User talk:Ilikefood
Battery
[edit]You edited the Battery article and added 'In addition, in the two-book series "Sneaky Uses for Everyday Things", there are instructions to make a battery from a nickel, a penny, and a piece of paper towel dipped in salt water.' Do you know if the instructions are in each book, or if not which book they are in? I would like to add this as a reference via a footnote, and put the description toward the beginning of the paragraph. I don't want to reference the first book and have someone disappointed not to find it there. Thanks ! Edison 03:40, 29 September 2006 (UTC)
In doing science projects/demonstration for kids, I like to make sure that they work, having seen teachers attempt to demonstrate some effect and failing miserably, leaving the kids thinking science is a big disappointment. Science boks are full of experiments that generally don't work in the sense of providing an effect that can be seen, felt, heard, etc. It is no problem if it does not at first succeed, since a little effort and experimenting, and trying different approaches, is good preparation fo all lab work, or for science or engineering careers. That said, I once use strips of copper (from roofing material scrap) and zinc (from old ignition cell batteries, the 6" tall ones no longer made), with a pickle as the middle. I had tried all sorts of electrolyte, until I found dill pickles, sliced thinly lengthwise, to be good because they gave the large surface area needed to lower internal resistance and increase output current. Many science projects try to use a potato battery to drive a load which requires more current than it can deliver. A fix is to connect an electrolytic capacitor across the battery. The size must be large enough to drive the load long enough to make an impression: light a light, ring a bell, make a spark via a transformer, or spin a motor briefly. A digital voltmeteer connected across the capacitor provides a buildup to hold the interest of spectators, then a switch closure or pushbutton connects the load to the battery/cap parallel combination. A pile of coins with the saline paper could make any desired voltage and provide even a dangerous amount of current, if they had a cap of proper voltage rating and capacity connected in parallel. Too large a cap would be boring, with slow charging. Edison 18:39, 29 September 2006 (UTC)
AAAA battery
[edit]Ok, i put a pic up on AAAA Battery for you. Hollowman512 16:15, 30 September 2006 (UTC)
I'm sorry. I thought it was some sort of prank and the article also sounds like a neologism which, in most cases, does not have a place in Wikipedia. Can you explain how it is notable in any way? (Who coined the term? Is this term in the dictionary? How many people use it?) If you have problem with my decision you are welcome to place {{hangon}} onto the article and expand further. mirageinred 18:35, 1 October 2006 (UTC)
Hi mate thanks for the thanks! You see I have compiled a List of villages and municipalities in Slovakia and am going thorugh each region bit by bit. I am also starting articles on all olympic medal winners e.g Leon Moreaux which was on the main did you know? yesterday! and going through films and actors e.g William Garwood. I also started Inner Mongolia Museum and did Tashilhunpo Monastery and Shalu Monastery ages ago. Its just people don't seem to notice!! Have a read of them tell me what you think. Ernst Stavro Blofeld 19:51, 1 October 2006 (UTC)
Please use edit summaries
[edit]I have noted that you often edit without an edit summary. Please do your best to always fill in the summary field. This is considered an important guideline in Wikipedia. Even a short summary is better than no summary. As you can see from the edit summary tool, you aren't using them very often. Thanks for understanding, and happy editing. Picaroon9288 20:56, 1 October 2006 (UTC)
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Capacitance VS. Voltage What's better for a capacitor if I want to create a coilgun? High Capacitance or High Voltage? Thanks. Ilikefood 22:00, 18 October 2006 (UTC)
First, CAUTION! Don't work with electricity or stored energy devices, or projectile devices unless you are qualified to do so, and understand and observe all applicable safety rules and precautions and laws. Large amounts of stored energy in any form is inherently dangerous. Electricity from capacitors can cause burns, or even electrocution. Caps can explode if reverse polarized, overcharged subject to excess high voltage, or discharged at too high a rate. High speed projectiles are as dangerous as a bullet. Even the energy in a photoflash can be lethal, since it is at a high voltage (way higher than the battery powering the device) and of sufficinet quantity to stop your heart, just as the "paddles" on ER shows are used to stop or defibrillate hearts.
