Consider a rectangular sheet of solid material of length ℓ = 9 cm and width d = 4 cm . The coefficient of linear expansion is α = 3.1 × 1 0 − 5 K − 1 at room temperature and one atmospheric pressure.

Question

Consider a rectangular sheet of solid material of length $ℓ = 9 cm$ and width $d = 4 cm$ . The coefficient of linear expansion is $α = 3.1 \times 1 0^{- 5} K^{- 1}$ at room temperature and one atmospheric pressure. The mass of sheet $m = 0.1 kg$ and the specific heat capacity $C_{v} = 900 J kg^{- 1} K^{- 1}$ . If the amount of heat supplied to the material is $8.1 \times 1 0^{2} J$ then change in area of the rectangular sheet is :-

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Answer:

A

Solution:

$Δ Q = ms Δ T 8.1 \times 1 0^{2} = 0.1 \times 900 \times Δ T Δ A = A_{0} 2 α Δ T = 2.0 \times 1 0^{- 6} m^{2}$

TestHub · Accepted Answer

​ Δ Q = ms Δ T 8.1 × 1 0 2 = 0.1 × 900 × Δ T Δ A = A 0 ​ 2 α Δ T = 2.0 × 1 0 − 6 m 2 ​

Physics - Heat & Thermo Question with Solution | TestHub

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