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Technology

The practical application of knowledge, especially in a particular area, is called technology. Advances in technology affect every area of our lives. This category is for questions about technology and includes everything from how to remove a scratch from a CD to applications of electronics to what polyester is made from and more.

35,090 Questions

What is the exam date of diploma winter 2008?

tell me time table of ME 2C drawing, ME 3C and 4C tell me time table of ME 2C drawing, ME 3C and 4C

What alows you to immediately exit a program without rebooting the computer?

what will alow you to immediately exit the program without rebooting your computer

What technology uses radio signals to communicate with a tag placed in or attached to an object an animal or a person?

The technology that uses radio signals to communicate with a tag placed in or attached to an object, animal, or person is called RFID (radio-frequency identification). RFID tags or chips are attached to objects, animals, or people, and RFID readers can send and receive signals from these tags using radio frequency (RF) technology. The RFID reader sends a signal to the tag, which responds with the stored data. This allows for identification, tracking, and data transfer between the tagged objects and the reader. RFID is commonly used in applications such as supply chain management, animal tracking, and electronic payment systems.

What do you mean by Internet and E-commerce?

E-commerce is the process of to do business on the internet and it refers to purchase and sale good/services via electronic channels, like the internet. E-commerce is the paperless process of sharing business information and transaction.

Why technology is important in the classroom?

Technology is used in teaching to improve student learning. Our global community is based on technology. This is what the children of today need to learn for their lives as adults in the future.

Why is my boiler water orange?

It could be that the pipes and boiler is showing iron rust and corrosion.

What if remote doesn't work on tv?

The television may be at fault. Try using a known good remote. If it doesn't work and you are not blocking the signal with items sitting in front of the TV and the sensor panel is clean then that is what you tell them at the shop.

How are you watching a DVD?

A DVD-R is a type of disc. It does not contain any data when purchased, and it does not dictate what type of data is put on it. Assuming the data on it can be "watched", you could either put it in a standard DVD player (if burned as a movie DVD) or double-click the files on it on your computer.

Does a DVD still work after you rip it?

Yes, when you rip a DVD you are just basically converting one file into another, leaving the original file on the DVD and creating a copy of that file in a different format on your computer. It does not erase the original file unless you have an erasable DVD disc and you choose to erase it.

How many bytes make up a Terabyte?

One tera byte is 1,099,511,627,776 (240) bytes, in traditional computer memory terms, or 1,000,000,000,000 (1012) bytes, in computer communications terms. Usage is sometimes confusing, because not everyone uses the same nomenclature.

Does a refrigerator have parallel and series circuits?

A Refrigerator is technically a series because if one wire goes out all of the others go out

How many chips do supercomputer have?

Intel 4004 2,300 (first Intel chip)

Pentium 3,100,000 (windows 95)

core i7 quad: 731,000,000 (best personal chip out now)

8-Core Xeon Nehalem-EX 2,300,000,000 (supercomputer chip)

What is the code for a gpx DVD player with a rca universal remote?

Try with: 0699, 0769, 20699,20769,704 or 052

I could not get it to work with either of them (with slight variations).

What is a satellite pcr pid?

I think it just stands for Packet ID. From my very limited experience I believe that it has do with a code signal that provides information that allows a receiver to separate the different media signals coming from a single satellite. There is a VPID for video and an APID for audio. I am sure this explanation is probably flawed. I only know what I know from researching Free To Air satellite TV. Hooray for Free Satellite TV! There was one site that explained it, but I can't remember the site or what they said. But, I did find some info here: http://www.satelliteguys.us/free-air-fta-discussion/106432-thelist.html You could just post this question on that forum and I am sure one of the satellite guys would help.

http://satelliteguys.us/free-air-fta-discussion/ I hope this helps :)

When was Huawei created?

Huawei Ascend was created on 2010-10-27.

How much audio can be put on a CD?

Let us consider a mp3 song, each 4MB of space. A CD has 700MB of free space out of which it is optimal to store upto 698MB. So 698/4=174.5 songs.

Better to go with 170 songs, but a song doesn't need to be exactly 4MB, it would be better to go with 150 songs.

Thank you. Suneel.

This answer is wrong. How many songs you can fit on a CD is dependent on how many minutes the CD will hold. Most CDs these days hold 80 minutes worth of music (it will say on the CD packaging). So, if you're in iTunes, the bottom of the playlist window will display total time, keep it under 1:18:00 (1 hour and 18 minutes) - CDs don't quite hold what they say they will so you have to keep it under the advertised time.