I would expect a goal would be to achieve the rapid transfer of a large amount of energy from the caps to the coils. Energy of projectile=1/2* m* (v squared) in Joules = integral of current timesvoltage from stored energy, allowing for losses and efficiency. Not all caps are built for high current discharge and they all certainly have voltage limits which must be observed with a large safety factor. From Capacitor Energy stored = 1/2* capacitance*(voltage squared). Twice the capacitance at the same voltage stores twice the energy. It would cost about twice as much, since two caps in parallel doubles the capacitance. Twice the voltage in the same capacitance stores 4 times the energy. But it is more expensive to buy a higher voltage capacitor of the same Farad rating. If a device needs a certain amount of energy delivered in a given (short) time, you can price out the higher cost of better insulation for high voltage and the price of the high voltage capacitors, versus the high cost of more low voltage capacitors. Caps in series to get a higher voltage rating doesn't work well because the voltage divides unevenly according to the internal dc resistance of the caps. It's an engineering exercise. I'm not sure how you would easily measure the internal resistance of a cap to see its max discharge rate, or where the allowable safe discharge rate is specified. I doubt that caps made for general purposes like electronics or motor starting or power factor correction would work well. Again be cautious.Edison 22:24, 18 October 2006 (UTC)
Retrieved from "http://en.wikipedia.org/wiki/User_talk:Edison"
Man, that would make such a great science fair project! Thanks! Ilikefood 21:54, 9 November 2006 (UTC)
Well said
[edit]"Well, in all seriousness, the best way to stop people from writing timewasting questions is to tell you not to." Well Done.martianlostinspace 16:31, 18 December 2006 (UTC)
What's the policy on them plonkers? Do they just get blocked, messages deleted, told to go and bugger off or are ignored?martianlostinspace 19:52, 18 December 2006 (UTC)
Happy holidays !
[edit]You may want to consider endorsing this petition: User_talk:Friday#Petition_to_recall_User:Friday_from_the_position_of_admin. StuRat 12:07, 24 December 2006 (UTC)
Merry Christmas!
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- Merry Christmas and Happy Holidays Ilikefood! | AndonicO Talk | Sign Here 01:04, 15 December 2006 (UTC)
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May you and your family have a Merry Christmas, as well as any other Holiday you may celebrate. I hope that warmth, good cheer, and love surround you during these special days. May God bless you during the Holidays. | AndonicO Talk | Sign Here 01:04, 15 December 2006 (UTC) | File:Julekort.jpg |
Thanks! By the way, I used to have that practical joke too. :-) | AndonicO Talk | Sign Here 20:42, 25 December 2006 (UTC)
I don't see the counter; too bad. :-( | AndonicO Talk | Sign Here 20:46, 25 December 2006 (UTC)
Oh, I read wrong, sorry. I thought you said there was one. By the way, I just fell for your joke again right now, twice! (once on the user page, the other the talk page.) :-O :-) | AndonicO Talk | Sign Here 20:52, 25 December 2006 (UTC)
And the one before, making it three. :-) | AndonicO Talk | Sign Here 21:00, 25 December 2006 (UTC)
I never did stop falling for it, until I removed it that is. :-) | AndonicO Talk | Sign Here 21:06, 25 December 2006 (UTC)
Oh, no! I didn't take those! I took these are my pictures; hardly something to be proud of. | AndonicO Talk | Sign Here 21:10, 25 December 2006 (UTC)
Yes, they are. The flowers and the desert are the best, although I might be a little biased on the desert. :-) | AndonicO Talk | Sign Here 21:14, 25 December 2006 (UTC)
Xenon flash
[edit]Thank you for your contributions to the Xenon flash lamp article. They were very useful, and one of the references you provided gives some good info on spectral output data which will help me expand that section. I am working on adding a section on safety and hazards, which may be more appropriate for at least one of your edits. Although having the arc in contact with the glass can vaporize large amounts of material, releasing oxygen, cracking is usually caused by thermal gradients in the glass, and explosion is usually caused by the sonic shockwave. I imagine putting 75 joules through a small camera flashtube would either blow it up, or vaporize it completely, depending on flash duration. (With such high current and low voltage, I'd guess vaporized.) At very short durations, I've had flashtubes 3/4 of an inch in diameter and over a foot long, (similar to the one pictured in the article), blow up with enough force to stick glass in a wall 10 feet away, and a sound like a high powered rifle, at only 80 joules.
