Question

40kgf/cm²=............................ Pa

Answer 1

Adotando a aceleração da gravidade $g=9,8\mathrm{~m/s^2},$ temos

$1\mathrm{~kgf}=(1\mathrm{~kg})\cdot (9,8\mathrm{~m/s^2})\\\\ 1\mathrm{~kgf}=9,8\mathrm{~N}$


Portanto,

$40~\dfrac{\mathrm{kgf}}{\mathrm{cm^2}}\\\\\\ =40\cdot\dfrac{9,8\mathrm{~N}}{\mathrm{cm^2}}\\\\\\\=40\cdot\dfrac{9,8\mathrm{~N}}{(10^{-2}\mathrm{~m})^2}\\\\\\ =40\cdot \dfrac{9,8\mathrm{~N}}{10^{-4}\mathrm{~m^2}}\\\\\\ =\dfrac{40\cdot 9,8}{10^{-4}}~\dfrac{\mathrm{N}}{\mathrm{m^2}}\\\\\\ =392\cdot 10^4~\dfrac{\mathrm{N}}{\mathrm{m^2}}\\\\\\ =3,92\cdot 10^6~\dfrac{\mathrm{N}}{\mathrm{m^2}}\\\\\\ \therefore~~\boxed{\begin{array}{c}40\mathrm{~kgf/cm^2}=3,92\cdot 10^6\mathrm{~Pa} \end{array}}$


Bons estudos! :-)