electromagnet, get it? and this electromagnet, guess what? this electromagnet is simply a device that concentrates the magnetic field line in a coil and then you put a piece of iron in there and the iron becomes magnetized by induction. and now it gets-- oh, look at this, a little residual magnetism. that's a fancy word for leftover magnetism, okay? it turns out this is still a little bit magnetized. hey, you wanna screw up a magnet? drop it on the floor a few times, or throw it up against the wall, or put it on a fire. would that be good for a magnet or bad for a magnet? why bad for a magnet? 'cause you're gonna jostle all the alignment out. you guys be reading about the alignment of the magnetic domains. we don't have time to talk about that today. and all these lectures-- don't we just talk about some of the icing on the cake? and you guys get the cake on the textbook, yeah? but all those domains are all lined up for a permanent magnet, right? that's the difference between this piece of iron, which is not a magnet now, and the piece of iro

what if that is passed down to a little electromagnet and you drag by that electromagnet some rusty tape. and the rust is iron oxide. when that iron oxide slides by that magnet there varying strength, you'd get on that tape then varying strength of magnetism. some as magnetized a lot, some magnetized a little bit. and the little vibrations you're getting on the tape. now you take that tape, bring it to another machine, i wanna tell you the same machine, and drag that tape at the same speed, pass an empty coil of wire, what's gonna happen to the magnetic field intensity in an empty coil of wire when that tape drags by? it's gonna change. it's gonna change, ain't that right? right. and if a piece of tape comes by that's heavily magnetized, boom, you're gonna get a big pulse of current. a little tiny bit, a little tiny-- well, you can get variations. and isn't it amazing that that tape driving by there, the empty coil, the variations in the magnetism set up variations of voltage in that wire, faraday's law, which then goes into driving the speaker. again, the plug going back and forth glued

electromagnet, get it? and this electromagnet, guess what? this electromagnet is simply a device that concentrates the magnetic field line in a coil and then you put a piece of iron in there and the iron becomes magnetized by induction. and now it gets-- oh, look at this, a little residual magnetism. that's a fancy word for leftover magnetism, okay? it turns out this is still a little bit magnetized. hey, you wanna screw up a magnet? drop it on the floor a few times, or throw it up against the wall, or put it on a fire. would that be good for a magnet or bad for a magnet? why bad for a magnet? 'cause you're gonna jostle all the alignment out. you guys be reading about the alignment of the magnetic domains. we don't have time to talk about that today. and all these lectures-- don't we just talk about some of the icing on the cake? and you guys get the cake on the textbook, yeah? but all those domains are all lined up for a permanent magnet, right? that's the difference between this piece of iron, which is not a magnet now, and the piece of iro

electromagnetic waves and the very, very small part of the electromagnetic waves. you get the whole spectrum of waves. let's start way down with the radio waves, really long, long waves. and the radio and the frequency will get a little higher, a little higher. and pretty soon, those waves-- for example, your radio antennas downtown are shaking waves up and down like a few millions times per second. that's your fm waves. a few thousand times per second, that's your am waves. but if you shook the electrons in your radio antenna up and down like a million, billion cycles per second, honey, the waves that are generated are gonna activate what? begin with ey and get the e on the end of it. eye. your eye, that's right. [laughs] remember we had the tuning forks that time and hit one tuning fork and made the other one ring? well, in your eye, you got tuning forks there too, and guess what frequency they ring at, gang? million, billion cycles per second. million, billion hertz and that's light. and light, when that light comes in your eye, it make--that sight. would you li

they use devices like an electromagnetic field detector, an on contact thermometer and to one of thels where the military stored ammo. >> reporter: despite it was a cold, rainy night, young detected heat on her camera. and there was plenty to hear echoing throughout the ship. >> we heard lot of running, a lot of footsteps and conversations. >> and then ran in to a door wide open. >> this is supposed to be a secured door. supposed to be closed and locked. i was told it was closed and locked. >> at the old pleasantton hotel, the co-owner says multiple workers have spotted a ghost. >> what they saw was a female, summing them in to the building. >> she saw a silhouette of a woman standing there staring at her. there was no one in the room. >> a customer said as she tried to open the bathroom door, someone or something was pulling on the other side. >> members of the para normal society decided to camp out. they say a woman was murdered in the 1900s in this hallway. some she was stabbed because a customer did not want to pay for her services and this happened during the gold rush era. eve

