Consider a copper wire with a diameter of 0.450 mm. if you want to cut a piece of the wire so it has a resistance of 3.25 ω, how long should your piece of wire be? (resistivity of copper: 1.68x 108 ω m) a. 0.343 m b. 9.79 m 13. c. 2.91 m d. 123 m e. 30.1 m

30.7m

Explanation:

You can use the following equation:

ρ = R *

Where ρ is the resistivity, R is the resistance, S is the Cross-sectional Area and l is the length of the wire.

We issolate l in the equation and solve with the data we have:

l = R * = 3.25 Ω *

l =  30.7m

true tan speed = ang vel x radius