

Subject:
math conversion
Category: Science > Math Asked by: steveairga List Price: $5.00 
Posted:
16 Dec 2003 06:50 PST
Expires: 15 Jan 2004 06:50 PST Question ID: 287679 
I suppose that this is really two questions, but I'm presenting them as one; What is the weight, in U.S. lbs., of a one inch length of 3/4 inch diameter rod of lead (11.35 gm/cc)? What is the weight, in U.S lbs., of a one inch length of 3/4 inch diameter rod of tungsten (19.3 gm/cc) ? 

Subject:
Re: math conversion
Answered By: endoga on 16 Dec 2003 07:34 PST 
Hi, Thank you for your question. The following are conversions of the units we will use: 1 inch = 2.54 cm 3/4 inch = 1.905 cm 1 lbs = 453.5924 g 1) For the first rod we have: Volume of the rod = 1.905 x pi x 2.54 = 15.201 cc diameter length Weight of the rod = 15.201 x 11.35 = 172.53 g volume density Weight of the rod in lbs = 172.53/453.59 = 0.38 lbs 2) For the second rod we have: Volume of the rod = 15.201 cc Weight of the rod = 15.201 x 19.3 = 292.38 g Weight of the rod in lbs = 292.38/453.59 = 0.65 lbs I hope this answers your question. If anything is unclear or you require any clarifications, please do not hesitate to ask. Thanks. endo Search strategy weight converter ://www.google.com/search?hl=en&lr=&ie=ISO88591&safe=off&q=weight+converter Interactive Units Converter http://www.convertme.com/en/convert/weight  


Subject:
Re: math conversion
From: racecarga on 16 Dec 2003 10:28 PST 
This answer needs some fixin', endoga. As I know you know, the area of a cylinder is not pi*diameter*length. The correct volume is 7.240 cubic centimeters. 
Subject:
Re: math conversion
From: racecarga on 16 Dec 2003 10:34 PST 
Ooops, for 'area of a cylinder', read 'volume of a cylinder'... 'long as I'm adding a second comment, the correct weights are .181 and .308 lb. 
Subject:
Re: math conversion
From: steveairga on 16 Dec 2003 18:38 PST 
Thanks, Steve 
Subject:
Re: math conversion
From: kikga on 17 Dec 2003 04:14 PST 
Ain;t weight = mass * gravity ? 
Subject:
Re: math conversion
From: vince6567ga on 06 Jan 2004 14:02 PST 
A good website for conversion of various units is: http://www.onlineconversion.com/ It converts most anything to anything. 
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