my god, we better do that this year.doompenguin wrote:
We did this in Physics and the pencil caught fire, then exploded.
We thought it was so awesome we donated our own pencils to watch them blow up.
I know people who have been shocked by car batteries, so yes you can feel it.Freezer7Pro wrote:
CameronPoe wrote:
That is a hefty wad of current, 100 times more than enough to kill a man - and make absolute shit of a pencil I would imagine.Freezer7Pro wrote:
Why wouldn't I?AC. This is DC.wensleydale8 wrote:
isnt it something like 6milliA that will kill you?
An AA battery can discharge a good 1.5A, but you won't die from holding one. Same with a car battery, it can output a good kA, but you can still touch it without even feeling it. Your body simply has too high resistance.
i have personally witnessed a guy that got his wedding ring welded to a wrench, by a car battery....tell HIM he didnt feel it lol.CrazeD wrote:
I know people who have been shocked by car batteries, so yes you can feel it.Freezer7Pro wrote:
CameronPoe wrote:
That is a hefty wad of current, 100 times more than enough to kill a man - and make absolute shit of a pencil I would imagine.AC. This is DC.wensleydale8 wrote:
isnt it something like 6milliA that will kill you?
An AA battery can discharge a good 1.5A, but you won't die from holding one. Same with a car battery, it can output a good kA, but you can still touch it without even feeling it. Your body simply has too high resistance.
He's married with UPS's nowadaysliquidat0r wrote:
More to the point, why the hell to do you have 5 car batteries?
Last edited by DeathUnlimited (2008-12-03 14:46:58)
I didn't think the voltage of car batteries was high enough to pass through you.Parker wrote:
i have personally witnessed a guy that got his wedding ring welded to a wrench, by a car battery....tell HIM he didnt feel it lol.CrazeD wrote:
I know people who have been shocked by car batteries, so yes you can feel it.Freezer7Pro wrote:
AC. This is DC.CameronPoe wrote:
That is a hefty wad of current, 100 times more than enough to kill a man - and make absolute shit of a pencil I would imagine.
An AA battery can discharge a good 1.5A, but you won't die from holding one. Same with a car battery, it can output a good kA, but you can still touch it without even feeling it. Your body simply has too high resistance.
i dont think so either....i was standing a good 10-12 feet away.Sydney wrote:
I didn't think the voltage of car batteries was high enough to pass through you.Parker wrote:
i have personally witnessed a guy that got his wedding ring welded to a wrench, by a car battery....tell HIM he didnt feel it lol.CrazeD wrote:
I know people who have been shocked by car batteries, so yes you can feel it.
A car battery is 12V. If it outputs a kA, then that is dependent on your bodies resistance, and you die. It's not going to output a kA and you won't feel it. Rather, you may but only for a short time.Freezer wrote:
Same with a car battery, it can output a good kA, but you can still touch it without even feeling it.
Not if your skin is dry.Sydney wrote:
I didn't think the voltage of car batteries was high enough to pass through you.
Last edited by Defiance (2008-12-03 15:13:53)
It's really, really hard to get shocked by a car battery, unless you're wearing tin foil and have just been swimming in a salt solution. Even so, if your body would somehow short one out, you'd just die on the spot and not feel a thing.CrazeD wrote:
I know people who have been shocked by car batteries, so yes you can feel it.Freezer7Pro wrote:
CameronPoe wrote:
That is a hefty wad of current, 100 times more than enough to kill a man - and make absolute shit of a pencil I would imagine.Freezer7Pro wrote:
Why wouldn't I?AC. This is DC.wensleydale8 wrote:
isnt it something like 6milliA that will kill you?
An AA battery can discharge a good 1.5A, but you won't die from holding one. Same with a car battery, it can output a good kA, but you can still touch it without even feeling it. Your body simply has too high resistance.
<3DeathUnlimited wrote:
He's married with UPS's nowadaysliquidat0r wrote:
More to the point, why the hell to do you have 5 car batteries?
He must have put the wrench to one terminal and his ring to the other. To weld with 12V, you'll need around 7-10A minimum, and that isn't gonna pass through a body.Parker wrote:
i dont think so either....i was standing a good 10-12 feet away.Sydney wrote:
I didn't think the voltage of car batteries was high enough to pass through you.Parker wrote:
i have personally witnessed a guy that got his wedding ring welded to a wrench, by a car battery....tell HIM he didnt feel it lol.