Both the above answers are correct! The amount of songs a CD holds depends on the size of the files (i.e. the way you burn it). Were you to burn an "MP3 Disc" your CD can hold up around 150-170 files, depending on the size of the files. On the other hand, were you to burn an "Audio CD" you're normally able to burn 18-24 songs (i.e. 80 minutes). Again, this difference occurs because of the way the files are copied onto the disc itself.

~ nkindianhobo

What is the working principle of cyclotron?

The cyclotron is a charged particle accelerator. It worked well enough to net Ernie Lawrence, its inventor, a Nobel Prize in physics for creating and developing it. (Props to Hungarian Sándor Gaál, but word on the street is that he was a bit later than our boy Ernie.) This thing isn't all the complex, but since we're here on the page, we'll have to jump around a little bit to get it all laid out. Better buckle up. We'll touch on theory here and there and do the mechanics along the way in bits and pieces to arrive at a working end product. Hopefully. Let's build one, plug it in and fire it up to see what happens. Use the links where suggested. (You won't be Rickrolled. Promise.) We'll start with a bit of background. Ready? Step up.

One of the four basic forces in the universe is the electromagnetic force. Not the electric force. Not the magnetic force. The electromagnetic force. Electrostatics and magnetics are inseparably intertwined. Any time a charged particle moves, it creates a little magnetic field around its path of travel. All the time. Every time. That sets the stage for interaction between charged particles and magnetic fields. Any time there is relative motion between a charged particle and a magnetic field, a force will act between them. Movement can result. Relative motion means the charged particle must be moving "across" or "through" magnetic lines of force and not "along" or parallel with them. You already know the basic law of electrostatics: opposite charges attract and like charges repel, yes? Good. Let's jump.

Picture a hockey puck. Now picture it bigger in diameter, but not in thickness. Make it as big as, say, a small dinner plate. Got it? A thin disc is what we've got. Now picture it made of metal. Now picture it hollow so we have only the shell. Just a dinner plate sized disc that's hollow. We good? Now cut it in half across its diameter and you'll have two things shaped like the letter "D" and they'll be hollow. Put them in a fixture to hold them in the position they were just after you cut them. What you've got is your original disc cut in half with the openings facing each other and a little gap between them. That hollow space inside is the "cavity" and it's going to be the "playground" for our particles. And the gap between them is going to let us hook up a power supply to the two halves, to the two D's, and charge them oppositely when we need to. A couple more things and we're tight.

First, punch a hole in the outside of a D to form an exit from the cavity. Then put the whole thing in a close-fitting package so we can pump all the air out from inside and around the D's and their little electrical insulators that support them. Remember the little hole we made in one of the D's? We need to have a hole in our package to let the particles out after they come out the hole in the D. Now focus. The particles are going to be coming out in a tangent from the edge of the disc. Picture this clearly. A particle is going to be moving along the inside edge of the cavity in a virtual circle. It's going to be moving in a circular path, and will slip out the exit and travel in a straight (tangent) line coming out from there, and that's the way we have to arrange our "exit tunnel" from the setup. If someone was swinging a weight on a string about himself, and the string broke, the weight would fly off in a straight line, a tangent, from the point where it was when the string broke. Our hole in the D and the outlet tunnel or tube will facilitate that kind of exit, will make up that path, okay? Check the GSU hyperphysics link at this point to see a drawing of the internal setup and then come back 'cause we're ready to jump. Here we go.

We're gonna build a big, big electromagnet. Picture a big log. Make it about, what the heck, three feet in diameter. It's big. And pretty long. Now picture it made of iron. One big, cylindrical chunk of iron. Then wrap about a zillion turns of heavy gauge wire around the middle. Leave room at the ends of the log so we can bend them. Now stand the log on end and bend both ends over and toward each other to make a big letter "C" out of them. Got it? Our coil is in the middle of the "back" of the C and the ends come over, come around and come in to create a little gap between them. Just big enough to put our little package in. Our package is the set of D's. It just fits inside the gap at the ends of the big C we just made. If we then take the ends of the wire we used to wrap the coil and hook them to a giant DC source, we will get a ton of current through the coil and create a super electromagnet with a crazy dense field across the little gap where our sealed and evacuated package is going to be sitting. The lines of force of the magnetic field are straight across the gap of the C, and they are perpendicular to the plane of our D's in our package. That's an important concept. The plane of the D's is at a right angle to the lines of force of the standing magnetic field were are generating when we turn on the electromagnet. Go to the Wikipedia cyclotron article at this point and scroll down to the picture of the young woman standing outside next to a cyclotron electromagnet and pole piece assembly. You can see this one is actually two "C's" (they're the dark things at the near and far end) that support the white circular structures. The little space between the white thingies is where our package with the D's will go. It's gonna sit right between the pole pieces. We good?

