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प्रश्न
One cubic plate, having a 15 cm side, floats on water surface. If surface tension of water is 60 dyne/cm. To lift this plate from water, Find the extra force required against weight.
पर्याय
3600 dyne
1800 dyne
900 dyne
7200 dyne
MCQ
उत्तर
3600 dyne
Explanation:
F = T × ℓ
= 60 dyne/cm × 15 cm × 4
= 3600 dyne
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Surface Tension and Surface Energy
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