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Boba Rhett
02-15-2007, 02:28 AM
My particular forte is electricity so the first batch will be about, you guessed it, electricity!


http://olivetinstitute.org/stuff/emot-science.gif Static electricity shocks can be well over 10,000 volts.

Jump distance information: (through your average air sample)

mm gap - volts required
.5______________2850
1_______________4350
2_______________7350
3______________10350
4______________13350
5______________16350




http://olivetinstitute.org/stuff/emot-science.gif Want a stun gun in under five minutes?

Step 0: Yes, step zero. For the love of God, discharge the flash on your camera.

Step 1: Crack open a disposable camera, see the big black cylinder in there that looks like the one in this (http://www.geocities.com/lemagicien_2000/elecpage/maxflash/max04.jpg) picture? It's a capacitor. Jumper two insulated wires (works best if you solder them but wrapping will work), one from each of its legs, and run them outside of the case. Then reassemble the body of the camera. Do NOT let the ends of the wires touch.

Step 2: Press and hold the flash button until the flash is fully charged.

Step 3: RELEASE THE FLASH CHARGE BUTTON.

Step 4: Find something (non living) to shock the hell out of.

NOTES:

Despite my seemingly wanton disregard for human life in telling you to do this, I will tell you this - it is not a toy. It's strong enough to blow craters in quarters - it's strong enough to mess you up.

The discharge will be along the line of 340 volts.

If the flash button is not released the battery of the camera will immediately drain during your first tazering.

The camera should be good for about 300 tazer discharges.

While this won't be killing anyone or knocking them to the ground anytime soon, this can hurt VERY BADLY. NEVER use this on living things. Even if you're in a violent, mouth-frothing, fit of rage. *points at BongoBob* :carms:




http://olivetinstitute.org/stuff/emot-science.gif The subsequent hole I blew in my thumb from forgetting to discharge the flash on the first incarnation of the aforementioned stun gun hurt very badly. So, how much power did it take for me to loose feeling in my thumb for three days? Lets find out! :haw:

My capacitor was charging to 343 volts. measuring the resistance across the distance it had to move across my skin gives us the figure of about 730,000 Ohms which then gives us a current of about 470uA. Voltage * Current gives us ~.161 Watts. BONUS: That's .000216 Horsepower!




http://olivetinstitute.org/stuff/emot-science.gif If you maintain an electric field through water somewhere on the order of 1 million volts per cubic meter, the water will freeze at room temperature.




http://olivetinstitute.org/stuff/emot-science.gifThe average sized Tesla Coil, Click Me (http://members.iinet.net.au/~pterren/Tesla_8ft.JPG), produces 2.5 million volts at 20,000 Amps. A bolt of lightning can reach 300,000,000 volts at 30,000 Amps, Click Me (http://a52.g.akamaitech.net/f/52/827/1d/www.space.com/amazingimages/images/Picture018_wm_cte.jpg).




http://olivetinstitute.org/stuff/emot-science.gif How fast is "electricity"? The speed of light, 186,000 miles per second you say? The shockwave" moves at that speed but the actual electron flow could easily be outpaced by a man in a walker going uphill.




http://olivetinstitute.org/stuff/emot-science.gif Electricity flows from positive to negative, right? Nope! Negative to positive. Electrons are negatively charged, which causes them to moves from negative to positive. The flow looks like it's going from positive to negative because of the "holes" left by the electrons as they move. (You're seeing the holes and it looks like they're moving positive to negative)




http://olivetinstitute.org/stuff/emot-science.gif What's one of the best electrical insulators? Pure water. Very very pure. The impurities in normal water are what causes it to be such a fantastically lethal conductor. (The electricity is given a path through the impurities)


And that's all I can remember for now. Feel free to post comments, questions, to supply additional stuff, or just to call me a lying bastard or some other generic form of bastard. :wavey:

Ray Jones
02-15-2007, 02:59 AM
Hey, you've missed out to actually explain why things are like that. For instance, why is pure water one of the best insulators? Why is the direction of electric current flow from negative to positive?

