Question 1 a particular object weighs 343 n in air and 144, Ask an Expert

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Question 1: A particular object weighs 343 N in air and 144 N when immersed in alcohol of density 0.7 g/cm³. What are the volume and the density of the object?

Question 2: In order to lift a wire ring of radius 2.25 cm from the surface of a container of blood plasma, a vertical force of 1.30 x 10^-2 N greater than the weight of the ring is required. Calculate the surface tension of blood plasma from this information.

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