Physics Subject Test
313
ARCO
■
SAT II Subject Tests
w w w . p e t e r s o n s . c o m / a r c o
48. Which of the following illustrates a circuit
equivalent to the one shown above?
(A)
(B)
(C)
(D)
(E)
47. The graph above illustrates
the distribution of
molecular speeds for a pure sample at two dif-
ferent temperatures. The area under the curve
represents the percentage
of molecules at that
range of speed. The same number of molecules
are present at each temperature. Which of the
following statements accurately reflects the data?
(A) All the molecules
at the higher tempera-
ture have a greater speed than the mol-
ecules at the lower temperature.
(B) As the speeds increase the molecular size
decreases.
(C) The distribution
of speeds widens as the
temperature decreases.
(D) As the temperature increases, the aver-
age molecular speed increases.
(E) The number
of molecules at any given
speed is always greater for the sample at
the higher temperature.
Questions 48–49 relate to the schematic of the
following circuit .
Each labeled component
provides 5 ohms resistance.
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Lesson 11
314
w w w . p e t e r s o n s . c o m / a r c o
ARCO
■
SAT II Subject Tests
49. If
the current flowing across R
4
is 2 amperes,
what is the power dissipated by this component?
(A) 5 W
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