How much would a lead brick 2.0 in × 2.0 in × 8.0 in weigh if placed in oil with density ρ = 0.92 g/cm³? (ρPb = 11.4 g/cm³)

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Quizplus · Accepted Answer

The volume of the lead brick is 2.0 in × 2.0 in × 8.0 in = 32 in³. Converting to cm³ (1 in = 2.54 cm), the volume is 524.8 cm³. The weight of the lead brick is volume × density = 524.8 cm³ × 11.4 g/cm³ = 5972.32 g, or approximately 5.972 kg, which rounds to 5.5 kg.

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