Tungsten Lamp How is it possible for a halogen lamp to operate with the filament at 2700 degree .....?
How is it possible for a halogen lamp to operate with the filament at 2700 degree Celsius when the tungsten would normally decompose/oxidize at this high temperature?
and:
Is such a high operating temperature desirable?
The molecules do burn off the filament but as they are enclosed in a quartz bulb w. a special gas they buzz around until they settle back down on the filament time and again.
In some applications the heat is the whole point, halogen cookers, usually it's just not relevant.
45900 FloodlightTungsten Halogen FloodlightJABSCO Tungsten Halogen Floodlight is designed to evenly light any horizontal surface. Unique trapezoidal light beam allows light to spread with even intensity when lamp is mounted from above at one end of a work area. Ideal for lighting deck or work surface from cabin top spoiler or Tuna Tower. Great for R.V. use such as lighting a campsite. Also ideal for emergency vehicles.Product : JABSCO 3 X 5 TUNGSTEN HALOGEN FLOODLIGHT Manufacturer : JABSCO Manufacturer Part No : 459001000 UPC : 671880039086
Adapta-Light A5 250 Watt Tungsten Flood Light with 5" Reflector 5" diameter reflector with lamp socket that yields a 60 Degree beam with a 250 watt lamp. Designed to be used with a photoflood lamp of up to 500 watts, the Adapta-Lights quickly mount to any 3/8" lightstand or stud. Lamps not included.Rating Max 250 wattsSocket (Lampholder) Phenolic socketReflector (Mirror) Chemically etched aluminumMounting 3/8" Stand mount
The mains operated desk lamp has a 72 high intensity LED light that is ideal for reading and working or as a casual background light source. This desk lamp is also used in the treatment of SAD (seasonal affective disorder). The full spectrum lighting provides a more natural light than conventional yellow tungsten bulbs or harsh fluorescent bulbs.1240 lux at 50cm.Size H19, W11, D4cm.Hand switch.No wiring required.LEDs (included).Manufacturer's 2 year guarantee.EAN/MPN/UPC/ISBN: 5019487082565.
600 W 600 W Halogen Projector Lamp 75 Hour 75 Hour Average Tungsten halogen lamp with 120-volt output provides super bright light, long life and accurate color for overhead projectors. 2-pin projection lamp with ceramic base. ACCO Brands Corporation Apollo Overhead Projector Lamp Projector Lamp VA-DYS-6 www.acco.com
High Quality Content by WIKIPEDIA articles High Quality Content by WIKIPEDIA articles Tungsten(VI) oxide, also known as tungsten trioxide or tungstic anhydride, WO3, is a chemical compound containing oxygen and the transition metal tungsten. It is obtained as an intermediate in the recovery of tungsten from its minerals. Tungsten ores are treated with alkalis to produce WO3. Further reaction with carbon or hydrogen gas reduces tungsten trioxide to the pure metal.Tungsten(VI) oxide occurs naturally in form of hydrates, which include minerals: tungstite WO3H2O, meymacite WO32H2O and hydrotungstite (of same composition as meymacite, however sometimes written as H2WO4). These minerals are rare to very rare secondary tungsten minerals. Author: Surhone, Lambert M./ Timpledon, Miriam T./ Marseken, Susan F. Binding Type: Paperback Number of Pages: 184 Publication Date: 2010/07/30 Language: English Dimensions: 6.00 x 9.00 x 0.42 inches
if you dont know all of them, can you please give me some web sites, thanks.!!
Resistor - controls the flow of current - same - Not a semi
Variable Resistor - Same as Above adjustable - not a semi
Electrolytic Cap - Holds a charge, blocks DC current, Polarized for use in one polarity (+/-) only, tend to be high value - filters out noise - not a semi
MKT Capacitor - Same as Above but usually smaller in value range - not a semi
Green Cap Capacitor - very small value but like other Caps
NPN Transistor - semiconductor device, regulates current - uses positive current from Base to Emitter to increase current through the device, used in amplifier and switching circuits.
PNP Transistor - Same as NPN but uses negative current from base to collector to control current through the device.
