# Question #6c7ad

##### 1 Answer

#### Explanation:

The linear thermal expansion of an object can be expressed as

#dl = L_0 α (t_f - t_i)#

where#dl# is change in length,#L_0# is initial length,#α# is Coefficient of linear expansion of the material of the object,#t_f and t_i# are initial and final temperatures respectively.

Inserting given values and taking

New length of pendulum's wire

Time period

#T=2pisqrt(l/g)#

Where#l# is length of pendulum and#g# is acceleration due to gravity and#=9.81ms^-2#