Physics, 05.09.2019 17:30, cameronrandom00

Arock is suspended by a light string. when the rock is in air, the tension in the string is 42.2 n . when the rock is totally immersed in water, the tension is 30.6 n . when the rock is totally immersed in an unknown liquid, the tension is 21.0 n . what is the density of the unknown liquid?

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Arock is suspended by a light string. when the rock is in air, the tension in the string is 42.2 n ....