Question

Coefficient of linear expansion of brass is 1.962 x 10−5 /℃, then its coefficient of areal expansion is----​

Answer 1

Explanation:

Coefficient of linear expansion = α = 2×10

−5

C

−1

Coefficient of superficial expansion = β = 2α

∴β=2×(2×10

−5

)

=4×10

−5

Coefficient of cubical expansion =

γ=3α

=3×(2×10

−5

)

=6×10

−5

Let the coefficient of cubical expansion and coeficient of superficial expansion be y and x respectively.

∴(y−x)×10

5

=(6×10

−5

−4×10

−5

)×10

5

=(6−4)×10

−5

×10

5

=2

your answer is in attachment