__________is an 18-year, 11 -day period after which the pattern of lunar and solar eclipses repeats
A) The Sothic cycle
B) The Saros cycle
C) The CNO cycle
D) A Milankovitch cycle
B
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Two masses m1 and m2, with m1 = 3 m2, undergo a head-on elastic collision. If the particles were approaching with speed v before the collision, with what speed are they moving apart after collision?
a. v c. 3v/4 b. v/3 d. 3v
It used to be thought that both of Mars' moons were captured asteroids. Information from Mars Express and Mars Global Surveyor has led to the conclusion that Phobos may have formed by a different process. Briefly describe that process
What will be an ideal response?
Every location on the celestial sphere is part of some
a. degree. b. tropic. c. constellation. d. sign.
A magnetic field is generated by a current-carrying wire. Which one of the following statements concerning this situation is false?
a) The magnitude of this magnetic field decreases with increasing distance away from the wire. b) A right-hand rule is useful for determining the direction of the magnetic field at a particular location. c) The magnitude of the magnetic field is directly proportional to the magnitude of the current. d) The magnetic field is parallel to the direction of the current in the wire.