Question

If the coefficient of cubical expansion is x times the coefficient of superficial expansion, then the value of x is:

A. 2
B. 3
C. 1
D. 4

Answer 1

The coefficient of cubical expansion (α) is defined as the fractional change in volume per degree rise in temperature, and the coefficient of superficial expansion (β) is the fractional change in area per degree rise in temperature.

The relationship between the coefficients of cubical expansion and superficial expansion is given by:

α = 3β

Therefore, the value of x is 3.

So, the correct answer is:
B. 3