http://slideplayer.com/3620006/13/images/5/Figure+94-4+A+one-pound+force+exerted+on+a+small+piston+in+a+sealed+system+transfers+the+pressure+to+each+square+inch+throughout+the+system.+In+this+example%2C+the+1-lb+force+is+able+to+lift+a+100-lb+weight+because+it+is+supported+by+a+piston+that+is+100+times+larger+in+area+than+the+small+piston..jpg