Physics

Physics

Problem

A composite block contains

0.008\,\text{m}^3

of pine wood with density

500\,\text{kg m}^{-3}

and

0.002\,\text{m}^3

of iron with density

7.8\times10^{3}\,\text{kg m}^{-3}

. What is the block’s average density? a)

9.80\times10^{2}\,\text{kg m}^{-3}

b)

4.15\times10^{3}\,\text{kg m}^{-3}

c)

1.96\times10^{3}\,\text{kg m}^{-3}

d)

6.50\times10^{2}\,\text{kg m}^{-3}

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