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Simple Math question thats bsing me

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Old 01-29-2008, 06:47 PM
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Default Simple Math question thats bsing me

Tungsten has a density of 1.94 10^4 kg/m^3. What is the density of tungsten in units of g/cm^3?


In regular notation thats 19400 kg/m^3

I need it in g/cm^3

First: I converted it to kg/cm^3 which is 194 kg/cm^3.

Second now I convert it to g/cm^3 which the answer should be 194000 g/cm^3.

I keep getting told its wrong. Wtf its right.

There are 1000 grams in 1 kilogram.
There are 100 centimeters in 1 meter.

Someone do it and tell me what I already know which it is 194000 g/cm^3.
 
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Old 01-29-2008, 06:51 PM
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Default RE: Simple Math question thats bsing me

[sm=dontgetit.gif]

Nauree, you let me know when you get it, lol.
 
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Old 01-29-2008, 06:53 PM
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Default RE: Simple Math question thats bsing me

I've got it. Its the damn computer thats wrong.
 
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Old 01-29-2008, 06:56 PM
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Default RE: Simple Math question thats bsing me

1000g/100cm^3 = kg/m^3

1000/100 = 10

So all I would need to do is 19400 * 10 = 194000

I proved another way I am correct.
 
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Old 01-29-2008, 07:04 PM
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Default RE: Simple Math question thats bsing me

All your math are belong to us.

 
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Old 01-29-2008, 07:09 PM
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Old 01-29-2008, 07:55 PM
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Default RE: Simple Math question thats bsing me

Ima have to lay the pwnage on my professor tomorrow.
 
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Old 01-29-2008, 08:18 PM
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Default RE: Simple Math question thats bsing me

When dealing with a computer it only handles up to so much accuracy when dealing with floating point numbers. So, sometimes when calculating, zero may not actually equal zero. Don't know if that explains your problem with why your calculations were wrong on the computer. But it just makes me feel better to pretend that I know what I'm talking about.
 
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Old 01-29-2008, 08:40 PM
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Default RE: Simple Math question thats bsing me

1 m^3 = 1m x 1m x1m = 100cm x 100cm x 100cm = 1,000,000 cm^3 not 1m^3 = 100cm^3

imagine a box that is 1 meter tall, wide and long, so that is 1 cubic meter.

now that is alot bigger then a box is 1 cm tall, 10 cm long, and 10 wide, that box would be 100 cubic centimeters.

1 cm^3 = 1 cc = 1 cubic centimeter = 1 mL


thus, your 19400 kg/m^3 equals (19400,000g)/(1,000,000cc) or 19.4g/cc

19.4g/cm^3 is your answer.

 
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Old 01-29-2008, 08:40 PM
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Default RE: Simple Math question thats bsing me

[sm=dontgetit.gif] WTF?
 


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