Question

The pendulum of a clock is made of ___________. ​

Answer 1

Answer:

INVAR

INVAR is an alloy of iron and nickel,and it has a negligible small co- efficient of linear expansion. the pendulum of a clock is made of INVAR so that neither the clock loses time in summer due to expansion ,nor it gains time in winter due to contraction.

Answer 2

Answer:

invar is used to make pendulam of a clock