A sample of an unknown material appears to weigh 275 N in air and 160 N when imm

Question

A sample of an unknown material appears to weigh 275 N in air and 160 N when immersed in alcohol of specific gravity 0.700 (a) What is the volume of the material? Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. m3 (b) What is the density of the material? Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. kg/m3 Need Help? Talk to a Tutor

Explanation / Answer

b] Specific gravity = density of alcohol / density of air

here, specific gravity = 0.7

density of air = 1.225 kg/m3

therefore, density of the material (alcohol) will be:

D = 0.7 x 1.225 = 0.8575 kg/m3.

a]

Net force when immersed will be:

160 = 275 - VDg

=> 160 = 275 - V(0.8575)(9.8)

=> V = 13.685 m3.

this is the volume of alcohol.

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