September 14th, 2009, 05:47 PM  #1 
Newbie Joined: Feb 2009 Posts: 6 Thanks: 0  Word problem
A sheet of metal is 29.4 mm wide and 16.1 mm long. If it weighs 4.093 g and the density of the metal is 7.23 g/cm3, what is the thickness of the sheet (in mm)? What I found out... Here's how I worked this problem: The Density Conversion: 7.23g/cm^3 / 10mm = 0.723 g/mm^3 The volume calculation: V = m/d V = 4.093g / 0.723 g/mm^3 = 5.66 mL The rearrangement: V = (29.4mm)(16.1mm)t t = (5.66mm) / (29.4mm) * (16.1mm) = 0.011957578mm This doesn't seem correct to me however, did I work this question correctly? 
September 14th, 2009, 06:51 PM  #2  
Global Moderator Joined: May 2007 Posts: 6,704 Thanks: 670  Re: Word problem Quote:
 
September 14th, 2009, 07:36 PM  #3  
Newbie Joined: Feb 2009 Posts: 6 Thanks: 0  Re: Word problem Quote:
7.23 g/cm^3 / 1000 = 0.00723 V = M / D V = 4.093 / 0.00723 V = 566.113463 V = (29.4)(16.1)*t t = 566.113463 / (29.4)(16.1) t = 1.19mm Are all these units correct here and the rework itself? Thanks for catching that error BTW.  
September 15th, 2009, 03:48 PM  #4 
Global Moderator Joined: May 2007 Posts: 6,704 Thanks: 670  Re: Word problem
I have not checked the arithmetic, but the procedure looks correct.


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