BPHgravity

A better formula to use would be P=I^2xR. When voltage is constant, resistance must be reduced for current to increase. As resistance is lowered, current and power goes up, and so will temperature. So your relationship statment of as R goes down so will T is not correct. I would just do a simple power to temperature graph, using 25-watt, 40-watt, 60-watt, 75-watt, and 100-watt lamps. I would range the temperature from 100 degrees F. to upwards of 500 degrees F with 50 degree intervals. Lamp position must be kept constant for all samples as the surface temperature of the bulb changes with change in orientation of the lamp. The best test position would be bulb up and base down. You will receive maximum temperatures this way at the glass. I would start my plotting a five minutes on time for each lamp. Good Luck.

Cheese...., Yum!

Use an IR thermometer. These are non-contact devices that are extremely accurate. http://www.toolsource.com/ost//product.asp?brand_id=&sourceid=googleraytek&dept_id=500&pf_id=92165&mscssid=6FKAP1S6CNMG8NVDD1DB7NM35BUJ9DC7

Well, it would be alot easier to explain if you had numbered your resistors. I'll give it a shot though. The best way to solve these type of circuits is to first determine what is in parallel and what is in series. Going from left to right, you have 2, 10-ohm resistors in series with each other and are both in parallel with 1, 10-ohm resistor. These three are in series with 1, 10-ohm resistor which is in parrallel with 3 more 10-ohm resistors in series with each other. The 2, 10-ohm in series are added to make 1, 20-ohm resistor, and the other three in series make 1, 30-ohm resistor. The new simplified circuit consists of a 20-ohm in parallel with a 10-ohm, which are in series with a 10-ohm in parallel with a 30-ohm. Using the product over sum method, the parallel resistors can be solved. 20x10/20+10=6.67-ohms, and 10x30/10+30=7.5-ohms. Now all you have left is a 6.67-ohm in series with a 7.5-ohm which can be added to equal the 14-ohms. Make any sense?

Can you describe the experiment in more detail? I am interested in what you are trying to learn. Thanks!

Answer: 14.16-ohms

Some collectors like coins to be clean and free from tarnish. Others feel they should not be touched and the "patina" left alone. Removing tarnish from silver does take a slight amount of the silver with it, so I imagine the same goes for copper and copper alloys.

Tycho, I don't mean to be rude or insulting, but you obviously have a limited electrical background. Even something as small as a penny is going to require thousands of amperes at relatively high voltages. The type of materials and equipment to produce this is dangerous and complicated. There is nothing wrong with experimenting with electrical energy, but only after extensive safety training and basic theory has been understood. There are many experiments that can be done to show the same principles as a rail gun, and will also provide you with the experience and training to work into larger projects. All I'm saying is walk before you run. Try the Gauss Gun from my link, its lots of fun and very educational. Then buy yourself a basic electrical lab and go from there. Good luck!

I love those "What if Reality Shows." Every year here in Florida the local TV station broadcasts a simulated, yet realistic scenario of a hurricane hitting our coast straight on. Pretty much everything blows away, floods, and lots of people die. My particular neighborhood would be in about 20 feet of water from a weak category 3 storm of 125 mph winds. That might not be so bad, water front property is quite valuable!!

Have you considered making a "Gauss Rifle?" The principles are the same except you don't have to worry about producing electrical energy. Its fun to build and use, plus it would be easy to use as a model of an electromagnetic system. Check one out here: http://www.scitoys.com/scitoys/scitoys/magnets/gauss.html

Huh? I don't think so. The piezoelectric effect causes some materials to become electrically polarized when they are mechanically strained. Applying electrical currents to a piezoelectric crystalline substance won't induce pressure or change? I do recall reading about some sort of mineral laden gelly substance that "quivered" when elctrical currents were applied. I don't know what ever came of it.

I am being serious. The accomplishment would be brillant and fantastic. You could change the world. Since you didn't like my first suggestion, I feel I should come up with another to make up for it. How about you re-invent the wheel, or maybe build a better mouse trap? I think alternative energy is the next big thing, kind of is now. There is alot of energy on this planet we aren't using. Dinosaur fuels need to go.

Its not the conductors that buzz, its the connections at the terminations that do. Current causes an annealing effect at terminations that may eventually cause vibration. In most cases, the buzz you are hearing is from fluorescent luminaire transformers.

Build a machine that produces more energy than it consumes.

I do not know of any material exhibiting this phenomenon produced by electrical current alone, however, there is positive thermal expansion effects due to heat from electrical current.

Red Rum! Red Rum!

A good strong acid and lots of heat?

Reverse Osmosis.

This is too easy! Here in SouthWest Florida, the sweat boils off my forehead just going from the house to my vehicle. I'm going to use on of those huge metallic-foil sun blockers for car windshields. Not only am I going to catch the hotdog on fire, but Im pretty sure it will burn a hole in the upper atmosphere!

I don't know if you would call this "musical hallucinations," but certain songs invoke certain smells when I here them. I'm not talking about remembering a odor or recalling a situtation involving odor, I actually mean smell, as if the object was right in front of my face. This usually invoves a song from my childhood and the smell of a specific type of food. The specific smell is always assoicated with the same song. It can be quite powerful to the point I nearly think I can taste the food. It may sound weird, but it actually quite pleasing, and I wouldn't call it a defect.

What is the process/function that allows one to breathe? I imagine it must be some sort of muscular contraction, but that doesn't seem to explain how air can be taken in. Where does the exhaling and inhaling action get its power?

Those power "thingys" you see on the street are transformers. They "hum" due to the effect described by swansont. Same with the lightning. The sound I am questioning does not appear to have any physically explanation to its source. I can repeat the phenomenon at a lower scale in my lab. The larger the current flow, the louder the sound. I feel most people have learned to tune the sound out as it is a background noise heard since birth. I have worked with electrical systems for ten years and have begun to "sense" another component of its process. The effect can also be simulated on high potential, high frequency, and low current circuits. This tells me that it is not directly related to current, but more of a power issue. I do not have a strong enough engineering or theory background to explain this beyond my understanding of electricity, which is mostly application and installation of electrical systems. I plan on doing some Nikola Tesla research to determine if this effect was ever noticed or studied by him.

Have you ever noticed that when a large electrical system is shut down, a very loud clicking noise with a low frequency hum follows? I was recently at a baseball game when three separate banks of lights were shut down one after another. The noise was as I described above. Click-boom, Click-boom, Click-boom. Also, have you ever been asleep and wake up right at the moment the power goes out during a storm? In this example, it is almost like the sound of silence is greater than the sound of background noise. Is that possibly the same effect taking place in the question above? Can electricity make noise and sound?

Have you ever noticed that when an airplane propeller is accelerating, at some point the blades appear to begin spinning backwards from actual rotational direction. It then smooths out to a stop and then appears to be at full speed. The same effect can be seen on cars with fancy wheels. What exactly is going on here?

I believe you may be talking about "Gain-Assisted Superluminal Light Propagation." Follow this link to read about the experiment: http://www.neci.nec.com/homepages/lwan/demo.htm