Astronomers have decided that, rather than being a planet, Pluto is really just a large member of
A) the asteroid belt.
B) the Kuiper belt.
C) the Oort cloud.
D) the moon system around Neptune.
E) an extrasolar planetary system.
B
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You discover a binary star system in which one member is a 15MSun main-sequence star and the other star is a 10MSun giant. Why should you be surprised, at least at first?
A) It doesn't make sense to find a giant in a binary star system. B) The odds of ever finding two such massive stars in the same binary system are so small as to make it inconceivable that such a system could be discovered. C) The two stars in a binary system should both be at the same point in stellar evolution; that is, they should either both be main-sequence stars or both be giants. D) The two stars should be the same age, so the more massive one should have become a giant first. E) A star with a mass of 15MSun is too big to be a main-sequence star.
A 0.16 pF parallel-plate capacitor is charged to 10 V. Then the battery is disconnected from the capacitor. When 1.00 × 10^7 positive charges of magnitude |e| are now placed on the positive plate of the capacitor, the voltage between the plates changes by
a. ?5.0 V. b. ?1.1 V. c. 0 V. d. +1.1 V. e. +5.0 V.
An object whose center of gravity is above its base of support will be stable if a vertical line projected downward from the center of gravity falls within the base of support
Indicate whether the statement is true or false
In a relay race, runner A is carrying the baton and has a speed of 3.00 m/s. When he is 25.0 m behind the starting line, runner B starts from rest and accelerates at 0.100 m/s2
How long afterwards will A catch up with B to pass the baton to B? A) 5.17 s B) 10.0 s C) 11.9 s D) 20.4 s E) A never catches up.