anonymous
  • anonymous
The density of copper is 559 lb_m/ft^3. What is the mass of the copper pipe in pounds? A copper pipe, used for plumbing from the water main to a house, is 5 meters long and has a circular cross-section 3.2 cm in diameter. There is a 2.4 cm diameter hole in the center of the cross-section for the entire length of the rod.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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Mertsj
  • Mertsj
I solved this for you yesterday. Why are you posting it again?
anonymous
  • anonymous
it wasnt right
Mertsj
  • Mertsj
What is the answer?

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More answers

anonymous
  • anonymous
you gave me 34.7, my software rejected it
Mertsj
  • Mertsj
And why do you have that underscore after the lb_ ?
anonymous
  • anonymous
|dw:1328838221094:dw|
Mertsj
  • Mertsj
lb_m/ft^3 What does that mean?
anonymous
  • anonymous
|dw:1328838314615:dw|
Mertsj
  • Mertsj
|dw:1328838358865:dw|
anonymous
  • anonymous
pounds in mass
Mertsj
  • Mertsj
Is that different from pounds?
anonymous
  • anonymous
yeah i think. im not quite sure what the conversion is but i think its different
Mertsj
  • Mertsj
Maybe I'll google it.
anonymous
  • anonymous
i think its something like 1lb_m = 2.2 kg/m^3
Mertsj
  • Mertsj
According to Wikipedia it's the same thing.
Mertsj
  • Mertsj
I'll work the problem again and see if I get a different answer.
anonymous
  • anonymous
ok thank you
Mertsj
  • Mertsj
This time I got .983 pounds How many decimal places do you need?
Mertsj
  • Mertsj
How many times can you put it into your software? I am going to do it again to double check.
anonymous
  • anonymous
unlimited
anonymous
  • anonymous
until i get it right
Mertsj
  • Mertsj
I got the same thing again and I did it a different way. .983444164 lbs
Mertsj
  • Mertsj
Are you going to put it in and see if its right? I would like to know.
anonymous
  • anonymous
i tried. it also rejected that answer
Mertsj
  • Mertsj
How many decimal places did you enter? Is there instructions for that?
anonymous
  • anonymous
i entered all decimals
Mertsj
  • Mertsj
Maybe you should try 1 pound since they gave the density to the nearest pound. Or maybe try two significant digits since that's the number of significant digits in the diameter measurement.
Mertsj
  • Mertsj
Or maybe three significant digits since the density has 3 significant digits.
anonymous
  • anonymous
yeah it rejected both again
anonymous
  • anonymous
guess i will have to figure out something else
Mertsj
  • Mertsj
What class is this? maybe it's a calculus problem or something.
anonymous
  • anonymous
its calc
Mertsj
  • Mertsj
Oh gees. The density is given per cubic foot. I have to recalculate.
anonymous
  • anonymous
ok
anonymous
  • anonymous
are you there?
Mertsj
  • Mertsj
yes
Mertsj
  • Mertsj
I found an online volume calculator for pipe. It allows me to put in the diameter in cm the length in m and get the volume in cubic feet. So I put them in, subtracted and got .06213 cubic feet and it came out to 34.73 lbs.
Mertsj
  • Mertsj
So maybe try 35 pounds or 34.73
Mertsj
  • Mertsj
Also I found online that the density of copper is 556 pounds per cubic ft. There isn't a typo in the problem is there?
anonymous
  • anonymous
guess it wanted me to round the whole time, it took 35..wow
anonymous
  • anonymous
can't believe it was that picky
Mertsj
  • Mertsj
Thank goodness. This was driving me crazy.
anonymous
  • anonymous
thanks for the help very much
Mertsj
  • Mertsj
You're welcome. Good luck in all your studies.
anonymous
  • anonymous
thank you. you too
Mertsj
  • Mertsj
ty
anonymous
  • anonymous
take care
Mertsj
  • Mertsj
you too.

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