Tidal forces in general are the result of
A) two or more sources of gravitation.
B) a combination of any kind of forces acting on a body.
C) unequal forces acting on different parts of a body.
D) the inverse-square law.
E) unequal fluid flow.
Answer: C
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Nuclear Reactions: The equation shows a fission reaction:
U + 
n ? 
Nb + X + 4 
nWhat is the missing term X in the equation?
A. 
Ag
B. 
Sb
C. 
Sb
D. 
Ag
E. 
Sb
Because he failed to observe stellar ________, Aristotle wrongly concluded we could not be in orbit around the Sun
Fill in the blank(s) with correct word
Although Saturn and Jupiter have similar compositions their outer appearances are different because
A. Saturn's cooler temperatures allow for the formation of a hazy layer of ammonia clouds that surrounds the planet. B. Saturn has more water molecules throughout its atmosphere giving it a uniform appearance. C. Saturn's smaller size means it has a weaker gravitational field and thus less dramatic atmospheric effects. D. Saturn's magnetic field is weaker than Jupiter's magnetic field.
The number of protons in a nucleus is the
a. mass number b. neutron number c. atomic number d. isotope number e. none of the above