a needle 5 cm long can just rest on the surface of water without wetting .what is its weight ?surface tension of water =0.07 N/m
Kindly refer the link for similar query.
https://www.meritnation.com/ask-answer/question/a-needle-is-of-length-7cm-if-water-does-not-wet-the-needle/mechanical-properties-of-fluids/6529939
https://www.meritnation.com/ask-answer/question/a-needle-is-of-length-7cm-if-water-does-not-wet-the-needle/mechanical-properties-of-fluids/6529939