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The force of surface tension supports the needle on the surface but when the detergent is added, the surface tension reduces so the needle sinks.
johnmulu answered the question on February 6, 2017 at 08:26
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State ways of reducing surface tension in water.
Date posted: February 6, 2017. Answers (1)
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Date posted: February 6, 2017. Answers (1)
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Date posted: February 6, 2017. Answers (1)
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Date posted: February 6, 2017. Answers (1)
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Date posted: February 6, 2017. Answers (1)
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Date posted: February 6, 2017. Answers (1)
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Date posted: February 6, 2017. Answers (1)
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Date posted: February 6, 2017. Answers (1)
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Date posted: February 6, 2017. Answers (1)
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Date posted: February 6, 2017. Answers (1)
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Date posted: February 6, 2017. Answers (1)
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Date posted: February 6, 2017. Answers (1)
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Date posted: February 6, 2017. Answers (1)
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Date posted: January 16, 2017. Answers (1)
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State Archimedes' principle.
Date posted: January 16, 2017. Answers (1)
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Date posted: January 16, 2017. Answers (1)
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Date posted: January 16, 2017. Answers (1)