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You have a block of a mystery material, 12 cm long, 11 cm wide and 3.5 cm thick. Its mass is 1155 grams. (a) What is its density?

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You have a block of a mystery material, 12 cm long, 11 cm wide and 3.5 cm thick. Its mass is 1155 grams.

(a) What is its density? 

(b) Will it float in a tank of water, or sink?

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(a) Density 

= \(\frac{Mass}{Volume}\) = \(\frac{1155g}{12cm \times 11 \times3.5 cm}\) = \(\frac{1155g}{462 cm^3}\) = 2.5 g cm-3

(b) The mystery material is denser than the water, so it sinks

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