Homework Help: Intro to Physics

Posted by Amy on Wednesday, November 7, 2012 at 9:43pm.

A sample of an unknown material appears to weigh 295 N in air and 165 N when immersed in alcohol of specific gravity 0.700.
(a) What is the volume of the material?
___________m^3

(b) What is the density of the material?
____________ kg/m3

I am getting the wrong answer. Can you please check my work? My answer is off by a multiple of ten.

Intro to Physics - Amy, Wednesday, November 7, 2012 at 9:46pm
This is what I have so far. My answer is wrong, it is off by a multiple of 10
295N-165N=130N

F=pVg
130N=(.700)V(9.8m/s^2)
V=18.93

F=mg
295N=m(9.8)
m=30.10kg

pV=m
p(18.93)=30.10
p=1.59kg/m^3
Intro to Physics - Cristina, Tuesday, November 13, 2012 at 10:26pm
You have to divide the volume by 1000

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