Question

if a substance is heated or cooled the linear expansions occurs along the axis of ..............

a) X or -X

b) Y or -Y

c) both (a) and (b)

d) (a) or (b)
​

Answer 1

ANSWER:

The correct option is c) both (a) and (b).

EXPLANATION:

     Whenever a substance is heated or cooled, the corresponding expansion or contraction occurs in a way which can be called photographic enlargement. So, if the substance is heated then expansion occurs and the substance's dimensions increase in both x and y axis directions.

   And when the substance is cooled, then contraction occurs and the substance's dimensions decrease in both x and y axis directions.