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An object has a mass of 35 kg when measured in air. It is then tied...

An object has a mass of 35 kg when measured in air. It is then tied to a string and immersed in water. The ten- sion in the string is now 280 N. Later, when immersed in oil the tension becomes 300 N. Find (a) the density of the object and (b) the density of the oil.

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