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anonymous

  • 4 years ago

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.

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  1. Mertsj
    • 4 years ago
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    pi (3.2/2)^2 * 500 - pi (2.4/2)^2 *500 = 1759.29cm^3

  2. perl
    • 4 years ago
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    now convert to ft^3 , and then multiply by density to get mass

  3. Mertsj
    • 4 years ago
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    \[1759.29 cm^3\times\frac{1 IN^3}{2.54^3 cm^3}\times\frac{1 ft^3}{12^3 IN^3}\times\frac{559 lbs}{1 ft^3}\]

  4. Mertsj
    • 4 years ago
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    34.73 lbs

  5. perl
    • 4 years ago
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    looks good :)

  6. perl
    • 4 years ago
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    of course the person who pposted it didnt bother waiting for a solution,

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