Does angular momentum change for a spinning half-filled water bottle?

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Prashan Shan
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Will the angular momentum of a half filled waterbottle increase? or decrease? or remain the same?
 
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As compared to what?
 
nasu said:
As compared to what?
when compared to the angular momentum of the bottle at instant when it started spinning.
 
Spinning around what axis?
 
nasu said:
Spinning around what axis?
about its center.
 
The center is not an axis. The axis is a line. It may go through the center. But there are many lines going through a point.
Look, you need all the details of a question before you can even think about an answer. You cannot expect people to read your mind and figure out by themselves what you want to ask.