LED Light Emitting Diode - semiconductor device that emits light when current passes through it
Power diode - semiconductor device that allows large amounts of current to flow in one direction only - used in power circuits to suppress transformer fly back and to rectify AC voltage to DC
Signal Diode - semiconductor device like power diode but with smaller current capacity - used in logic circuits and small signal applications
Momentary Switch - device that provides momentary current path - can be semiconductor or mechanical
Toggle switch - device that provides switchable stable current path - can be semiconductor or mechanical but usually thought of in machanical switch sense
Battery Clip - mechanical device that connects a circuit to a battery
Transformer - two or more coils of wire wound on a common core that magnetically transfers AC voltages from one coil to another - not a semi
Speaker - device that acts as a transducer to convert voltages to sound - can be semi or coil and magnet
Light Dependant Resistor - a resistor (see above) whose value changes when light strikes the device
Microphone - exactly like a speaker only works in reverse to change sound waves into electrical signals
Light emitting diode. Oleg Losev, List of LED failure modes, Organic light emitting diode, Miniature light emitting diode, Solid state lighting, LED lamp, LED power sources, Electrical polarity of LEDs, LED circuit, LED as light sensor Author: Miller, Frederic P./ Vandome, Agnes F./ McBrewster, John Binding Type: Paperback Number of Pages: 74 Publication Date: 2009/10/08 Language: English Dimensions: 5.98 x 9.01 x 0.17 inches
Clipper Clipmaster Clipping Machine - Blue Perfect for detailed clipping on horses, lambs and cattle, these lightweight, cool-running, versatile clippers will get the job done quickly and efficiently. Infinite speed settings and an adjustable tension kno
A kid who is still struggling with the loss of a parent has an unexpected challenge thrown in his path in this coming-of-age drama. Adam (Evan Peters) has just wrapped up his last year in middle school, and is waiting out the summer before he enters high school. Adam is still dealing with the death of his mother and younger sister in a car wreck two years earlier. In tribute to them, Adam hasn't cut his hair since the accident, while Adam's father (Chris Eigeman) prefers to blunt his own sorrows by drinking and giving his son bad advice. Given to angry outbursts of violence, Adam finds he's better off turning to his grandmother (Louise Fletcher) or Father Dan (Kevin Sorbo), an open-minded priest who prefers talking to kids on the basketball court rather than in the church rectory. Over the summer, Adam makes friends with Johnny (Bryan Burke), but he also gains an enemy -- Jerry (Donato Mario Alleva), an older student with a bullying personality and a hatred of long hair. ~ Mark Deming, Rovi
In Store Used USED KEELEY SD1 STACKED IC amp; CLIPPING
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Harley Benton GA5 Metal
please explain me about clipping and clamping circuits?
it is in diode uses
1) Clipping : clipping is nothing but the process of cutting / chopping off any desired amount of an AC signal / waveform.
for example, if u have a signal of 7 VAC, and u want to feed it to a system which accepts only 5 V signal, then clipper can be used to chop off excess 2 V. diodes can be used in Clipping.
where as,
2) Clamping is raising / adding / boosting the input signal by any desired voltage value.
Ex; consider an electrical systems accepts only 5 V as an i/p, but u have 3 V signals. By Clamping this i/p, u can raise it value to apparent 3+2=5 V value.
Mine eye and heart are at a mortal war
How to divide the conquest of thy sight;
Mine eye my heart thy picture's sight would bar,
My heart mine eye the freedom of that right.
My heart doth plead that thou in him dost lie
A closet never pierced with crystal eyes
But the defendant doth that plea deny
And says in him thy fair appearance lies.
To decide this title is impaneled
A quest of thoughts, all tenants to the heart,
And by their verdict is determined
The clear eye's moiety and the dear heart's part,
As thus: mine eye's due is thy outward part,
And my heart's right thy inward of heart
Do I love you for your outward beauty, or is it your inner nature (your heart) which so closely matches mine? Why, I think I'll take both, thanks.
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"Crystal Bar EP" - Fred Kinbom
HELP ME NOWW 10 EASYYYY POiNTSS!!!!!!!!!!!!!!!!!!!!!!?
I just want to know if my answers are right. And if Im wrong please correct them. And I am having trouble finding two substances, please someone give me the answers =( And write why you think it is that substance too please, it wud help me understand it more rather than just getting the answer. Thanks guys!
1.) Decide if each sample in the table below is a mixture or a pure substance. If it is a mixture, list two substances that are part of the mixture.
a.) Fresh orange juice- pure substance
b.) Orange drink made from crystals-mixture-Two substances:
c.) Shampoo-mixture-Two substances:
d.) 2% milk-mixture-Two substances:
e.) table salt(non-iodized)-
f.) chocolate bar-mixture-Two substances:
g.) concrete-mixture-Two substances
h.) white sugar-Pure substance
i.) lemon lime soda-mixture-Two substances:
j.) window cleaner-mixture-Two substances:
Laser Glass Lens is it possible to cure the eyes totally in a natural way?other than laser treatments?
i've been wearing glases since i was 7 years.ive got short,long sightness and astic...im 16 right now and my lens power has reach 700..im getting worried cause i play physical games suh as football.it affecting my appearence...i heard of many stories where ppl with really thick glasses have been cured naturally after living in a green enviroment...im not at all interested in laser treatment..i suspect an incurvature of my cornea ...i was thinkin if there is any naturally way that can completly cure my eyes to normal..i wanna enjoy life..........PLZZZZZZZZZZZ HELP.!!!!!!!....ThX
I'm not sure what "short,long sightness and astic" means, but if you are farsighted or nearsighted, there is no "cure" because these are not diseases. It simply means that your eye is shaped or sized differently than those who do not need correction. There is no natural way to change the size and shape of your eye, so no, there is no way to naturally change your eyesight. Your eyesight will continue to change as you grow and should stabilize in your twenties. If you are playing sports, I suggest some safety glasses designed for that purpose or contact lenses. Contacts are also a good option for anytime you don't want to wear your glasses. Just talk to your optometrist about it. There is no reason why you cannot enjoy life simply because you need vision correction.
