Three identical cubes P, Q and R each have a volume of

PHYSICS · Single correct · AP · Physics 1: Algebra-based · Fluids · Fluids

Problem

Three identical cubes P, Q and R each have a volume of 100 cm3100\,\text{cm}^3. Their masses are 60 g60\,\text{g}, 110 g110\,\text{g} and 140 g140\,\text{g} respectively. All three are gently released in glycerine of density 1.3 g cm−31.3\,\text{g\,cm}^{-3}. Which one of the following statements is correct? (a) Only P floats; Q and R sink to the bottom. (b) R floats; Q remains suspended; P sinks. (c) P and Q float; R sinks to the bottom. (d) P floats; Q remains suspended; R sinks to the bottom.

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