1.
[tex]300 \ kPa = 300 \ 000 \ Pa\\\\25 \ MPa = 25 \ 000 \ 000 \ Pa\\\\8 \ mm^{2} = 0,000008 \ m^{2}[/tex]
2.
[tex]a)\\p = \frac{F}{S}\\\\p_1 = \frac{6F}{S}=6p[/tex]
Odp. Ciśnienie wzrośnie 6 razy.
[tex]b)\\p = \frac{F}{S}\\\\p_2 = \frac{F}{\frac{S}{4}} = \frac{4F}{S}=4p[/tex]
Odp. Ciśnienie wzrośnie 4 razy
3.
[tex]Dane:\\S = 5 \ cm^{2} = 0,0005 \ m^{2}\\m = 50 \ kg\\g = 10\frac{N}{kg}\\Szukane:\\p = ?\\\\p = \frac{F}{S}\\\\ale \ \ F = m\cdot g = 50 \ kg\cdot10\frac{N}{kg} = 500 \ N\\\\p = \frac{500 \ N}{0,0005 \ m^{2}}\\\\\boxed{p = 1 \ 000 \ 000 \ Pa = 1 \ MPa}[/tex]
