[tex]a)~V_{corp}=\Delta V=70-60=10~cm^3[/tex]
[tex]\rho_{corp}=\frac{m_{corp}}{V_{corp}}=\frac{27~g}{10~cm^3}=2,7~g/cm^3[/tex]
[tex]Este~din~aluminiu[/tex]
[tex]b)~G_{corp}=m_{corp}\cdot g=27\cdot10=270~N[/tex]
[tex]F=G_{corp}[/tex]
[tex]F=270~N[/tex]
[tex]\Delta l_{resort}=\frac{F}{k_{resort}}=\frac{270~N}{100~N/m}=2,7~m[/tex]