Patocazador
Member
My interpretation: Information = two or more facts each building on a previous one.
eg: Lightning causes fire. Lightning is hot therefore generated (friction) heat could cause fire. ...Voila! it does cause fire.
Hand cannon, by CANNONMAN
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My interpretation: Information = two or more facts each building on a previous one.
eg: Lightning causes fire. Lightning is hot therefore generated (friction) heat could cause fire. ...Voila! it does cause fire.
Officers'Wife
Member
Okay, I can play that game too…
When we discover something, it falls under the heading of what we know and becomes information. Before it becomes information, it is what we don't know.
Or if you prefer a Maxwellian scientific approach, when data is proved it becomes information, before the data is collected and the results reproduced it is called theory.
I remember when I caused a fuss when I claimed that electrical discharges were NOT hot and that it was a problem of ground that caused heat. Electrical discharge to a good ground with BP in its way NOT being affected can be found within this site. Oh, and planes get struck by lightening don't blow up. So... disinformation? Fake news? How long was the world flat?
Officers'Wife
Member
*sigh* OK according to Joule - the power of heating generated by an electrical conductor is proportional to the product of its resistance and the square of the current. Since the resistance of the aircraft tends to be low the heating effect is low as well.
P (heat, power whatever) P= V x I (where V is voltage and I is current) it is also calculated as Officerswife said by IE2 x R
One must remember that current (I) is also a time based measurement (the amount of electrons moving past a given point in a period of time)
another analogy is that is not really that accurate but workable in a crude way is Voltage can be considered water pressure, resistance is the diameter an length of the pipe (thickness and length of wire but also material it's made of unlike the pipe analogy) and current can be compared to the amount of water moving through the pipe.
Remember lightning does not totally incinerate of blow up people either despite it's HUGE VOLTAGE (40,000 to 120,000 volts) and 5000 to 20,000 amperes sometimes 100,000 to 200,000 amperes but despite that is so brief (think stun gun) that although it can and does kill it is often survivable.
A higher resistance does not have as much effect on power (heat) as a higher current (amperes) the square root of the current has a much more profound effect on the formula P = IE2 x R raising the resistance lowers the current for any given voltage and LOWERING THE RESISTANCE INCREASES THE CURRENT FOR ANY GIVEN VOLTAGE (DON'T FORGET THIS)
A sure way to fry a circuit and make lots of smoke and flames is to lower it's resistance to a point where the circuits rating cannot handle the amount of current running through it (otherwise known as a short circuit) or to increase the voltage to a point that it pushes more current through the circuit than it can handle (I call it plain old frying)
So if that lightning strike was not so brief a lower resistance object such as an airplane would pop into a big puff of molten metal, sparks, and smoke as well as most other things because it has a huge amount of voltage generated and as a result pushes more current than most things can handle but thankfully despite its violent effects such a blasting every stitch of clothing off someones body it is brief and most lethal effects are due to cardiac arrhythmias.
I feel so high and mighty giving you guys an ohms law lesson don't all thank me at once. I am just kidding you know that right ?
One must remember that current (I) is also a time based measurement (the amount of electrons moving past a given point in a period of time)
another analogy is that is not really that accurate but workable in a crude way is Voltage can be considered water pressure, resistance is the diameter an length of the pipe (thickness and length of wire but also material it's made of unlike the pipe analogy) and current can be compared to the amount of water moving through the pipe.
Remember lightning does not totally incinerate of blow up people either despite it's HUGE VOLTAGE (40,000 to 120,000 volts) and 5000 to 20,000 amperes sometimes 100,000 to 200,000 amperes but despite that is so brief (think stun gun) that although it can and does kill it is often survivable.
A higher resistance does not have as much effect on power (heat) as a higher current (amperes) the square root of the current has a much more profound effect on the formula P = IE2 x R raising the resistance lowers the current for any given voltage and LOWERING THE RESISTANCE INCREASES THE CURRENT FOR ANY GIVEN VOLTAGE (DON'T FORGET THIS)
A sure way to fry a circuit and make lots of smoke and flames is to lower it's resistance to a point where the circuits rating cannot handle the amount of current running through it (otherwise known as a short circuit) or to increase the voltage to a point that it pushes more current through the circuit than it can handle (I call it plain old frying)
So if that lightning strike was not so brief a lower resistance object such as an airplane would pop into a big puff of molten metal, sparks, and smoke as well as most other things because it has a huge amount of voltage generated and as a result pushes more current than most things can handle but thankfully despite its violent effects such a blasting every stitch of clothing off someones body it is brief and most lethal effects are due to cardiac arrhythmias.
I feel so high and mighty giving you guys an ohms law lesson don't all thank me at once. I am just kidding you know that right ?
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kBob
Member
Look for a James Burke TV show called Connections.
My favorite of the pole arms ( single shot tube mounted on a pole) has to be the "Murderers" on the English wreck Mary Rose. Think "Reusable Claymore mine on a stick" and there you have it. It used cubical shot hammered into a fan shaped muzzle for horizontal shot gun spreader effect. Gives a whole different meaning to the term "clear the decks."
-kBob
My favorite of the pole arms ( single shot tube mounted on a pole) has to be the "Murderers" on the English wreck Mary Rose. Think "Reusable Claymore mine on a stick" and there you have it. It used cubical shot hammered into a fan shaped muzzle for horizontal shot gun spreader effect. Gives a whole different meaning to the term "clear the decks."
-kBob
BCRider
Member
Make a handgonne without modern tech? That would see you with a hammer in one hand tongs and red hot metal in the other and a good size anvil in front of you. Those old handgonnes would have been forged from hammered out plate given tapered edges then folded around a mandrel of forged iron and finally forge welded to close the seam.
The outer surfaces could and were hammered smooth and shaping elements were similarly forged into the pieces. The real trick was keeping the round bore mandrel that was used to hold the walls from overheating and becoming part of each handgonne.
But that's all a lot of work and requires pretty special skills. So these days we "cheat" and use a lathe....
The outer surfaces could and were hammered smooth and shaping elements were similarly forged into the pieces. The real trick was keeping the round bore mandrel that was used to hold the walls from overheating and becoming part of each handgonne.
But that's all a lot of work and requires pretty special skills. So these days we "cheat" and use a lathe....
BCRider
Member
By the way.... the handgonnes pre-date the Browning blokes and even those "johnny come lately" dueling pistols by quite an amount. Long before even matchlocks were a gleam in the inventor's eye soldiers were loading handgonnes and shooting them by igniting the pan charge with a red hot wire. The nitre soaked "match" didn't come along for quite some time. So the "gonne'ers" were always warm since they couldn't be far from the fire where the poking wires were kept heated. Hmmmm.... supplies of black powder and a red hot fire all within arm's reach.... Sounds like the gonner's themselves were in as much or more danger than those they were shooting at.....
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