Question

Which of the following statements about the density of the blue object is true? Floating block

A. The blue object has a density less than 1 g/cm3.
B. The blue object has a density of exactly 1 g/cm3.
C. The blue object has a density greater than 1 g/cm3.
D. None of the conclusions above is certain.

Answer 1

The correct statement about the density of the blue object that floats is A. The blue object has a density of less than 1 g/cm³, as it is less dense than water, which allows it to float.

Step-by-step explanation:

The density of an object determines whether it will float or sink in a fluid, such as water. If an object's density is less than the density of the fluid, it will float because the fluid, being denser, exerts a greater buoyant force than the weight of the object. Conversely, if an object has a greater density than the fluid, it will sink. Given that 90% of a polystyrene cube is floating above the water surface, we can ascertain that the density of the polystyrene is less than 1 g/cm3, which is the density of water. Therefore, the correct statement about the density of the blue object is A. The blue object has a density of less than 1 g/cm3.