If it is 10:00 A.M. EST in Washington, D.C., what is the time in San Diego, California, the longitude of which is 45° more westerly?
a. 1:00 P.M. PST
b. 7:00 A.M. PST
c. 10:00 A.M. PST
d. 9:00 A.M. PST
b
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The gravitational field on the surface of the earth is 
mass of the earth is 
kg, radius of the earth is
meters)
A. 3.40 N/kg. B. 6.20 N/kg. C. 9.80 N/kg. D. 10.1 N/kg. E. 20.3 N/kg.
Suppose that a particular chemical substance A is "pure" [contains no "impurities"], and that it can be chemically decomposed into two other pure materials B and C. What conclusion can be draw from this?
A) B and C must be elements. B) A must be a chemical compound. C) A must be an element. D) B and C must be chemical compounds. E) Nonsense--it is impossible to decompose a pure substance into two other materials.
Compared to the gravitational force on a 1 kg object, the gravitational force on a 2 kg object is
A) the same. B) nine times larger. C) four times larger. D) twice as large. E) None of the above.
Transistors are most useful devices electronic devices because
A. they are highly inductive. B. they are excellent signal amplifiers. C. they are excellent insulators. D. they are excellent conductors.