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Classic topology question. Absolutely one hole; it goes all the way through.
Of course, connotatively, two is a fine assessment, but not in topology.
How many holes does a donut have? Now just try to image the real difference between a straw and a donut. Is there one, aside from deliciousness?
How many holes does a donut have?
Now make the donut higher. A lot higher. Now you have a donut-tunnel. Now make the walls thinner. Now shrink it. Now you have a straw.
One hole.
By the logic of most of the comments in here, does this mean most people are wrong when they say they are digging a hole???
pores are holes
Omg... What are holes? My brain is melting.
If the letter O has one hole than a straw is just an extended 3d O shape and therefore would have the same number of holes
A hole.
A straw has a hole. 😂
One hole. Both "holes" in the straw lead to one another, ergo they're the same hole, ergo a straw only has one long hole
Zero holes, one channel.
If we define 'hole' as vacancy (so the absence of meterial where it is supposed to be), then 0 as a straw is sopposed to be not copletely filled.
By the logic of most of the comments in here, does this mean most people are wrong when they say they are digging a hole???
A straw is geometrically the same as a circular piece of paper with a z depth of zero and a hole in the middle. Because the z depth is zero there is only one hole. As you add thickness the one hole remains. Therefore, a straw has one hole.
Mathematically It's one. Think of a disk, like a CD, does it have one hole or two? One, right? Now imagine you can make it thicker, I.e. increase the height, and then reduce the outer radius... Making it progressively more straw-like. At what point does it stop having 1 hole and begin to have 2?
Topologically they're the same shape.
I'm sure Matt Parker has a video on this topic in YouTube. Here
The specific field is topology fyi
It's just one long hole.
