A thin aluminum plate has a surface area of 1500m at 20oC. What will be its surf...
Question
A thin aluminum plate has a surface area of 1500m at 20oC. What will be its surface area when it is cooled to -20oC? (Take the linear expansivity of aluminum to be 2.5 x 10-5k-1).Options
A) 1.503m2
B) 1.500m2
C) 1.498m2
D) 1.497m2
E) 1.490m2
Related Lesson: Parallel Plate Capacitor | Electric Potential and Electric Field
The correct answer is C.
Explanation:
\(\beta\) = A2 - A1
2 X 10-5 x 2.5 = \(\frac{A_2 \times 1.5}{1.5 \times (-20 -20)}\)
A2 = 1.498m2
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\(\beta\) = A2 - A1
2 X 10-5 x 2.5 = \(\frac{A_2 \times 1.5}{1.5 \times (-20 -20)}\)
A2 = 1.498m2