JAMB - Physics (2012 - No. 15)
Two metals P and Q are heated through the same temperature difference. If the ratio of the linear expansivities of P to Q is 2:3 and the ratio of their
length is 3: 4 respectively, the ratio of the increase in lengths of P to Q is
length is 3: 4 respectively, the ratio of the increase in lengths of P to Q is
1:2
2:1
8:9
9:8
Giải thích
P: \(\frac{\alpha h \theta}{\alpha h \theta}\)
\(\frac{2 \times 3 \times \theta}{3 \times 4 \times \theta}\)
\(\frac{1}{2}\)
\(\frac{2 \times 3 \times \theta}{3 \times 4 \times \theta}\)
\(\frac{1}{2}\)