloys of titanium are precipitation-hardened by the precipitation of the _________phase by heat-treating at a temperature well below the ?-transus.
Fill in the blank(s) with the appropriate word(s).
Current: When current is flowing in an ordinary metal wire, the magnitude of the average velocity of the electrons is closest to
A. 10 m/s. B. the speed of light. C. 1 mm/s. D. 1 km/s. E. 1 m/s.
The mass of the Milky Way Galaxy can be estimated by:
A) the orbital motions of the stars within the galaxy. B) the mass of the planets in the Solar System. C) the luminosity of the stars of the neighboring galaxies. D) the concept laid down by the spiral density wave theory.