Cutting Definition and 128 Threads

Today I saw a UPS man on a bicycle towing a trailer full of packages. Do you suppose that the driver... I mean peddler... gets a cut of the fuel savings, or does he just get the benifit of the exercise.

Popular math books usually explain topology as the study of spaces allowing strecthing and shrinking and some cutting and pasting, but what the formal definitions of the intuitive operations "cutting","pasting","strecthing","shrinking" according to mathematics?

Now we know Evo is ok ish i will tell of my latest, While cutting a seized inner bearing off a 60 mm shaft the cutting disc exploded and cut my finger to the bone, luckily i was wearing a a safety mask as a shard cut a grove in it, the last time i used a cutting disc i set my overalls on fire.

What is your favorite way of finding out about what is going on? I don’t suppose that anyone has the time to read all the papers that are published. If you are not working in a particular field, ( hehehe … meaning … you are an amateur) but are interested in finding out what is happening, what...

Two questions: 1. How to shave? cream on shaver then shave or cream on face then shave? 2. I just cut my lip and blood comes out easily. What do I do?

Hello everyone. I'd like to thank everyone for their help in advance. Ok, here we go. I've got bars of known length (240"). And, I've got to cut equal numbers of 5 different length pieces. The lengths are: 72.16", 71.64", 68.94", 45.46", and 44.13" The whole point is to minimize the...

I am wondering whether someone can suggest a good ref or two (preferrably with worked example) on how to use Cutkosky (or whatever it is called) cutting rules in QFT to help pick out the absorptive/Imaginary part of a 1- or 2-loops diagrams. I have already tried Peskin and Schroeder, which is...

I am wondering whether someone can suggest a good ref or two (preferrably with worked example) on how to use Cutkosky (or whatever it is called) cutting rules in OFT to help pick out the absorptive part of a 1- or 2-loops diagram. I have already tried Peskin and Schroder, which is good only up...

Can anyone give me some examples of some of the most cutting-edge/futuristic/"we're not there yet" applications for semiconductors? You know... the "exciting" stuff. :biggrin: I'm doing an informal presentation for my solid state class, and wanted to get some ideas of what I should research...

I am looking for an explanation about a simple physics phenomen. When washing plates and ustensils, I would manipulate knives and, from times to times, would cut myself a bit. Does it matter if your hands are wet or dry and what does the water do on the surface of the skin that can influence...

Could somebody help me to get information of cutting speed and depth of cut for ceramic cutting tools? I would need to have a data for all the ceramic types. Thanks!

Hello everyone, I have a few questions about ceramic cutting tools. What properties should a ceramic cutting tool (for lathe or shaper) must have? What tests should be performed on the material/tool? Where can I find details about those test? What are the ASTM stadard for those tests? I would...

So, I've read that cutting is essentially where the edge of the knife (or whatever cutting instrument) applies enough force to overcome the intermolecular forces in the object. A more dense object will have greater molecular forces, hence more difficult to cut (in the conventional cutting sense...

a square with dimensions (a x a),a quater circle is cut out which has the radius r.Find the center of area of the remaining part. i found the coordinate for the removed quater circle which is a-4r/3pi , but i don't know how to find the cenroid of the remaining part. anybody pls help thanx

Forces at play during "Cutting"? I'm involved in a debate over the broadheads (arrowheads using multiple razor-sharp metal blades) for bow hunters. I need a little help in the physics dept. I'm arguing that the sharpness of a blade is less important than than the fact that there IS a...

We're all familiar to the fact that when you for example put two fingers together, they aren't really physically touching each other, it's the electromagnetic forces of the atoms from the different fingers resisting each other... which in turn translates to our nerves and finally our brain in...

sir why cutting speed of soft material like aluminium is high ?

Does the following make any sense (after : "Is (physical) love worth something ?") : If you give in any way money to the other party directly, then we call it prostitution, because the money should be stored in a common way, and hence other systems are not indicating true love ? (How to...

How are materials like Silicon Carbide or Aluminium oxide which are strong and have high melting points shaped and cut? Just wondering. Is a diamond tipped cutter used or something?

A dice has 6 sides. If you cut the corners of a dice you get 6 + 8 = 14 sides. If you cut again, the minimum number of sides you get is 6 + 8 + 12. If you cut n times, what is the minimum number of sides you get?

"Review of Cosmic Vision 2015-2025" begins: "The Cosmic Vision workshop at UNESCO on 15-16 September 2004 showed that Europe is richer than ever in ideas for what should be done in space science in the coming years. This workshop brought us a major step forward in developing the vision of the...

Does anyone know any ways af drastically cutting down the amount of sleep one needs?

assume that we have an area of 20*30 meters, and we want to cut it to some parts of specified areas. I want to know when is it possible? Of course the first assumpsion should be: the sum of the areas should not exceed the total area. I know we need another assumpsion. What is it? And if the...

Had an interesting concept in physics class today. What would happen to a bungee jumper if right at the apex of his jump (when the resultant forces are zero) someone cut the cord? Would he go splat or just hit the ground without too much damage? For ease, let's say that at the apex he is a...

Does anybody know about any conventions for the ages at which trees of different species can be cut? does it vary by country or is there any international agreement on it?

I have this box and I need to cut a rectangular opening to expose my led display. My question is there a tool to make a clean cut of the rectangular shape opening? I tried using a rotary but it is not a very smooth cut. Is there a way to do it using everyday tools?

Would you want to see cutting edge theoretical debates? Howdy everyone, I am doing a little bit of 'research' for a website idea of mine and I am very very eager for some feedback on it. Essentially I want to know if you, the people of our world who are interested in...

Hello, I am trying to follow an example/explanation, but with no luck. Here is the question: Let n be the number of cuts and let an be the maximum number of pieces. Now it is clear that a0 = 1 and a1 = 2. Since we want to maximize the number of pieces, we ensure that two cuts cross...