- #1
Burntresistor
- 6
- 0
Homework Statement
a 15ft length wire with a cross sectional area of 127 c mils has a resistivities of 8.74 ohms at 20 C. What material is wire made of. Any help would be appreciated. (pi/4*10^-6) was given by the book. Whats odd is when I enter pi/4*10^6 instead for wolfram I'm getting the right answer. I would just like to know if I'm wrong or the book is,and if I am wrong how to go about it.
Homework Equations
p=AR/L ([127(pi/4*10^-6)IN^2](8.74ohm))/15ft*1ft/12inch*.0254/1inch
The Attempt at a Solution
wolfram isn't giving me the right answer. I'm given this problem from a schaum workbook. answer is 12.3*10^-8