Answer
Damuwar $S$ a cikin magudanar ruwa ya yi daidai da murabba'in adadin taguwar ruwa $Z$. Musamman, $S \propto \frac{1}{Z^2}$. Ƙara $Z$ yana da mahimmanci yana rage damuwa na lanƙwasawa don jujjuyawar da aka bayar, wanda ke da mahimmanci don tsawaita rayuwar gajiya. Don gajiya mai girma (misali,> 1 miliyan hawan keke), injiniyoyi dole ne su tabbatar da matsakaicin matsananciyar damuwa a tsayin aiki ya kasance a ƙasa da iyakar gajiyar kayan, sau da yawa ana magana ta hanyar zane na Goodman. Don 17-7PH CH900, iyakar ƙira yawanci kusan 45% na ƙaramin ƙarfi don aikace-aikacen keke.