why do donut have holes?
144992
Because it they didn't they would just be called a bun....\n\n;-)
910418
I guess because the paddle has holes in it.
506644
1. Its impossible for a circluar shape to fall in. If it was a square, it could have easliy fallen in.\n\n2. Its easier to roll a circular cover to the hole, rather than carry a sqauare cover on a wheelbarrow.\n\n3. Its so easy to fit a circular cover to the hole, whereas a square one will have to be turned to the correct alignment to fit. (Sorry for the 3rd. LOL).
626305
Because you can read/see something better through a smaller hole. It's just like making a small circle with your index finger and thumb, if you look through it you can see a lot better!
746934
cause they are @$$holes!\n\nDo you want me to sock some pain on them?
284989
How about an automated donut shop.\n\nSay 8 - 10 different types of donuts ranging from 100 to 1000 donuts each which need to be produced each day to meet various size of orders.\n\nThe different ingredients and cooking time should be a good challenge.
202646
Sour cream cake donuts are oh so yummy; I drink water so it will not take away from the taste. Since water refreshes the palette, the donut stays sweet;-D
656252
It is because the round or circular shape is the most uniform shape of all (there are no edges or corners) - this means the amount of stress force exerted from the surrounding soil is uniformly distributed onto it; wheareas if it was some other shape with corners or edges, then stress concentration would be higher at those places, which would cause cracks/erosion that can destroy the pothole.
266592
There are a whole slew of reasons why manhole covers are round.  The covers are made of cast iron and so are very heavy.  By making them round they can be rolled rather than carried from place to place on the job.  The tunnels leading to the covers are almost always round, for structural as well as ease of digging reasons.  Since the tunnels are round it made sense to make the cover round.  If the covers were square, rectangular, etc. the cover would have to be in a particular orientation in order to fit the hole.  In addition the cover could fall into the hole if it were square or rectangular (or any other shape than round).  Finally it may boil down to "that's the way they always been made" kind of thinking.  Someone started making them round when they first started and everyone else followed
212565
Here's the donut cross-section (cut it in half and look at the two cut ends, which are the circles):\n\nO O\n\nIf R is the distance from the center of the donut (the hole) to the center of one of the circles, and r is the radius of one of the circles, the surface area is:\n\nA = 4 * pi^2 * R * r\n\nAnd the Volume is:\n\nV = = 2 * pi^2 * R * r^2
510342
Swiss cheese holes are caused by gassy bacteria. In order to make cheese, you need the help of bacteria. Starter cultures containing bacteria are added to milk, where they create lactic acid, essential for producing cheese. Various types of bacteria can be used to make cheese, and some cheeses require several different bacteria to give them a particular flavor. \nPropionibacter shermani is one of the three types of bacteria used to make Swiss cheese, and it's responsible for the cheese's distinctive holes. Once P. shermani is added to the cheese mixture and warmed, bubbles of carbon dioxide form. These bubbles become holes in the final product. Cheesemakers can control the size of the holes by changing the acidity, temperature, and curing time of the mixture. Incidentally, those holes are technically called "eyes," and the proper Swiss name for the cheese is Emmentaler.
821694
It's round because it has enough gravity to make it round, the force of gravity crushing away irregularities until a round shape is achieved. There's actually a limit in astronomy, anything with more mass then a certain amount will as a rule be round.\n\nAs for the holes, I assume you mean the craters. They are there because we're basically living in a shooting gallery of asteriods, comets, and meteors. On the moon there are no erosive forces so when one hits it the impact crater remains.
63654
A padded donut for like when people break their butt bone. Comes in different sizes. Can buy almost anywhere. Comes in different colors, shapes, sizes and firmness's. Hope this helps
220965
They are creating energy.  I assume that you are talking about those clocks that you plug into the potatoe.\n\nTHe answer is that the potatoe is slowely rotting (its not rotten yet, just starting inside).  Every vegetable and meat, even when fresh, is starting to degrade like this.\n\nAnd this creates heat and energy. Thats why compost piles smoke a little or steam.
90629
See this site for everything you ever wanted to know about holes-in-one!\n\nhttp://www.holeinone.com/
1015954
Squirrels gather and store nuts and they usually store them by burying them, which is why they dig.\n\nHere are a couple of good links.
1059188
A penny with a hole in it is worthless because you can't spend it, so it is hopeless - there's no help for it since you obviously can't fix the hole in the penny. That's what it means. I don't know the origin though - sorry! Will look it up first and I'll get back to you if I find it.