Based on the value of the Young's modulus, the strand of the metal is made of copper.
<h3>
Young's modulus of the metal</h3>
The Young's modulus of the metal is calculated as follows;
E = stress/strain
<h3>Stress of the metal</h3>
The stress of the metal is calculated as follows;
σ = F/A = mg/A
where;
A is area of the metal
A = πr²
A = π( 2 x 10⁻³)²
A = 1.257 x 10⁻⁵ m²
σ = (70.5 x 9.8) / (1.257 x 10⁻⁵)
σ = 5.5 x 10⁷ N/m²
<h3>Strain of the metal</h3>
The strain is calculated as follows;
strain = x/L
where;
x is extension
L is original length
strain = (1 x 10⁻³ m) / 2 m
strain = 5 x 10⁻⁴
<h3>Young's modulus of the metal</h3>
E = stress/strain
E = (5.5 x 10⁷ ) / (5 x 10⁻⁴)
E = 1.1 x 10¹¹ N/m²
E = 110 Gpa
The Young's modulus of copper metal is 110 Gpa
Thus, based on the value of the Young's modulus, the strand of the metal is made of copper.
Learn more about Young's modulus here: brainly.com/question/6864866