Boba Rhett
02-15-2007, 03:03 AM
What am I, your mother? :xp:





fixed!

Ray Jones
02-15-2007, 03:43 AM
Electrons have negative charge. To make them "flow" you need a difference of charge between the electrodes (potential difference). This potential (to produce electric current) is measured in Volt. Now, the cathode (-) has more electrons than the anode (+), and basically the electrons just want to go where it's less crowded than where the currently are, so they take a nice walk to a new land. This is then called current and measured in Ampere, the more electrons are walking at the same time the higher is the current. This theoretically happens until all electrons are equally "distributed" (Or in Rhett's example until his thumb turned into coal, next time the ear, eh). This can be compared to the water flowing out of a glass which is knocked over. BTW, it's not the voltage which is dangerous, but the current which flows. One can easily get killed with a voltage of 10V if there's enough current flow.

Mother.

jebbers
02-15-2007, 04:12 AM
Hey I just made a video with static electricity. It's another form of electricity.

http://www.youtube.com/watch?v=2DwIoBHDSPM

BongoBob
02-15-2007, 09:15 AM
Rhett you misspelled my name...

I'LL F***IN KILL YOU!!!

*foams at the mouth*

:xp:

Ray Jones
02-15-2007, 09:53 AM
It's not the water itself that's conducting electricity. It's all the crap that's in it that's conducting it.That crap is called "ions". Positive and negative charged ions to be more specific. Basically, throw some salt in to get it conductive.

grievous797
02-15-2007, 10:07 AM
Whoo hoo! Science class! Yes I am a nerd.

Ray Jones
02-15-2007, 10:18 AM
So far you have yet to add knowledge. :dozey:

grievous797
02-15-2007, 10:40 AM
Nah, I know alot of science.

Ray Jones
02-15-2007, 10:57 AM
Go right ahead. What's a Triple point?

IG-64
02-15-2007, 11:21 AM
Nifty. :thumbsup:

Now tell me, when I get off of my trampoline and touch the metal bar on the edge (something I quickly stopped doing) why is the static charge so powerful? And could it become powerful enough to actually do any harm?

rozo100
02-15-2007, 11:44 AM
yeah, that trampoline zappyness HURTS! i just learned to jump off the trampoline, (i twisted my ankles soooo many times!) oh yeah and its definatly not fun to be rolling aroundon the trampoline an roll onto the springs when you are all zappy.(especeally if you are a boy....)

grievous797
02-15-2007, 12:02 PM
Go right ahead. What's a Triple point?
A triple point is the temperature a object reaches the pressure-temperature plane.

Boba Rhett
02-15-2007, 12:57 PM
Sorry for not elaborating, Ray. You did a wicked awesome job explaining them though! :)

Ray Jones
02-15-2007, 01:31 PM
A triple point is the temperature a object reaches the pressure-temperature plane.
This ain't enough, I'm afraid. What would a pressure-temperature plane be?

grievous797
02-15-2007, 01:46 PM
Pressure (P), Volume (V), and Temperature (T) are related for gases by the Ideal Gas Law. As temperature increases, the pressure and/or volume of the gas will increase. As temperature decreases, the pressure and/or volume of the gas will decrease. Most solids and liquids also expand as their temperature increases. That should explain it.

Ray Jones
02-15-2007, 01:56 PM
Nope. That's rather displaying some relations between temperature/pressure/volume/dense of an element/substance, but does not contain info of what a triple point is. Although the triple point is directly related to pressure, temperature etc. Oh, and it does not explain what a temperature-pressure plane would be.. Another try? :)

grievous797
02-15-2007, 01:57 PM
Gimmie another question... If your not afraid :D

jebbers
02-15-2007, 02:05 PM
Earth Science and Biology were my strong suits. I only passed Chemistry because our teacher never covered the posters on the walls. So the answers were always to my left and right.

