5.
[tex]Dane:\\d = 1000\frac{kg}{m^{3}}\\g = 10\frac{N}{kg}\\h = 6,5 \ m\\Szukane:\\h = 6,5 \ m\\\\p = d\cdot g\cdot h\\\\p = 1000\frac{kg}{m^{3}}\cdot10\frac{N}{kg}\cdot6,5 \ m\\\\\boxed{p = 65 \ 000 \ Pa = 65 \ kPa}[/tex]
6.
[tex]Dane:\\p = 12 \ 500 \ Pa\\g = 10\frac{N}{kg}\\d = 640\frac{kg}{m^{3}}\\Sukane:\\h = ?\\\\p = d\cdot g\cdot h \ \ /:(d\cdot g)\\\\h = \frac{p}{d\cdot g}\\\\h = \frac{12 \ 500 \ Pa}{640\frac{kg}{m^{3}}\cdot10\frac{N}{kg}}=\frac{12 \ 500\frac{N}{m^{2}}}{6 \ 400\frac{N}{m^{3}}}\\\\\boxed{h\approx1,95 \ m}[/tex]
