2 . J Tables 1, 2, and 3 all show that P increases when V increases. Choice (J) reflects this trend.
3 . C Look at Tables 1–3 to compare trials with different resistances and the same voltage. Take
trials 2, 7, and 12, for example, which all have the same voltage. Trial 12 has the highest
resistance, and Trial 2 has the lowest. Trial 12, however, has the lowest power, and Trial 2
has the highest. Therefore, as resistance increases, power decreases, and so (C) is the
correct answer.
4 . F Conductance (G) is defined in the passage as the inverse of resistance (R). The passage states
that Study 1 has the lowest resistance and therefore the greatest conductance. Since the
resistance differs between the three studies, eliminate (J). Choice (F) is correct because it is
the only answer choice in Study 1.
5 . C Since the different circuits had different power outputs at a given voltage, (D) is incorrect.
Compare three trials, one from each study, that have the same voltage. Trials 1, 6, and 11
show that the power output is lowest for a given voltage in Study 3.
6 . J Inspect each pair of trials to determine which has the same resistance, 3 times the value of V,
and 9 times the value of P. Eliminate (F) and (H) because the trials are in different studies,
so the value of R is not constant. Choice (G) is incorrect because the value of V in Trial 4 is
double that in Trial 2, and the value of P is 4 times greater. Choice (J) shows the correct
relationship.
Passage V
1 . D During thermal expansion of the metal rod, the only variable that changes according to the
passage is the volume. Since density is defined as mass divided by volume, when the thermal
expansion causes an increase in volume, the density decreases.
2 . H The data in Table 3 shows that ΔV for 60°C is 7.7 mm^3 and ΔV for 80°C is 10.2 mm^3 . Since
70°C is between these two values, the corresponding value of ΔV should be between 7.7
mm^3 and 10.2 mm^3 , so the answer is (H).
3 . B The question states that thermal energy is proportional to the product of incubation time and
initial length. In each Study, incubation time is held constant. Use POE, and look for the Trial
with the greatest initial length, as in (B).
4 . F According to Table 1, the two variables are the length of the metal rod (L) and the change in
volume of the metal rod (ΔV). Notice that as L increases, ΔV increases. Choices (G) and (H)
display a relationship between β and ΔV, which is part of Study 2, not Study 1. Choice (J)
