A rock is suspended by a light string. When the rock is in air, the tension in the string is 39.2 N. When the rock is totally immersed in water, the tension is 28.4 N. When the rock is totally immersed in an unknown liquid, the tension is 18.6 N. The density of water is 1000 kg/m3. What is the density of the unknown liquid(in kg/m3)?

Inquiry into Physics
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Author:Ostdiek
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Chapter4: Physics Of Matter
Section: Chapter Questions
Problem 26P: . A juniper-wood plank measuring 0.25 ft by 1 ft by 16 ft is totally submerged in water, (a) What is...
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A rock is suspended by a light string. When the rock is in air, the tension in the string is 39.2 N. When the rock is totally immersed in water, the tension is 28.4 N. When the rock is totally immersed in an unknown liquid, the tension is 18.6 N. The density of water is 1000 kg/m3. What is the density of the unknown liquid(in kg/m3)?

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