Respostas

2013-05-15T11:40:39-03:00

Massa:

 

m_A=d_A\cdot{v_A}

m_A=0,78\cdot{120}

m_A=93,6g

 

m_B=d_B\cdot{v_B}

m_B=0,56\cdot{200}

m_B=112g

 

Densidade:

 

d_{AB}=\frac{m_A+m_B}{v_A+v_B}

 

d_{AB}=\frac{93,6+112}{120+200}

 

d_{AB}=\frac{205,6}{320}

 

\boxed{d_{AB}=0,6425g/cm^3}

2 5 2