<span>Дано</span>
<span>m</span>1=<span>m</span>2<em><span>
</span></em><em><span>ρ2</span></em><span>=2300кг/м3</span>
<em><span>ρ</span></em><em><span>1</span></em><span>=</span><span>8900кг/м3</span>
<span>V</span><span>2/</span><span>V</span><span>1-?</span>
<span>V</span><span>=</span><span>m</span><span>/</span><em /><em><span>ρ</span></em><span /><span><span> </span>, </span><span>V</span><span>1=</span><span>m</span><span>1/</span><em /><em><span>ρ</span></em><em><span>1</span></em><span /><span>, </span><span>V</span><span>2=</span><span>m</span><span>2/</span><em /><em><span>ρ</span></em><em><span>2</span></em><span /><span>, </span><span>V</span><span>2/</span><span>V</span><span>1=</span><span>m</span><span>2*</span><em /><em><span>ρ</span></em><em><span>2</span></em><span>/</span><span>m</span><span>1*</span><em /><em><span>ρ</span></em><em><span>1</span></em><span>=</span><em /><em><span>ρ</span></em><em><span>2</span></em><span>/</span><em /><em><span>ρ</span></em><em><span>1</span></em><span />
<span> </span>
<span>V</span><span>2/</span><span>V</span><span>1</span><span>=8900/2300=3,87</span>