Ray Jones
02-15-2007, 02:05 PM
Okay, but first the triple point: the triple point of a substance is the "combination" of temperature and pressure which causes all three phases (solid, liquid, gas - hence triple point) of that substance to exist at the same time.

Hm. If I drop a feather and a 1 ton block of iron in a room with a vacuum from a height of let's say 100 meters, which of both objects hits the ground at first?

grievous797
02-15-2007, 02:10 PM
both will hit at the same time

Ray Jones
02-15-2007, 02:11 PM
Why?

grievous797
02-15-2007, 02:12 PM
Look I cant explain it I just know it.

Samuel Dravis
02-15-2007, 02:25 PM
They'll hit at the same time (or very close anyway) because there's no air resistance and gravity attracts them both equally. Why? I've no idea why gravity works that way.

grievous797
02-15-2007, 02:28 PM
They'll hit at the same time (or very close anyway) because there's no air resistance and gravity attracts them both equally. Why? I've no idea why it works that way.
Suck up.

Ray Jones
02-15-2007, 02:28 PM
Knowing the answer is okay, to know what's behind it is better. but that's why we're here, eh? :P

The explanation is quite simple: air resistance. :) The mass of iron block is pretty much err heavy, so the air (or any other gas) has not much to put against it, but the feather has a small mass, wind (air) can easily blow it away. But without any air/gas, what then? Both are pulled towards the ground with the same acceleration caused by earth gravity and nothing is trying to "stop" them. The mass is complete of no importance in this case. ;)

[edit]
ARRGH!! Not just close, equally. :P

Samuel Dravis
02-15-2007, 02:32 PM
ARRGH!! Not just close, equally. :PWell, I put close because I don't know what's outside the room or whether the sides of the room are completely uniform in density.

grievous797
02-15-2007, 02:41 PM
As I said before your a suck up.

jebbers
02-15-2007, 02:42 PM
My teacher put a marshmallow into a bell-jar vacuum once. Nothing happened cuz the bell-jar imploded. It was old.

Ray Jones
02-15-2007, 02:43 PM
Equally, because there's nothing but vacuum in the room. The rest is not of importance. :P

How does a refridgerator work?

grievous797
02-15-2007, 02:46 PM
Modern refrigerators don't use CFC. Instead they use ammonia gas. Ammonia gas turns into a liquid when it is cooled to -27 degrees Fahrenheit (-6.5 degrees Celsius).

A motor and compressor squeezes the ammonia gas. When it is compressed, a gas heats up as it is pressurized. When you pass the compressed gas through the coils on the back or bottom of a modern refrigerator, the hot ammonia gas can lose its heat to the air in the room.

Remember the law of thermodynamics.

As it cools, the ammonia gas can change into ammonia liquid because it is under a high pressure.

The ammonia liquid flows through what's called an expansion valve, a tiny small hole that the liquid has to squeeze through. Between the valve and the compressor, there is a low-pressure area because the compressor is pulling the ammonia gas out of that side.

When the liquid ammonia hits a low pressure area it boils and changes into a gas. This is called vaporizing.

The coils then go through the freezer and regular part of the refrigerator where the colder ammonia in the coil pulls the heat out of the compartments. This makes the inside of the freezer and entire refrigerator cold.

The compressor sucks up the cold ammonia gas, and the gas goes back through the same process over and over.

Here ya go!

Ray Jones
02-15-2007, 02:48 PM
That appears to be how copy&paste works, too! :haw:

grievous797
02-15-2007, 02:49 PM
Wait a sec... Your a psycho...I mean psychic

Ray Jones
02-15-2007, 03:09 PM
That, and I can read dem timestamps of ter posts, too! X)

[edit]

As we all know, giraffes love to eat acacia trees. How comes that, when they find a wood of acacia trees and eat there, they just eat from roundabout every 10th tree?

BongoBob
02-15-2007, 04:58 PM
Magic.

