Does a straw have one or two holes? So, according to Riemann, because a straw can be cut only once — from end to end — it has exactly one hole.
Likewise, Does a hole have a bottom?
The O.E.D. files this usage under the second sense of “hole,” defined as “a perforation” and “an aperture passing through anything.” The first sense of “hole” (“a hollow place, cavity, excavation”) seems to imply something with a bottom; its earliest attestation comes from a land grant charter written in 946.
Thereof, Does a tunnel have a hole? is that hole is a hollow spot in a surface while tunnel is an underground or underwater passage.
How many holes does a donut have?
How many holes does a donut have? That’s pretty easy: one. What about a straw? Two (one at each end) or just one? (Isn’t a straw just an elongated donut?)
How many holes does a sock have?
T: Socks have one hole!
Is a straw a tube?
“An ideal straw has no holes. It is a pipe. If it had a hole, it would leak.” “‘Technically’ a straw has one hole but ‘technically’ it does not.
How many holes do pants have?
Pants as topological surfaces
A pair of pants is any surface that is homeomorphic to a sphere with three holes, which formally is the result of removing from the sphere three open disks with pairwise disjoint closures. Thus a pair of pants is a compact surface of genus zero with three boundary components.
Can a hole have two openings?
The two ends of the pipe are part of the same system, but are two unique and distinct holes. Team Two Holes argues a straw is no different.
Can a hole have more than one opening?
“Two holes, one single column. Reasoning: If you’re looking at the opening of a pipe, a very long pipe with the other end miles away, you are looking at a hole. The opening at the other end is part of the same system, but it’s a distinct and unique hole.
Is a drinking straw a cylinder?
I guess I understand the “two holes” camp; after all, a straw is a cylinder through which liquid flows from one end to the other and that seems like two holes. … Even the bendy straw in the photo above is of this form, as is one of those silly straws that kids like to use for their chocolate milk.
How many holes does a coffee mug have?
The hole truth of topology
A bowl has no holes (genus 0), a coffee cup has one (through the handle – making it genus 1), a pair of spectacles (without the pieces of glass) has two holes (genus 2), and a pretzel can have three holes (genus 3).
Does a straw have 2 holes type questions?
Does a straw have, one hole, two holes, or no holes? Yes, straws. Those pieces of plastic, or metal, or plant-matter used to sip up iced coffee and soda and juice and cocktails.
Does a cylinder have 1 or 2 holes?
Two openings, one cavity. If you think of it as a cylinder, it’s two holes. If you think of it as thick block with a perimeter marginally larger than the hole it only has one hole.
How many holes does a shirt have in topology?
If the z-spiral is removed, and the network allowed to relax in 3D, the resulting surface with three holes has the topology of a T-shirt or open-handle teapot.
What does a hole in your sock mean?
Presentation. For some, a hole in the sock is the end of a once beautiful relationship. For others it’s the perfect excuse to poke your toe right through and start a puppet show in your shoes.
How many holes does a hollow sphere have?
In layman’s terms, it’s the number of “holes” an object has (“holes” interpreted in the sense of doughnut holes; a hollow sphere would be considered as having zero holes in this sense). A doughnut, or torus, has 1 such hole, while a sphere has 0.
How many holes are there in a shirt?
As a normal T-shirt, we know it has 4 holes, 2 for the arms, one for the head, and one at the waist.
How many holes are there in a polo?
There are no holes in polo. Opposing teams score goals by putting a small ball through goals at each end of a long field, 300 yards by 150 yards. Each player is mounted on a horse, and hits the ball with a long mallet. The game is fast, difficult and sometimes dangerous.
Do we say a pair of shorts?
Don’t say `a pants’ or `a shorts’. You can say a pair of pants or a pair of shorts. It doesn’t take long to choose a pair of pants. He is wearing a pair of shorts and a T-shirt.
Why are shorts called a pair?
“Pair,” from the Latin, means two like things. And pants (pantaloons) were originally two like things. You put them on one leg at a time because they actually came in two pieces. … From the beginning, about the 16th Century, pants have been referred to as a pair.
What topological shape are pants?
This half-plane is bounded by a simple open geodesic which is the limit of an infinite sequence of simple closed geodesics. Hence the closed half-plane is also maximal. A topological pair of pants is a sphere with three disjoint closed discs removed.
How is a straw made?
Polypropylene is made using propylene gas, a fuel made up of hydrogen and carbon atoms. The gas goes through a chemical reaction (polymerization), and a lot of the propylene molecules form one very long chain called polypropylene. This makes your drinking straws. Another polymer is polyethylene terephthalate.
What shape is a straw?
I guess I understand the “two holes” camp; after all, a straw is a cylinder through which liquid flows from one end to the other and that seems like two holes.
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