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# Kitty Meow Meow
I need your huge brain:

I'm trying to help the partner with some calculations at work, but we've got ourselves all confused and argumentative.

Basically we are trying to work out the wieght of something given only the dimensions.

It's glass, solid glass.
the formula partner was using was:
At the moment the length * height * number of sheets of glass = square metres. It is then divided by a preset amount based on the substance (width) of the glass to give us tonnes.

which i make as

(L * H * n) / W = tonnes

I was saying it should be
(L * H * W) * n = Volume

but i can't finish the step to turn that into wieght. I think i need to know the denisty.Please can you (or anyone) tell me the formula to convert volume into wieght.

(yes i've tried using google)
(, Tue 2 Sep 2003, 4:13, archived)
# yes, you need the density
and you're right about the volume

what sort of glass is it? I have resources.
(, Tue 2 Sep 2003, 4:15, archived)
# I can give you the density
for pure SiO2 in a few minutes, but most glass has impurities in it.

heavy ones.

Like calcium
(, Tue 2 Sep 2003, 4:16, archived)
# i hate
calcium

and that's my contribution to this conversation over with
(, Tue 2 Sep 2003, 4:17, archived)
# wot?
even kraft cheese slices?
(, Tue 2 Sep 2003, 4:18, archived)
# that has made me crave
for processed foods

i'm going to the fridge - i'll be back with processed cheese slices and beer
(, Tue 2 Sep 2003, 4:19, archived)
# no wonder you feel ill....
(, Tue 2 Sep 2003, 4:20, archived)
# try here
www.memsnet.org/material/silicondioxidesio2bulk/

we use memsnet a lot...it isn't the best, but it's easy to find
(, Tue 2 Sep 2003, 4:18, archived)
# thanks you!
hugs to you

(, Tue 2 Sep 2003, 4:20, archived)
# they use a range of different glass
including low iron for solar panels.
I dodn't think it matters given the amounts they are caluclating.
The only one i knoe they fudge the fuigures with) is the glass with the wire in it which wieghs a lot more.

an average for a nice pure glass will be lovley thanks (and do i dived or mulply the volume by the denisity?)
(, Tue 2 Sep 2003, 4:20, archived)
# well
density is kg/m^3 so you multiply times the density to cancel the m^3. just make sure your units are right.

2200 kg/m^3 seems to be about right
(, Tue 2 Sep 2003, 4:21, archived)
# here maybe:
(, Tue 2 Sep 2003, 4:16, archived)
# hmm
maybe, but you need the density to convert to weight.
(, Tue 2 Sep 2003, 4:17, archived)
# lenght*height*weight *number of sheets * density
(, Tue 2 Sep 2003, 4:17, archived)
# have a fight over it.
whoever wins is right.
(, Tue 2 Sep 2003, 4:17, archived)
# extra points
for facial damage with the glass.
(, Tue 2 Sep 2003, 4:19, archived)
# even more for glass "insertion"
(, Tue 2 Sep 2003, 4:20, archived)
#
glasscock? :(
(, Tue 2 Sep 2003, 4:21, archived)
# ow....
(, Tue 2 Sep 2003, 4:24, archived)
# whoever wins
gets the fiver
(, Tue 2 Sep 2003, 4:19, archived)
# oo im up for that!
(, Tue 2 Sep 2003, 4:19, archived)
#
We need to know
A) what dimensions you have already
B) what dimension you're trying to find

This may help, not sure what you're after.
Pulling numbers at random for the purposes of calculation.

Volume = Length x Height x Depth
Density = Weight / Volume

So if for example your sheets of glass are 2m x 3m x 1cm, you're looking at 2x3x.01 = 0.06 cubic metres of glass, per sheet.

If each sheet weight 50kg then
50kg = 0.06 m3
50/6x100 = 833kg per cubic metre
(, Tue 2 Sep 2003, 4:23, archived)