Boba Rhett
02-15-2007, 06:36 PM
Thanks for violently spraying the verbal diarrhea all over my thread, guys. It's much appreciated.

MTV2
02-15-2007, 06:47 PM
static electricity is Lightning, so static electricity can be way more then 10,000 volts

Rogue15
02-15-2007, 07:01 PM
hahahaha yeah i knew that about the camera, i work at a photo lab...my first week i kept getting 74z0r3d...

Agen
02-15-2007, 07:23 PM
And on a completely different note, let's talk about Time Dilation (http://en.wikipedia.org/wiki/Time_dilation). :D

How awesome.

DarthAve
02-15-2007, 07:56 PM
How can there be science discussion without these two major things.

1. http://www.avonworth.k12.pa.us/spointek/images/BILL%20NYE.jpg

2. Molecular Gastronomy (http://en.wikipedia.org/wiki/Molecular_gastronomy)

Boba Rhett
02-15-2007, 09:07 PM
static electricity is Lightning, so static electricity can be way more then 10,000 volts

As stated, "Can be well over 10,000 volts". But thank you for pointing out that static electricity is , indeed, electricity. http://olivetinstitute.org/stuff/emot-pseudo.gif I was somewhat hazy on the issue. ;)


Why hasn't molecular gastronomy been used yet to make flatulence smell of roses and mint? I want answers!


http://olivetinstitute.org/stuff/emot-science.gif Plasma balls (like the ones in Spencer's Gifts, etc.) are miniature Tesla Coils. I believe these operate by means of electrical conduction. An AC current is injected into the ground through a grounding terminal, this takes advantage of the earths charge - making it oscillate and enabling an electrical flow to propagate thousands of miles with little interference. (Think about it, relative to it's size the earth isn't exactly thin anywhere so it's not going to choke the flow) This propagation is the reason the flow from the Tesla coils can be completed from the coil through the earth to you and back to the coil. The tentacles reaching to your hands and the small shock you feel are the surface waves. This is the current jumping through the air to complete the huge flow that's been set up.

Edit: I think I'm wrong on this and that the tendrils are actually just a result of the secondary coil trying to equalize the voltage difference between itself and any conductive material within its ionization bubble.

BongoBob
02-15-2007, 10:33 PM
Man, every time someone says Tesla coil all I can think of is Command and Conquer Red Alert :p

TiE23
02-15-2007, 11:01 PM
We got to use Zinc and Hydrochloric acid to create Hydrogen gas and store them in jars. Then everyone in the class got to light the gas as it escaped creating flashing fireballs about the size of balloons. Lots of fun. : P

DarthAve
02-16-2007, 12:32 AM
Why hasn't molecular gastronomy been used yet to make flatulence smell of roses and mint? I want answers!
Because

A) "Roses really smell like poo poo poo. yeeeaahh roses really smell like poo poo poo" So there isn't much work to be done
B) This really has more to do with anatomey science than food science.
C) Wiley Dufresne is busy being a guest host on the Top Chef finale last month, Grant Achatz is to bust being sexy, and Marcel Vigneron is to busy being sexier than Grant Achatz and working at Joel Rubochon or however his name's spelled.

jebbers
02-16-2007, 12:38 AM
Because

A) "Roses really smell like poo poo poo. yeeeaahh roses really smell like poo poo poo" So there isn't much work to be done


what song is that from? i hear my sister say that quite often.

milo
02-16-2007, 12:57 AM
How can there be science discussion without these two major things.

1. http://www.avonworth.k12.pa.us/spointek/images/BILL%20NYE.jpg
[/url]
I thought he died.

Boba Rhett
02-16-2007, 01:09 AM
Outkast - Roses.


http://olivetinstitute.org/stuff/emot-science.gif Current actually travels on the magnetic field surrounding wire, not through the wire itself.

http://olivetinstitute.org/stuff/emot-science.gif The microwave was invented after a researcher walked in front of a radar tube and a chocolate bar melted in his pocket.


