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Science-Related Homework Help Physics Topic started by: RioNii on Mar 28, 2022



Title: An aluminum wire has a length of 27.0 m and a resistance of 2.90 n at 20.00C. As
Post by: RioNii on Mar 28, 2022
(https://biology-forums.com/gallery/44/1084486_28_03_22_4_28_03.png) (https://biology-forums.com/index.php?action=gallery;sa=view&id=44826)

An aluminum wire has a length of 27.0 m and a resistance of 2.90 n at 20.00C. Assuming a circular cross-section, what is the wire's diameter (in mm)? The resistivity of aluminum at 20.OOC is 2.82 x 10-8 Q m.


Title: Re: An aluminum wire has a length of 27.0 m and a resistance of 2.90 n at 20.00C. As
Post by: bio_man on Mar 28, 2022
(https://biology-forums.com/gallery/44/6_28_03_22_9_39_53.png) (https://biology-forums.com/index.php?action=gallery;sa=view&id=44831)


Title: Re: An aluminum wire has a length of 27.0 m and a resistance of 2.90 n at 20.00C. As
Post by: RioNii on Mar 28, 2022
Sir the answer was wrong :(


Title: Re: An aluminum wire has a length of 27.0 m and a resistance of 2.90 n at 20.00C. As
Post by: bio_man on Mar 28, 2022
Yes, darn, I used the wrong resistivity number. Please try 0.578