Passage VI
The pressure,
, exerted by a liquid varies with the depth, D, below the surface of the liquid and with the liquid’s density, ρ. If a tank of liquid is open to the atmosphere, the total pressure,
, at D equalsat D plus the atmospheric pressure,
.
Table 1 lists ρ, in kilograms per cubic meter (kg/m³), for 4 liquids at 25℃.
Figure 1 shows, for D = 10 m, a graph of (in kilo-pascals, kPa) versus ρ (1 kPa = 
Pa =newtons/㎡). Figure 2 shows a graph of versus D and a graph ofversus D for 25℃ water in a tank that was open to the atmosphere on a particular day.
31. Based on Table 1 and Figure 1, compared to at D = 10 m in 25℃ ethanol, at D = 10 m in 25℃ carbon tetrachloride will be approximately:
Your Answer is
Correct Answer is C
Explanation
According to figure 1, the greater the density, the greater the PL, and the two are proportional, so the density of carbon tetrachloride is about twice that of ethanol, so its PL should also be twice that of ethanol