What was the solution to the current through wire problem?

[FlipStyle1308]

Problem solved, never mind! Thank you for your help though, Astronuc!

 

[Astronuc]

Is this correct ?

00.44 mm

The resistance R = 19.74 ohms for V = 15 V and I = 0.76 A is correct, and the resistivity for copper is correct.
http://hyperphysics.phy-astr.gsu.edu/hbase/Tables/rstiv.html#c1

R = \rho(L/A), is correct.
http://hyperphysics.phy-astr.gsu.edu/hbase/electric/resis.html

It seems the math is also correct. Check to make sure the diameter is correct. 0.44 mm dia. => 0.22 mm rad. = 0.00022 m.

 

[FlipStyle1308]

Problem solved. The instructor had to edit something since it used another value for copper.