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Disturbed sleep

Marie puts aside the newspaper aghastly. She has read an article about climate change and it seems like the mean temperatures rise worldwide.

Now Marie is worrying about her sleep. For the global warming causes the melting of the polar caps and then the water will spread around the globe. But Marie thinks that the changed mass distribution again causes the shortening of day and night.
Does Marie really have to worry about her nights being shorter?


Helpful hints
The pirouette effect
What do pirouettes and the earth have in common?
Endless rotations...
That will make you feel dizzy.
About day and night
Does the rotation of the earth have an effect on the length of day and night?
We are rotating permanently...
Lilly and Fred think over together.
That may help...
In the toolbox you can find important physical basics and valuable facts.
"I've got it!"...
...and I would like to answer the question.