How does the largest asteroid, Ceres, compare in size to other solar system worlds?
A) It is larger than Pluto and Mercury.
B) It is about the size of a large jovian moon.
C) It is about the size of Pluto.
D) It is about a quarter the size of the Moon.
E) It is smaller than any jovian moon.
D
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On the vernal equinox the Sun is
a. 23.4° north of the celestial equator. b. 23.4° south of the celestial equator. c. on the celestial equator and moving north with respect to the equator. d. on the celestial equator and moving south with respect to the equator. e. closest to the north celestial pole.
A string with a mass per length of 2.00 g/m is stretched between two points that are 0.400 m apart. The second mode frequency of the stretched string is 50.0 Hz lower than the third mode frequency. What is the tension in the string?
A. 400 N B. 375 N C. 321 N D. 281 N E. 250 N
The source of energy that keeps the Sun shining today is
A) nuclear fission. B) nuclear fusion. C) gravitational contraction. D) chemical reactions.
Equal currents of magnitude I travel into the page in wire M and out of the page in wire N. Eight directions are indicated by letters A through H.
The direction of the magnetic field at point P is
A. C. B. E. C. F. D. G. E. H.