Cutting Definition and 128 Threads

I am independently working through the topology book called, "Introduction to Topology: Pure and Applied." I am currently in a chapter regarding manifolds. They attempt to show that a connected sum of a Torus and the Projective plane (T#P) is homeomorphic to the connected sum of a Klein Bottle...

Hi Everyone. The place I have been going to for the past 8 or 10 years to cut my hair closed down, so I went to the barber's around the corner. Now for as long as I can remember I've always had the same haircut: a number 4 clipper (or whatever the attachment is called) on the electric shaver...

Hey PF, I'm looking for a new way to cut the grass on my lawn and I'm looking to nature for inspiration. I'm an engineer, not a biologist and I could use your help with naming creatures or mechanisms that are used to cut grass, flesh, bark, etc... I've come up with the following good...

Hi guys: For basic info: wikipedia: mill cutting : conventional cutting and climb cutting, there's a graph showing how a mill cutting cuts. Yesterday in the shop my instructor taught me that climb cutting gives better surface finish than conventional cutting, yet it requires more...

Challenge: Can anyone tell me how to cut a hole in a sheet of normal Book paper the size through which even an elephant can pass...?

Girls, girls, girls. Come and give me your thoughts girls. Ponder for a moment on a hypothetical scenario in which you find yourself in a happy relationship. However, you're about to attend a yearlong study abroad program at school in a tropical country, and you're not looking forward to...

Which major puts you at the cutting edge of technology? Doesn't have to be electrical engineering or applied physics. Top 5. Thank you.

If you have a bar conductor that's moving perpendicular to a magnetic field, the magnetic force would bring all the electrons to one side of the conductor, leaving one end positive and the other end negative. If you cut the conductor in half while it is moving, will one end be positively...

Homework Statement The pruner multiplies blade-cutting power with the compound leverage mechanism. If F = 26 is applied to the handles, determine the cutting force generated at A . Assume that the contact surface at is smooth. Homework Equations M = F x dThe Attempt at a Solution I drew the...

When I ask for the best I mean the one which explains better the experiments. My problem is that I tried to learn but I´m a bit confused, I know that metal cutting theory has a large history, and it has had a lot of experimentation but when I try to find the theory it´s like it wouldn´t...

Hi, i wanted to make a laser cutting device, not the big one but a small device just to cut a few mm thick paper. I just learned from a site(www.ehow.com/m/how_6692865_make-homemade-cutting-laser.html) that you can actually convert a laser pointer to a laser cutting device by rotating the...

Hi , I want to calculate force required to cut a 1200 mm -3.5 mm sheet using incline shear blade. Anyone know what formula we can use in this case when we are cutting metal on an blade angle of 1°. Thanks Please help.

I was taught that if you cut through a cone at any angle you will end up with a circle shape at the cones edge. Is this true?

When I start to play the video, the audio will always keep going but the picture will freeze and then start back up again. I reformatted my computer like a week ago. So there is not a lot of stuff on it. And I am using Firefox. Any help will be much appreciated.

Hi, we are trying to make different pitches by cutting metal pipes at different frequincies to produce different pitches. We don't know how to determine the length at which we should cut the pipes. We want to play notes E, D, C, G to play mary had a little lamb. the outer diameter of the pipe is...

Would it be possible for a reasonably built human to abrade through hardened steel if he had a blade made out of diamond? Or is human muscle power insufficient to break the chemical bonds?

Hi, Recently, I've performed milling experimental test in order to analysis the cutting forces. The problem here is how to filter these signal force % filtering % load the filters % filt1 is stopping at 400Hz and % filt2 is stopping at 90Hz load ('Filters.mat'); flt_used=filt2; %...

Hi. I've been shaving for about 5 years or so, but recently I've been having problems. Before I did get shaving rash, but now it's getting worse and I'm also getting razor burns and cutting myself (I'm a man, btw), I also need to shave more regularly now. My father never taught me how to...

According to this book I'm reading, if you cut out a closed disc in the projective plane, then the complement of the interior of this disc is topologically a Mobius strip with boundary. Looking at the constructions of real projective space and the mobius strip from squares though, I can't see...

Folks, I'm self-taught and am currently trying to get up to date about the newest developments in field-emission microscopy and other methods of imaging sub-atomic structures. I'm able to follow (though just barely) Mikhailovskij et al.'s 2009 paper in Physical Review showing electron orbitals...

Hello everybody, I have a shape (polygon) made up from pixels (squares) similar to the image below. I need an algorithm to cut it into "lines" i.e. shapes of 1x[1..20] pixels. The lines should not be necessarily straight, but they should fill the entire area. Any ideas on where to start...

Hi, I am working to analysis cutting forces of machining process. I would like to enquire whther ANSYS workbench can do that, any idea? Thanks,,

Hi, I would like to enquire about how to design a low pass filter in order to filter the cutting forces of machining process, any idea? Thanks,,

I don't really know if this is in the right place, or what the problem is called, if its in the wrong place I'm sorry. Anyway my question is apart from intuition is there any method to solve a problem like say we have an object like a square, and we are given for instance rectangles, that in one...

I have a project where I need to cut some lexan that's about 1/8th inch thick. What's the best way to cut it? Using a saw? I thought about using heat somehow to cut it, because I have to cut a circle out of it, but I don't know how to rig up something like that. I have a little dremmel saw...

Homework Statement a tall tree and a short tree of the same mass density and width are cut at the base at the same time. why does the small tree hit the ground first? Homework Equations none. its a word problem The Attempt at a Solution gravity id pushing in different ways?

