Suppose you have a pipe with circumference 8 cm and length 20 cm and that 8 turns of a wire are wrapped around the pipe. What is the lenght of the wire? Thanks in advance...
2007-02-10 02:17:38 · 13 answers · asked by unpredictedmystery 3 in Science & Mathematics ➔ Mathematics
ok....i tried it but 64 is wrong....the answer says its 67.05...altho i have no idea how thats possible...any1 kno?
2007-02-10 02:29:22 · update #1
So the real question is... How could 67.05 cm be the right answer? Maybe we need to account for the thickness of the wire. If the wire has a width of 0.121 cm (radius = 0.0606 cm) then 8 turns will require 67.05 cm of wire.
2007-02-10 02:47:35 · answer #1 · answered by Bill C 4 · 0⤊ 0⤋
you know the circumference is 8 cm. If the wire wraps around it 8 times then that is 8 circumferences. 8x8=64 cm.
2007-02-10 02:22:56 · answer #2 · answered by ignoramus 7 · 0⤊ 0⤋
From the info you give, it seems that the info about the length of the pipe does not matter.
If you already know that the circumfrence is 8 and that there are 8 turns, then just multiply 8 x 8.
2007-02-10 02:21:43 · answer #3 · answered by JiveSly 4 · 0⤊ 0⤋
62.57 cm
we have to do a little assumption that it's like 8 circles of wire around the pipe and have to ignore the thickness perpendicular to the pipes tangents.
first find the diameter of the wire by dividing the pipe length by 8 and you get the answer as 2.5
and then use C= phy.d equation to find the circumference and then and multipy it by 8 (amount of rounds) to get the answer.
2007-02-10 02:38:02 · answer #4 · answered by Anonymous · 0⤊ 1⤋
8 cumfrences or 64 cm
2007-02-10 02:23:23 · answer #5 · answered by walter_b_marvin 5 · 0⤊ 0⤋
8(no:of turns)*8(circumference)=64 cm
2007-02-10 02:25:16 · answer #6 · answered by mahesh m 1 · 0⤊ 0⤋
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2016-11-03 01:47:29 · answer #7 · answered by ? 4 · 0⤊ 0⤋
ok!
the wire has also circumference and lenth!
ok?
let s name them ''wc'' and ''wl''!
(please don t comfuse ''wc'' with the toilet!)
.......
8 times the dimeter of the wire must be equal with 20cm!
20/8=2,5cm!=> r=1,25cm
2πR=8cm
=>R=4/π cm =1,27cm
but the wire do a cicle with R'=R+r=1,25+1,27=2,52cm
so the ''wl''=8*2*π*2,52=127cm!
ok, thats an idea....check it....
it may be not corect....
have a nice day!
2007-02-10 02:44:05 · answer #8 · answered by Anonymous · 0⤊ 0⤋
Depends on whether the turns are regular with uniform spacing or irregular
2007-02-10 02:29:32 · answer #9 · answered by Mau 3 · 1⤊ 0⤋
it goes around the pipe 8 times reaching from end to end then
8*8cm + 20cm= 84cm
If it does not go end to end then the answer is 64cm
2007-02-10 02:23:46 · answer #10 · answered by shadouse 6 · 0⤊ 1⤋