PLISS NA TERAZ JUZZZZ DAJE 20 PKT !!!

p = 15kPaFg = 25NS = 0,03[latex] m^{2} [/latex]h(cegły) = 25 p = [latex] frac{Fn}{s} [/latex]Fn = 25Np = [latex]frac{25N}{0,03 m^{2} } [/latex] = [latex] frac{2 500}{3} [/latex]Pa = 883 i [latex] frac{1}{3} [/latex]Pa833 i [latex] frac{1}{3} [/latex]Pa * x = 15000Pax = 15 000Pa : [latex] frac{2500}{3} [/latex]Pa = [latex] frac{15000*3}{2500} [/latex] = 18h = 0,25m * 18 = 4,50m