Hello everyone, new to the forum. I've been planning to make a compound bow using a cad program(Pro E), and I need a good laser cutting company to fabricate my parts. The part that concerns me most is the bow riser(black, center piece with the grip) as I want it made out of one solid piece of...

Homework Statement A uniform sphere of radius R is cut into two portions. The smaller portion S has height h measured from its flat surface, where h<R. (a) Locate the center of mass of S from its flat surface (b) Use (a) the locate the centre of mass of a hollow H which has the same...

Homework Statement Attached in picture Homework Equations N/A The Attempt at a Solution for What will happen if you cut the wire at position B? I think The light bulb will become dimmer, but not go off. Am I correct? for What will happen if you cut the wire at position D...

Hi to everyone. I'm developing a puzzle game which involves some concepts of geometry. Suppose you have a rectangle formed by points A, B, C and D. Now, I add points X1 (lies on line AB), X2 (inside the rectangle) and X3 (lies on line AC). I'd like the output to be the two rectangles...

Hi i want to know what kind of mecanism could be used to cut the 3 bottom side of a 135 cubic feet peat moss bale moving on a convoyor. i thinked about a moving down hydraulic cylinder with a Frame in U form, but i don't know how my blade will move from side to side? Maybe in a groove?? i...

There are lots of for metal cutting measurement. However, thermocouple is not in the list of metal cutting measurement. Anyway, is it possible to measure the temperature for turning machine by using K-type thermocouple. Can i put the thermocouple at the end of cutting edge to measure ? can it...

Hello Dears! I've just registered here. It sounds nice! :smile: As I've seen in different solution manuals here in my country, there are several realizations of how to cut the section we've got, to compute the resultant shearing tension of a shear loading. For instance, as you see in the...

If rolling mill is running at 10 meters per second and roller table is running at 20 meters per second. Before cutting of bar, it will move at 10 meters per second. After cutting bar has to move with the speed of 20 meters per second on roller table. How much time bar will take to reach to...

"Cutting the cord" to cable and satellite TV Last year, fewer people in the US subscribed to cable or satellite TV. The only areas with increases were the largest metropolitan areas. People are wondering how much of this is due to the economic downturn (with many people needing to cut spending...

I am currently designing an ROV manipulator arm, it has to cut mild steel cable 20mm thick and mild steel rod 12mm thick. Also it has to operate at depth of 600m. I am struggling with some calcualtions, I have chosen a cable and bar cutter, this forces a shaped cutter against the object and...

I work with a bunch of software geeks. It was someone's brithday last week and we got him a cake, one of those white rectangular ones. Someone joked about about many pieces he needed to cut it into, someone else made a joke about matricies. I said he had to cut it into a prime number of...

Just curious after watching some lasers cutting 5mm thick steel sheets very fast, what is exactly cutting the steel? Is it just a laser beam? Light only? The machines run on bottles of gas, so if not, what exactly is the beam made of? thanks

Hello; When you cut a magnet that has north and south poles, you get two magnets with north and south poles. If I cut a million magnets out of it, each of those magnets will have north and south poles. However, what happens when I cut down to the last electron? Will that electron still have a...

I was just wondering how I can start out with a parallelepiped only cutting 4 faces vertically, at right angles to the edges I cut through & rearrange the pieces so that I can get rectangular box so that the volume is the area of the base times the height. I have done the first cut, a cut...

Homework Statement Take an Isosceles triangle with a height of 10 and draw a line parallel to the base. How far from the top of the triangle does the drawn line have to be for the top half's area to equal the bottom half's area. Homework Equations The area of a triangle...

How do you think the U.S. will cut medical cost?

Here is a problem from a physics contest of two years ago. I've translated it from Persian but it might have some problems because of my lack of good English. Problem: Assume a water pipe is in the middle room and the water is going through it. How can we find out the direction of water without...

Homework Statement A spring with spring constant 8 N m-1 is cut into 2 equal parts. Find the spring constant of each part? Homework Equations The Attempt at a Solution Spring constant of each part = 16 N m-1 Above is the answer given. 1. Why should we times 2? 2. If the...

Hello friends, I am in the process of acquiring a 4'x14' blackboard for free. The problem: it's a 4'x14' blackboard. I want a one for my apartment, however something of this magnitude would challenge the dimensions of my living quarters (not to mention I would have to rent a uhaul to move...

Hello. I've just found this forum as I am looking for an answer to a question. For what it's worth, by way of introduction, I am a software and telephony engineer, with interests in aviation, boat design, and energy-efficient houses. I also write when I can. Here's my question. Plenty...

As the title suggests, i have to make cuts in a piece of plastic about the same dimensions as a credit card. the shapes themselves are fairly simple, mostly triangles, with 4 quarter circles on the corners. the device i have in mind would be something which i guess looks like a mechanical...

"cutting" movies short One of the things I enjoy after seeing a god awful movie is looking up the reviews for the movies. I notice in a lot of the movies, that a typical excuse for a bad movie is that the film was cut short by the company producing the film. Now, does this mean the film was...

Hi, I have a question about the "QFT in a nutshell"-book by A. Zee, chapter 3.1 (page 148-149). It's about renormalization and regularization, and I still don't get the exact point. Zee looks at meson-meson scattering in \lambda^{4} theory. The \lambda^{2}-term is a diverging integral, as...

There is a feast going on. 64 people are invited. A jumbo size cake is to be served which is 8ft x 8ft. However before cutting the cake a new guest comes on. So now 65 peoplw have to serve. How the cake should be cut into equal 65 squares (A square can have no more than 2 pieces, i.e. more than...