How many pairs of electrons are shared between two nitrogen atoms in the formula for hydrazine
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Answer:
Length of copper wire is 5,22m and the diameter of copper wire is 2,14x10⁻³m.
Explanation:
The resistance of a wire is determined by:
R = ρL/A
Where R is resistance (25x10⁻³Ω); ρ is resistivity (1,72x10⁻⁸Ωm); R is length and A is cross sectional area.
Replacing you will obtain:
1,45x10⁶ m⁻¹ = L/A <em>(1)</em>
$1 of copper are:
$1× = 0,37 lb. In kg:
0,37lb× = 0,169 kg of copper.
As density of copper is 8960 kg/m³. The volume of this amount of copper is:
0,169kg× = 1,88x10⁻⁵ m³
The volume of a wire is L×A. Thus:
1,88x10⁻⁵ m³ = L×A<em> (2)</em>
Replacing (1) in (2)
1,88x10⁻⁵ m³ = 1,45x10⁶ m⁻¹A²
A = 3,6x10⁻⁶ m²
Thus, L = 5,22 m
Thus, <em>length of copper wire is 5,22 m</em>
As area = 3,6x10⁻⁶ m² = Where d is diameter.
The <em>diameter of copper wire is 2,14x10⁻³m</em>
I hope it helps!