# Question #380f3

##### 1 Answer

Jun 27, 2017

Fractional change = 1.00005787 = [ 86405/86400 ]^2

#### Explanation:

86400 sec/day

Period of Pendulum T = 2pi Sqrt(L/g)

86405/86400 = 2pi Sqrt(L[now]/g) / 2pi Sqrt(L[now]/g)

2pi 's cancel

Square both sides

Right side becomes L[now] / L