To help you out with safety, here's a simplified formula to figure out the "explosion energy" of a flashlamp, (the energy that will destroy it in 1 or 2 flashes). Take 3.5 joules x the arc length, (in millimeters), x the ID, (also in millimeters). This will give you the explosion energy for quartz, for a 1 millisecond flash. (For other glass types, cut that number in half.) Then, times that by the square root of the flash duration, (in milliseconds). This will give you the explosion energy. For safety and long life, Perkin Elmer recommends using only 30% of that.
A small camera flashtube, 1mm x 10mm, has an explosion energy of 35 joules, if quartz, (17.5 joules if not), for a 1 millisecond flash. Explosion energy for a 1 microsecond discharge is 1.1 joules, for quartz, and 30% of that is .33 joules. I hope that helps. Thanks again for your contributions, and be safe. Zaereth (talk) 19:43, 3 December 2008 (UTC)
BTW, using such high current and low voltage would produce an extremely dense arc, causing much of the internal radiation to be absorbed before reaching the surface, (hence the name blackbody radiation), which can severely impare output efficiency. Also, the above calculations are approximate, better for slightly to much larger lamps with a pressure at or near 450 Torr, (around -8 PSI). Very small lamps often have a pressure as high as 1000 to 3000 Torr, (or from +20 to 60 PSI). This is negligible, however, as pressure has a big effect on impedence, but rather little on explosion energy.Zaereth (talk) 23:28, 3 December 2008 (UTC)
- No problem. Isn't destructive testing fun! I just hope you're wearing your safety glasses and ear protection, and keep well away from the blast zone.
- I was mistaken. High current would equal high heat. Voltage tends to produce the sonic concussive force, so that would explain the cracking of the glass, and the relatively low force of the explosion.
- It might be helpful to add a full paragraph in the article on the circuit you're describing there. The circuit is often called a "Variable Pulse Width Control" circuit, as is described in the Perkin Elmer catalog which I referenced. There are many ways to put one together, and can even be designed to produce square-wave pulses. Perhaps if we start out with the name, then a small paragraph to describe the circuit that would fit better with the style of the rest of the article. What do you think? Zaereth (talk) 23:43, 4 December 2008 (UTC)
Notification of automated file description generation
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Quixotic plea
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You are invited to join the discussion at Wikipedia talk:Wikipediholism test. Thanks. — {{U|Technical 13}} (e • t • c) 06:28, 23 May 2015 (UTC)
AfC notification: Draft:Phil Kafarakis has a new comment
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@I dream of horses: Thanks for your comment! I have added a suggestion of the three sources to review on the article's talk page as requested. --Ilikefood (talk) 02:05, 3 May 2019 (UTC)
Your submission at Articles for creation: Phil Kafarakis (September 25)
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Hello, Ilikefood!
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NYC
[edit]Hi there,
Saw you added a picture to the Community Bookstore article. Thanks! Assuming you're in the area, have you seen Wikipedia:Meetup/NYC? We have lots of Wikipedia events in NYC throughout the year, but March is perhaps our busiest month. Happy to say more about it if you have questions. — Rhododendrites talk \\ 01:01, 2 March 2020 (UTC)
- @Rhododendrites: Hi Rhododendrites! I'd love to get more involved with the community by visiting a meetup, though I'll have to hold off for the time being due to the pandemic and all that. Thanks for inviting me! Ilikefood (talk)
- Sounds good. Yes, we've actually canceled all in-person events until it seems safer. In the meantime, we had our first online WikiWednesday meeting this week. If you want to be notified with a talk page message when there are upcoming events, you can add your name to this list. — Rhododendrites talk \\ 03:10, 22 March 2020 (UTC)
Your draft article, Draft:Phil Kafarakis
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Hello, Ilikefood. It has been over six months since you last edited the Articles for Creation submission or Draft page you started, "Phil Kafarakis".
In accordance with our policy that Wikipedia is not for the indefinite hosting of material deemed unsuitable for the encyclopedia mainspace, the draft has been deleted. If you plan on working on it further and you wish to retrieve it, you can request its undeletion by following the instructions at this link. An administrator will, in most cases, restore the submission so you can continue to work on it.
Thanks for your submission to Wikipedia, and happy editing. Liz Read! Talk! 13:35, 31 October 2020 (UTC)
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