エレン・デジェネレスのインスタグラム(ellendegeneres) - 8月13日 07時41分

@bachelorabc’s @ColtonUnderwood & @CassieRandolph tackle the internet’s biggest questions in my debate club! #TheBachelor

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stacyadejesus I looked it up to. Many different answers but I also found this one!!! Answer To How Many Holes Does A Straw Have? The mathematically correct answer is 1 hole. A straw is topologically the product of a circle, which has 1 hole, and an interval, which has 0 holes. So the straw has 1 hole. Formally, a straw is topologically equivalent to S1 × [0, L], where S1 is the unit circle and L is the length of the straw. This is a summarized form of the explanation in Drinking Straws: How Many Holes? by Kevin Knudson, a professor of mathematics at the University of Florida. Intuitively, we can agree a circle has 1 hole–the simple closed curve contains a 2-dimensional hole inside of it. Adding depth does not increase the number of holes. So a straw could theoretically be stretched and continuously deformed into other shapes with 1 hole–like a filled donut (torus), or a coffee mug.

elarnaaote I tend to agree that a straw has two holes. By default a hole is an access point to something and so the straw has 2 access points and hence 2 holes. The hole in the wall is one as it provides one access point. If you find a cave and enter it, walk in and get to another opening that gets you out of the cave, does the cave have 2 openings or one? If you say one, then a cave with an entry but no other way out would have zero openings?

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prestonspottery It really depends on your usage of the word "hole". Topologically a straw is of genus 1, which would generally mean it has one hole, but due to the shape of a straw it has a distinct inside and outside, so you could argue that each end is an opening connecting the inside and outside, making them both holes.

name_drop_label_stop A straw has TWO holes: Start with a plastic tube completely sealed off- now add ONE hole. Can you use it as a straw yet? No? Okay, add the 2ND hole then! And done 🙂 two holes needed in a tube of plastic to create what we call a “straw”

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