. >> i'm preparing for an electromagnetic pulse that will disable the transportation system of the united> of all there is one incident they have to be careful about. that is gigantic a solar storm when the sun has a temper tantrum. it would be somebody incidentally flipped the switch on the world. this is live right now. the last few days. it's putting out a lot of flares but we're getting a lot of electrical interference. if one of those pops out at earth that is when things go back zblad in 1859 a solar flare hit united states and europe. it caused almost worldwide failure of the telegraph system. if it were to happen today it would literally throw us back hundred years into the past before the coming of the space age and electricity and internet, but it's not doomsday. even another event will not destroy life on earth, but it could send us back hundred years. >> bill: some of you may continue to prepare for survival. there will not be a doomsday december 21. so we hope you have a great first day of the rest of your lives on december 22. 12-22-2012.

electromagnetic storms of the sun create quite a little show up in the north. that would be cool to sit out on your porch and have a nice tea and look at that. gorgeous. >> okay. check this out. we have a new camera. looking from crystal city across the river. it's our new michael and son weather cam. temperatures on the chilly side. in fact, these temperatures are really more for the average of early december. 45 right now. winds are calming down. we have high clouds coming in. and the pressure rather high. 30.47 inches. satellite picture radar combine combined. a little pes key disturbance. high clouds back into the southeast. these clouds will play cat and mouse with us later tonight and tomorrow. all the showers though and the rainfall will stay from raleigh eastward and charlotte south and eastward. but we see high clouds coming in. even though the winds have died down and the clouds are coming in. going to be a cold night. are trading no windchills for lower temperatures. kind of pick your poison really. currently, mainly in the 40s. 39 already in gathers

it's just pure energy, pure energy of electromagnetic fields, okay? and your beta particle is just electrons. and your alpha, helium nuclei. now those helium nuclei-- an alpha particle and a beta particle brought to rest will make up what's called a helium atom because this is the nucleus, this is the orbiting electron. and so the next time you see a kid walking by with a balloon filled with helium, tell the kid's mother, "hey, kid, you know what's in that balloon?" and just tell the mother, that's radioactive debris from uranium and radium and dangerous things like that. true or false? true. that's true. that's true. but these particles now have lost their energy. if you walk by an old historic site and you see an old cannon and you see some of these cannonballs all sitting, all piled up. do you get scared when you walk by those cannonballs? you don't get scared when you walk by those cannonballs. they have no more energy. not the energy they had when they were projectiles in some war or something. so just as those cannonballs don't-- are not dangero

they used an electromagnetic field detector. >> those are the sounds of the ship. >> reporter: despite that it was a cold, rainy night and no electr electricity ran on the ship, she detected heat on the camera. >> we heard conversation. >> reporter: and then ran into a door wide open. >> this is supposed to be a secure door. this is supposed to be closed and locked. i was told it was closed and locked. >> reporter: at the old pleasanton hotel co-owner brian hampton says multiple workers have spotted a ghost. >> they saw a female. >> a silhouette of a woman standing staring at her. she said there was nobody in the room. >> reporter: they also claim there was a customer that said as she tried to open a bathroom door, someone or something was pulling on the other side. so a dozen members of the east bay paranormal society decided to camp out. they say a woman was murdered in the 1900s in this hallway. >> she was stabbed because a customer did not want to pay for her services and this all happened during the gold rush era. every once in a while they see a woman standing in that window righ

they say it reflected electromagnetic waves around a cylinder.tly larger than your average wristwatch. unfortunately they have yet to manage to shield objects from visible light. only microwaves, the same type of i with as that heat your food. if you thought you could suddenly be like harry potter just vanish. for now that's still a dream. the interweb is a powerful thing especially when it comes to anything cat-related. ahead how facebook came through for two kids who really want a pet kitty. [ gordon ] for some this line is a convenience. how you doing today? i'm good thanks. how are you? i'm good. [ gordon ] but for others, it's all they can afford. every day nearly nine million older americans don't have enough to eat. anything else? no, not today. join me, aarp, and aarp foundion in the drive to end hunger by visiting drivetoendhunger.org. ii've been a superintendent for 30 some years at many different park service units across the united states. the only time i've ever had a break is when i was on maternity leave. i have retired from doing