First, I was just stating that a car battery can output a kA. The short-circuit amperage on my car batteries, which aren't the kind you usually find in cars (they're designed for providing a stable current for longer) are 800A a piece. As soon as you put any kind of resistance in between, that current is reduced to a fractal of the shorting current.Defiance wrote:
A car battery is 12V. If it outputs a kA, then that is dependent on your bodies resistance, and you die. It's not going to output a kA and you won't feel it. Rather, you may but only for a short time.Freezer wrote:
Same with a car battery, it can output a good kA, but you can still touch it without even feeling it.Not if your skin is dry.Sydney wrote:
I didn't think the voltage of car batteries was high enough to pass through you.
If you've just been swimming, you'll feel it.
If you've just been swimming in salt water, you'll feel it, maybe not for long.
Freezer, the point of using 'perfect world' physics is to remain accurate. If you measure the voltage of each battery and added them together to get 65, fair enough and better in fact. You can not, however, arbitrarily state that it's 65V because a well charged battery is (in your mind) 13V.
Also, AC does not kill in the same manner as DC. What it does is cause the muscles to contract, and at that point you're in a world of shit because of the persistent current going through you. As it causes the muscles to contract, the direction of current is also changing rapidly and when that effect is present on your heart it causes fibrillation. That kills you. From what I've read, it takes about a fifth of the DC 'kill' current to kill someone with AC.
In summary: Current is measured in Amperes, it's current that kills. Amperes are calculated in accordance to Volts and Ohms (As said, V=IR). Any amount of voltage can kill you if your resistance is low enough. Realistically, your body can floor around 300 Ohms. Worst case scenarios, lower. It's unlikely a car battery will kill you but it's not a stretch of the imagination for it to be possible.
That said, flaming pencils are cool.
Edit: Just remembered this fun situation from physics. Say you're standing around a grounded storm cable. Say lightning strikes and it releases charge in to the ground. Say your walking too/away from it and you're two feet are two different distances from the wire. The potential difference of charge from where one foot is to the next can cause a current adequate to kill someone. What the R required for this is, I don't remember but it's another 'special situation' things.
watFreezer7Pro wrote:
He must have put the wrench to one terminal and his ring to the other.
Same thing, the whole car is connected to - on the battery. The point I was trying to make is that it was the ring and wrench, not his body that were conducting. He wasn't conducting electricity or getting shocked, just burned.Parker wrote:
watFreezer7Pro wrote:
He must have put the wrench to one terminal and his ring to the other.
no, the frame in a car acts as a ground.
he was on the positive terminal with the wrench (the same hand that had the ring on it). the bolt on the terminal broke free and the wrench hit the frame.
BIG pop sound, and then he started screaming because he got the shit burned out of his hand when that shit welded together.
bad day for him.
not really.Freezer7Pro wrote:
Same thing
thanks for letting me know...Freezer7Pro wrote:
The point I was trying to make is that it was the ring and wrench, not his body that were conducting. He wasn't conducting electricity or getting shocked, just burned.
Parker wrote:
he got the shit burned out of his hand when that shit welded together.
I think you'll find he didn't get burned at all.Parker wrote:
not really.Freezer7Pro wrote:
Same thingthanks for letting me know...Freezer7Pro wrote:
The point I was trying to make is that it was the ring and wrench, not his body that were conducting. He wasn't conducting electricity or getting shocked, just burned.Parker wrote:
he got the shit burned out of his hand when that shit welded together.
no shit, graphites a carbon isotope. carbon conducts electricityhoplite wrote:
End of the day. Pencils do conduct electricity. /argument
You've obviously never worked on a car then. It's not as hard as you might think to hit metal while working on/around the battery and short it.Freezer7Pro wrote:
It's really, really hard to get shocked by a car battery, unless you're wearing tin foil and have just been swimming in a salt solution. Even so, if your body would somehow short one out, you'd just die on the spot and not feel a thing.CrazeD wrote:
I know people who have been shocked by car batteries, so yes you can feel it.Freezer7Pro wrote:
AC. This is DC.
An AA battery can discharge a good 1.5A, but you won't die from holding one. Same with a car battery, it can output a good kA, but you can still touch it without even feeling it. Your body simply has too high resistance.