A blacksmith heated a metal whose cubic expansivity is 6.3 x 10-6K-1. The areal expansivity is
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Correct Answer: Option C
Explanation:
If the lineal expansivity = ∠
=> area expansivity β= 2∠.
And cubic expansivity δ = 3∠.
=> 6.3 x 10-6 = 3∠
− ∠ =
− Area = 2∠ = 2 x 2.1x10-6
= 4.2 x 10-6K-1
If the lineal expansivity = ∠
=> area expansivity β= 2∠.
And cubic expansivity δ = 3∠.
=> 6.3 x 10-6 = 3∠
− ∠ =
| __3 |
− Area = 2∠ = 2 x 2.1x10-6
= 4.2 x 10-6K-1