Determine the length of a copper wire that has a resistance of 0.172 ? and cross-sectional area of 7.85 × 10-5 m2. the resistivity of copper is 1.72 × 10-8 ? ·m.

Length of copper wire, l = 785 meters

Explanation:

Given that,

Resistance of the copper wire, R = 0.172 ohms

Area of cross section,

Resistivity of copper,

The resistance of a wire is given by :

l = 785 meters

So, the length of the copper wire is 785 meters. Hence, this is the required solution.

we're given that v₀ = 0 and a = 5.4 m/s². therefore, since v = at + v₀ for constant acceleration the equation for velocity is

after 28s,

m/s

which i would round to 150 m/s as my final answer