Pyrex has a temperature coefficient of volume expansion what is the linear expansion?

Question

Pyrex has a temperature coefficient of volume expansion of 9 x 10 -6/ C. What do you expect the linear expansion coefficient to be (in ----/C)

A) 27 x 10 (-18)

B) 27 x 10 (-6)

C) 9 x 10 (-6)

D) 3 x 10 (-6)

Answer 1

D) 3 x 10 (-6)

Explanation:

For isotropic materials, the volumetric thermal expansion coefficient is very closely approximated as three times the linear coefficient.

So you can expect, that coefficient of linear expansion is about one third of the coefficient ot volume expansion.