Let's review. We've got a couple of hollow D's sitting on insulators with a tiny gap between them. We've got a wire hooked to each D so we can electrify them. We've got all that inside a case so we can pump down the pressure and create a vacuum. The package is sitting inside a sick magnetic field that we are maintaining by using enough electricity (though we use DC) to power up a small town. Let's hook up our "D wires" to a large, high frequency alternating voltage source so we can fire the thing up and get down.

Though the cyclotron can be used to accelerate electrons or protons, protons were arguably more useful to physics. And they're a lot more fun! Hey, we just built a particle accelerator! You wanna shoot ping pong balls out of it or bowling balls, hmm? Thought so. We need some protons. Has UPS come yet? Forget it. We'll just make some. Where's the hydrogen? Get that gas over here. We pump some hydrogen into a "stripper" that uses high voltage to ionize the gas. With the electron torn away, we have a hydrogen nucleus. A proton. Sometimes with a neutron. Or even two. We get these into the middle of the cavity created by our hollow D's. Now the fun begins!

We apply a high voltage to the D's. One D is positive and the other D is negative. The protons are positive. They are electrostatically attracted to the negative D and repelled by the positive D and they move. Oh, but bad news. There is a wicked magnetic field that they have to swim through. So they are deflected. It's gets tricky here, but you've come this far. It's only one more jump. As the protons are pushed by one D and pulled by the other, they move and cross the gap. And as they cross the gap, we reverse the polarity of the voltage to the D's. The protons are, like, "We just came from over there because we were pushed out by the positive and pulled here by the negative and now you go and reverse the polarity of the voltage on the D's and we have to go back! What's up with that?" So the protons are going to want to respond to the changing voltage and go back and forth across the gap between the D's. But with the giant magnetic field through which those little guys have to move, they travel in an arc. What happens is that as they move back and forth and gain energy and move in an arc, they actually spiral from inside to outside of the D's. Break here to focus on this:

This complex motion, the vectors carved out by the moving charges in response to the electrostatic fields and to the "skew" created when their own motion-generated magnetic field interacts with the standing magnetic field we created with our magnet, is the heart and soul of what makes this machine work, is what this machine is all about.

In finishing, the positive ions (protons, plus, maybe a neutron or even two) gain energy with every moment and end up really hauling butt by the time they reach the outer edge of the playground. They fly out through the outlet (on that tangent we talked about) and down the goodbye tunnel we set up in our package and end up slamming into a target we place at the end of the run. Blamm! Proton-target interaction. Scattering. And if we "rig" our hydrogen to improve heavy hydrogen concentration a la heavy water, we can shoot bigger bullets on a regular basis. The capture of heavy hydrogen will allow us to up the percentage of proton-neutron nuclei and proton-neutron-neutron nuclei we use as the bullets in our particle cannon. It just seems to keep getting better! Imagine the possibilities for scattering.

Skim the articles and tighten your grip on the operation of the machine that changed physics. We've skipped some little things, and (probably more importantly) all the tedious math associated with the operation of the machine. By just sticking to basics and sketching it, we've got a fairly good idea of how the thing works. By the way, the math isn't really tedious. And it isn't that tough. As your math skillz improve, you can come back and tear up the formulae presented in all the articles. It isn't that difficult, really. It's not rocket science. Just nuclear physics. Big difference. Hey look, Mom! I'm doing nuclear physics!

What is the function of a DC power supply?

By Khalid Betani

Direct current (DC) is the unidirectional flow of electric charge. Direct current is produced by sources such as batteries, thermocouples, solar cells, and commutator-type electric machines of the dynamo type.

So the function of a DC Power Supply is to provide Direct current to various accessories of computer such as Hard Disk, Ram, Picture Tube or LCD, Mother Board, CD Rom/DVD Rom, etc, so that they function properly.

What is the symbol of a headphone?

Look on your pcs headphone jack (the green one). It should be a headset with mic

What to do when your flip video wont turn on?

First, try holding down the power button on the side for 10 seconds. If that doesn't work, take a piece of lead from a mechanical pencil (or something else like that) and look on the bottom. Inside the little silver thing that you use to put it on a tripod, there's a tiny black button. Press that with the lead and hold it. It should be working after that.

How do people use fluid technologies?

People use it for their plumbing, the air brakes on trucks, hydraulics, etc.