Mention two ways of reducing the surface tension of water.?
Ettasco
7 Jul, 2026
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Charlie2022
20 Jun, 2023
An observer standing at a point on the same horizontal ground at a plot A of a tower shout and 1.20seconds later he hears the echo,he then move to another point B, 40cm from P and shout again but the echo was heard at 1.45seconds. calculate: Distance between P and H The speed of sound in air?
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