posted by really need help with this one, cant get it .
A tank contains mercury, whose density is 13 600 kg/m3. Find the force exerted by the mercury on a circular plug at the bottom of the tank. The plug has a diameter of 2.54 cm, and is located 37.6 cm below the surface of the mercury.
volume of cylinder above the plug
V=AreaPlug*heightmercury (note volume in cm^3)
change volume to meters cubed
now the weight of the mercury in that cylinder is density*g*volume