energy extracted out of liquids an atoms are left to come closer arrange themselves shorter distance and then they solidify
A negative ion is a atom that has an extra electron, but the same # of protons
We have that the spring constant is mathematically given as

Generally, the equation for angular velocity is mathematically given by

Where
k=spring constant
And

Therefore

Hence giving spring constant k

Generally
Mass of earth 
Period for on complete resolution of Earth around the Sun


Therefore


In conclusion
The effective spring constant of this simple harmonic motion is

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C. increased stirring i think