electromagnetic spectrum is a port. we need to sustain our dominance in the under-sea domain. it is important to have submarines. they are an important part, but it is a matter of having systems. it is aircraft, it is surface ships with a corporate sonars, it is fixed systems on the bottom, and it is unman, underwater vehicles that can be autonomous. we're not far from being able to deploy all those systems. we will continue to develop and field and integrated, unmanned aerial system to operate from a carrier. this next year in fiscal year 2013, we will demonstrate an unmanned vehicle. that will lead us to build a system that we can operate within our air wings and provide that persistence, support, because if you do not have all the systems to support the pilot, that this extra weight, extra payload of extra systems, extra capability, and that will be an important part of our future. a few words about our rebalance to the asia-pacific. in our defense guidance, released a year ago, it was clear to us that we needed to be balance, we were directed to rebalance to the asia-pacif

. >> there is pursue going on the drones are released and they have a device to send out an electromagneticmpulse to disable the electronics of the car which is chased. >> reporter: there are six major car manufacturers who took part in the contest, the fun contest. one they took very seriously. everybody from gm. to mercedes-benz. subaru actually won overall. some of the concepts were small. everybody had a digital presentation. some like mercedes-benz, an actual unit on the floor. when you talk to the california huy way patrol, he was excited about how interested the companies were in trying to make them safer on the road and more efficient at their jobs. take a listen. >> i think about things like pursuit termination devices. having ability to stop a police pursuit without having a need to chase them. they're way ahead of me. they're already thinking about that. and they're implementing and building designing thinks that would stop that. that is what i'm most interested. how do you do police work, taking human element out and putting technology on board? >> reporter: every single one of

when you use electromagnetic close to a person, it changes the charge of the cells that causes disease. host: what about the possible health impacts? guest: if you listened to any of the cable networks during the fighting in gaza over the past weeks, you heard that the sound of the unmanned vehicles. it is designed to be used positively to look at traffic patterns. it is designed to be used in ways to help the community. in fact, the crash. they create noise. those things are not considered when they are deployed initially. host: david, tennessee, republican caller. caller: some of the last calls talk about it. once they have it put in place where they want the missiles or drones to go overseas, will they be the same ones the politicians will use in america? i am glad they were overseas. they should be used in the military. i do not care for them flying much over the united states. i appreciate the work he has done for us. thank you. guest: the genie has left the bottle. this is something future administrations will have to deal with when it comes to our own homeland. they will be here

we need do what i guess i would call take care of our electromagnetic high gene to know how much aretting out there that is being picked. what frequency? why do we use the frequency do. can we hop frequency as we build new systems? it will be important 39 potential adversaries and new systems that are coming in that measure that. troping magnetic spectrum is important. we need to sustain the undersea domino the undersea domain. a that's continuing a networking-approach. it's it's important have submarines. they are a main part in the undersea domain. that's a matter of having systems. it's pa aircraft, it's surface ships with the appropriate sonar and rays, it's fixed system on the bottom. it's un-- unmanned underwater vehicles that could be antonymous. we are not far from being able to deploy the system. we'll don't develop in field and integrated unmanned aerial system to froarpt a carrier. this next year, here in this fiscal year 13, we'll do a demonstration of unmanned vehicle from a carrier and recover that will be able to use that system. that will read us to building a system

so we need to do i guess what i would call take care of our electromagnetic hygiene to know how much energy we are putting out there that is being picked up if you will and how we use the frequency, can we hope frequency as we build new systems because it would be important because a lot of our potential lover series and a lot of new systems are coming in that measure exactly that. some electronic magnum and spectrum lenni to understand our dominance in the undersea domain and that is continuing and network approach. it's important to have submarines. they are the main part of dominance in the domain. but it's also a matter of having systems. it is the aircraft, its systems on the bottom and it's a man under our vehicles that it can be autonomous and we are not far from being able to deploy just all of those systems and the integrated unmanned aerial system to operate from the carrier. here in the fiscal year 13 will be a demonstration of an unmanned vehicle from a carrier and we will be able to use that system within our air wings and provided that persistence because if you want to