Passage VII

When an object floats in a liquid, a fraction of the object extends above the surface of the liquid.

Seven objects with different densities were placed in containers of 4 different liquids. Table 1 lists the objects and their densities, in grams per cubic centimeter (g/cm³), at 15°C.

Table 2 lists the 4 liquids and their densities, in g/cm³, at 15°C.

Figure 1 shows, for each liquid, a graph of the fraction of each object extending above the liquid's surface versus the object's density, in g/cm³.

39. Suppose an object with a density of 0.99 g/cm³ floats in a container of water, and both the object and the water are at 15°C. If the temperatures of both the object and the water are raised to 90°C, and if the object neither expands nor contracts with the change in temperature, will the object more likely sink or remain afloat?

Answer and Explanation

Your Answer is

Correct Answer is B

Explanation

In the question stem, it is mentioned that the original density of the object is 0.99, which means that the density of the object and water is originally equal. But when the temperature of water rises from 15°C to 90°C, its density will continue to decrease (heat expansion and contraction), and because the title says that the volume of the object has not changed, so the density of the object has not changed, so this The density of the object should be greater than the density of water, so the object sinks sink