How come Beakman doesn't get the same respect Nuy does? :(

BongoBob
02-16-2007, 01:56 AM
Rhett, be honest, you just made this thread because you love that smiley.

Boba Rhett
02-16-2007, 01:58 AM
It was a deciding factor, yes.


http://olivetinstitute.org/stuff/emot-science.gif

Ray Jones
02-16-2007, 02:42 AM
How ultimate. I would have done the same.

TiE23
02-16-2007, 04:01 AM
I really can't decide what this thread is about, so I'm going to post this:

http://freesound.iua.upf.edu/index.php
You'll need an account to download, but it's simple if you don't mind clicking a link in an email.

It's like porn for your ears. Search around for binaural, crowd, ambient, etc. I dunno about you guys but I'm putting some of this on my Zen and going to sleep with this. Make sure you have Audacity, they use some abscure lossless audio file formats there.

DarthAve
02-16-2007, 04:09 PM
I thought he died.
Bill Nye will never die. He's immortal due to all the damn videos of him I've seen. I've seen the one on volcano's 3 times, and I love it.

Samuel Dravis
02-18-2007, 01:29 PM
Hey Rhettski, I have a real question!

I've got a gas furnace that is not turning on properly. The solenoid switch in the gas line usually usually turns off when activated by a 750mV thermocouple. My problem is I don't know if the thermocouple is being able to provide enough power to throw the switch; something might have broke inside the switch or the thermocouple. I don't want to put more than the usual amount of power onto the switch because I don't want to blow it out, so I'm trying to step down a 1.5v AA battery to 750mV in order to be sure the right amount of power is reaching the switch.

The catch is I don't know how to step down the power of the battery to do it. I have a mini electronics kit with a bunch of resistors, a meter and a control knob in it, but I'm not sure about how to get the resistors to take off half of the voltage so that the meter displays the maximum at 750mV. Hopefully I will be able to connect the meter and control knob as well so I can change the flow and see when the solenoid switch flips.

Here's a pic of the electronics kit (http://img19.imageshack.us/img19/1030/dscf5912re5.jpg) with the resistors on the upper left, and here's one from front control panel (http://img19.imageshack.us/img19/4176/dscf5913fy4.jpg).

Any ideas?

BongoBob
02-18-2007, 02:04 PM
I believe that half those words in there were made up :p

Boba Rhett
02-19-2007, 02:34 AM
A gas line? You're a braver man than I am. :xp:

Off track: I loved those kits! That brings back great memories.

The easiest and safest thing to do here would be to test to see if the thermocouple is working correctly. What's the make of the thermocouple? We'll need the make of it so we can look up its mV to Temperature chart (http://www.omega.com/prodinfo/thermocouplesensor.html). Then we can just pop it out, check the readings and see if it's putting out what it should be at room temperature.

You have a multimeter, please say yes? :)

If you're really dead set on trying to jerry rig power to a gas line (http://i.somethingawful.com/forumsystem/emoticons/emot-psyduck.gif), I guess you could get yourself 750mV by doing this with a AA battery and your resistors:

Samuel Dravis
02-19-2007, 04:15 AM
A gas line? You're a braver man than I am. :xp:Hehe Rhett, I'm not THAT stupid. All the parts are disconnected from any type of gas flow and sitting on a table. :D

The easiest and safest thing to do here would be to test to see if the thermocouple is working correctly. What's the make of the thermocouple? We'll need the make of it so we can look up its mV to Temperature chart (http://www.omega.com/prodinfo/thermocouplesensor.html). Then we can just pop it out, check the readings and see if it's putting out what it should be at room temperature.I'll try that tomorrow, thanks!

You have a multimeter, please say yes? :)Yes! :p

If you're really dead set on trying to jerry rig power to a gas line (http://i.somethingawful.com/forumsystem/emoticons/emot-psyduck.gif), I guess you could get yourself 750mV by doing this with a AA battery and your resistors:Thanks, and yes I'm DEAD SET on doing it. :D