WAEC - Physics (2000 - No. 17)
The cubic expansivity of mercury is 1.8 x 10-4K-1 and the linear expansivity of glass 8.0 x 10-6K-1, calculate the apparent expansivity of mercury in a glass container
1.00 x 10-4K-1
1.56 x 10-4K-1
1.72 x 10-4K-1
2.04 x 10-4K-1
Explicació
γ\(_r\) = γ + γ\(_{app}\)
1.8 x 10\(^{-4}\) = (3 x 8.0 x 10\(^{-6}\)) + γ\(_{app}\)
γ\(_{app}\) = 1.8 x 10\(^{-4}\) - 2.4 x 10\(^{-5}\)
= 1.56 x 10\(^{-4}\)K\(^{-1}\)