A rock is suspended by a light string. When the rock is in air, the tension...

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A rock is suspended by a light string. When the rock is in air, the tension...

A rock is suspended by a light string. When the rock is in air, the tension in the string is 52.9 N . When the rock is totally immersed in water, the tension is 39.6 N . When the rock is totally immersed in an unknown liquid, the tension is 21.4 N .

What is the density of the unknown liquid?

Express your answer with the appropriate units.

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