# physics

A hole in an aluminum plate has a diameter of 1.465 cm at 22.80° C.
(a) What is the diameter of the hole at 199.0° C (to four significant digits)?

(b) At what temperature is the diameter of the hole equal to 1.463 cm (to three significant digits)?

1. 👍 0
2. 👎 0
3. 👁 214
1. the diameter expands by ∆L=L0.α. ∆T

1. 👍 0
2. 👎 0

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