You intend to gently place several steel needles on the free

Last updated: 6/10/2023

You intend to gently place several steel needles on the free surface of the water in a large tank The needle come in two lengths some are 5 cm long and some are 10 cm long Needles of each length are available with diameters of 1mm 2 5 mm and 5mm Surface tension of water 0 072 N m angle of contact is 0 and density of steel is 7 8 gm cm A All needles will float B Only 1mm diameter needles will float C Only needles with diameters 1mm and 2 5 mm will float D All needles will sink