Answer:
1.41 × 10⁻⁵Ωm
Explanation:
Resistance of wire is defined by the formula
R = ρL / A
RA / L = ρ
using ohm's law
V = IR
R at 20°C = V / I = 14 / 18.2 = 0.769 ohms
RA / L = ρ
diameter = 0.55 cm = 0.55 / 100 in m = 0.0055 m
A = πr² = 3.142 × (0.0055 m/ 2 )² = 0.0000238 m²
ρ = ( 0.769 ohms × 0.0000238 m²) / 1.30 m = 1.41 × 10⁻⁵Ωm
In scientific notation, if the exponent of 10 is positive, the number is very very large. In the metric system, very large numbers are expressed in megameters (Mm) or gigameters (Gm). Gigameters is equal to 10⁹ meters. So, in SI prefix, that would be equal to 150 Gm. In kilometers, that would be equal to:
1.5×10¹¹ m * (1 km/1000 m) = 1.5×10⁸ km
True usally quizlet teachers get there work from there
A textbook but if there none to good use try google