Question

The active element of a certain laser is made of a glass rod 29.0 cm long and 1.20 cm in diameter. Assume the average coefficient of linear expansion of the glass is equal to 9.00 10-6 (°C)-1. The temperature of the rod increases by 70.0°C.
(a) What is the increase in its length?
(b) What is the increase in its diameter?
(c) What is the increase in its volume?

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