Question

Calcule o peso de uma esfera de mercúrio Hg com diâmetro igual a 1 metro.
Considere a massa específica do mercúrio igual a 13600 kg/m3.

Answer 1

Resposta:

$7.120,94\ N\ ou\ 7,1209\bullet10^3\ N$

Explicação:

$y=\frac{P}{V}\ (i)\\\\y=Peso/massa\ especifica=13.600\ kg/m^3\\\\N=Forca\ peso\\\\V=Volume\\\\D=Diametro=1\ m\\\\\\V=\frac{4}{3}\pi}r^3=\frac{4}{3}\pi}(0,5)^3\\\\V=\frac{4}{3}\pi}(0,125)\\\\V=\frac{1,5707}{3}=0,5235\ m^3$

$Substituindo\ os\ valores\ em\ (i)\ temos:\\\\13.600=\frac{P}{0,5235}\\\\P=13.600\bullet0,5235=7.120,94\ N\ ou\ 7,1209\bullet10^3\ N$