Homework Help: Physics Help Please

Posted by A on Friday, November 12, 2010 at 1:03pm.

A sample of an unknown material appears to weigh 270 N in air and 165 N when immersed in alcohol of specific gravity 0.700.
(a) What is the volume of the material?

(b) What is the density of the material?

Physics Help Please - bobpursley, Friday, November 12, 2010 at 1:18pm
YOu know immersed, its bouyancy force is equal to the weight of the displaced medium; Archimedes discovered that. change specific gravity to density.

270-165=densityalcohol*volumedisplaced*g

solve for volume displaced, duh, double duh, that is the volume

density= mass/volume= 270/g * 1/volume in kg/m^3

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