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All-in-one kit helps you protect and preserve the functionality of your optics so you can see the target clearly. Includes the necessary components to remove oil dirt and dust from glass and optics-grade carbonate leaving it resistant to fogging and further dust contamination. Use to clean lenses on scopes rangefinders laser sighting devices binoculars cameras and eyeglasses without damage or scratching. Mfg: Otis SPECS: Kit contents: ½ fl. oz. (14 ml) of lens cleaner mohair lens brush anti-fog lens swabs lens tissues and lens cleaning cloth.
The CD and DVD Laser Lens Cleaner is specially designed to remove dust from a CD and DVD Player's lens. The 7 sound optimization tools are designed to optimize the sound quality of your stereo system.
- Replacement of 410 laser lens ribbon cable for PS3 - It is the perfect replacement for your damaged or broken laser lens ribbon cable - Easy to install no special tools required - Compatible with: PS3 410 ?
- Brand new and replacement KES-470A for PS3 Silm- This laser lens can replace the broken, damaged or cracked one of your PS3 Slim console perfectly.- This laser lens will fix the normal problems
56500 56500 Laser Lens Cleaner Eight brush system cleans off the entire laser lens Will not damage sensitive optical components Enjoy your Netflix titles more or improve your music archive by cleaning your optics in your CD or DVD ROM The Lens Cleaner uses eight staggered brushes that progressively pass over the laser lens to clean the entire surface. The cleaning process takes only a fraction of a second and can actually prolong the life of your disc player. Allsop even included easy-to-use voice instructions on the disc, so you know when it's done. Allsop Allsop, Inc Electronic Equipment Lens Cleaner Optical Disc Player Optical Drive VCR www.allsop.com
Disc/laser lens clnr kit DVD/CD disc/Laser lens cleaning kit Brand #: Audiovox Accessories VH1106N UPC: 044476061301 Keywords: disc laser lens clnr kit video cleaner cd dvd
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300mw red laser
Should I get contact lens?
my eye doctor did not talk to me if contact lens are good or not. should i get contact lens even if i fear putting in eyes and removing and do not know the process. can you tell me what to do? and is it possible to go straight from glasses to laser eye surgery instead? it is a lot of money and how to pay for it? no jokes and thank you
Contacts are not a big deal. I would not be scared of them. If you have an easy prescription, like near of far sightedness, they will be fairly inexpensive. If you have astigmatism, the price has come down a lot in recent years, but they will be more expensive and more of nuisance (they need to sit a certain way in your eye, so if you lie on your side, they will rotate the wrong way and blur your vision).
In the long run, laser surgery is probably a better alternative. Laser surgery is expensive, but less expensive than contacts over the long run. Laser surgery has the advantage that you don't have to deal with contacts and you can see when you wake up or when you go swimming (this is really cool for a glasses/contact wearer). There are risks with surgery, if something goes wrong you can have bad consequences. But if you find a good doctor (and make sure you check the credentials!) the risk is low. In fact, there are studies that show the risk of wearing contacts for a decade or two is greater than the risks of the surgery! You can definitely go straight from glasses to contacts (if you are old enough, which depends on your eyes, but if you are in your 20's your probably good).
If I were you, I would probably go straight for the surgery. There are some drawbacks, like dry eyes and poor night vision associated with surgery. And you will probably have these issues. When I got my surgery, I was a bit annoyed by these, but in time they reduce, and it was not long before I realized they were better than the problems I was having with contacts. But if you never try contacts, you will not realize how much better the laser is than the contacts, and you may be upset with the results of the laser. Let me say loud and clear, the best vision and lowest eye problems you will ever have, you will get with glasses. You don't get contacts to get better vision or fewer eye issues (eye strain, etc). The good thing about contacts is that you can always go back to glasses if you want to. With the surgery, if you don't like the results, you can't ever go back. So if that is a concern, go with contacts. Having done all three, I'm glad I did the surgery. I deal with dry eyes and sometimes I have poor night vision. But I think in general, my eyes feel better, my night vision is no worse, and my general vision is about the same as it was with contacts. And I have the benefit of never needing to worry about contacts falling out or putting glasses on or stuff like that.
If you are interested in surgery, make sure you find the right doctor. Make sure you find a doctor who is willing to sit down with you and discuss all the risks. And make sure your doctor is not pressuring you into making a decision. There are some major risks and you need to understand them fully. Surgery is not right for everyone, and should not be taken lightly.
Also, if you decide to get surgery, make sure to ask about PRK as a LASIK alternative. PRK usually takes longer to heal and is more painful. But PRK has fewer risk and generally better results. And with PRK, there is no risk of your eye flap coming loose in the future. With LASIK, the eye flap can come loose years in the future. Your doctor should be able to explain all the differences.
