From: Jim Thompson on
On Tue, 06 Jul 2010 12:59:35 -0700, John Larkin
<jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote:

>On Tue, 6 Jul 2010 12:46:20 -0700 (PDT), whit3rd <whit3rd(a)gmail.com>
>wrote:
>
>>On Jul 6, 6:53�am, John Larkin
>><jjlar...(a)highNOTlandTHIStechnologyPART.com> wrote:
>>> On Mon, 5 Jul 2010 22:28:44 -0700 (PDT), whit3rd <whit...(a)gmail.com>
>>> wrote:
>>>
>>> >On Jul 5, 9:41�pm, John Larkin
>>> ><jjlar...(a)highNOTlandTHIStechnologyPART.com> wrote:
>>>
>>> >> You can have two caps, C1 charged and C2 not, and transfer all the
>>> >> charge from C1 to C2, without loss. In fact, you can slosh the charge
>>> >> between them, back and forth, forever. Just don't use resistors.
>>>
>>> >It has to be identical size capacitors, otherwise 'all the charge'
>>> >can't be transferred without adding/losing energy...
>>>
>>> Not so.
>>
>>Put a microcoulomb of charge on a 1 uF capacitor. Transfer it all to
>>a 2 uF capacitor. The first state of the system holds twice the
>>energy of the second.
>
>
>Well, depends on words now. I can transfer "all the charge that's in
>C1 to C2" (ie, wind up with C1 at zero volts, and no energy lost) but
>the numerical amount of coulombs must change if the cap values are
>different, to conserve energy. I can move the charge back into C1, and
>return the system to its original state.
>
>My point was that you can move charge between caps, without losing
>energy, but not by using resistors.
>
>John
>

Depends on the definition of "depends" :-)

"Charge" IS conserved. So if you transfer Q from C1 to C2 >>>

C1*V1 == C2*V2

...Jim Thompson
--
| James E.Thompson, CTO | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

Obama: A reincarnation of Nixon, narcissistically posing in
politically-correct black-face, but with fewer scruples.
From: Adrian Jansen on

Jim Thompson wrote:
> On Tue, 06 Jul 2010 12:59:35 -0700, John Larkin
> <jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote:
>
>> On Tue, 6 Jul 2010 12:46:20 -0700 (PDT), whit3rd <whit3rd(a)gmail.com>
>> wrote:
>>
>>> On Jul 6, 6:53 am, John Larkin
>>> <jjlar...(a)highNOTlandTHIStechnologyPART.com> wrote:
>>>> On Mon, 5 Jul 2010 22:28:44 -0700 (PDT), whit3rd <whit...(a)gmail.com>
>>>> wrote:
>>>>
>>>>> On Jul 5, 9:41 pm, John Larkin
>>>>> <jjlar...(a)highNOTlandTHIStechnologyPART.com> wrote:
>>>>>> You can have two caps, C1 charged and C2 not, and transfer all the
>>>>>> charge from C1 to C2, without loss. In fact, you can slosh the charge
>>>>>> between them, back and forth, forever. Just don't use resistors.
>>>>> It has to be identical size capacitors, otherwise 'all the charge'
>>>>> can't be transferred without adding/losing energy...
>>>> Not so.
>>> Put a microcoulomb of charge on a 1 uF capacitor. Transfer it all to
>>> a 2 uF capacitor. The first state of the system holds twice the
>>> energy of the second.
>>
>> Well, depends on words now. I can transfer "all the charge that's in
>> C1 to C2" (ie, wind up with C1 at zero volts, and no energy lost) but
>> the numerical amount of coulombs must change if the cap values are
>> different, to conserve energy. I can move the charge back into C1, and
>> return the system to its original state.
>>
>> My point was that you can move charge between caps, without losing
>> energy, but not by using resistors.
>>
>> John
>>
>
> Depends on the definition of "depends" :-)
>
> "Charge" IS conserved. So if you transfer Q from C1 to C2 >>>
>
> C1*V1 == C2*V2
>
> ...Jim Thompson
If you conserve energy, then you must have

C1*V1^2 = C2*V2^2

--
Regards,

Adrian Jansen adrianjansen at internode dot on dot net
Note reply address is invalid, convert address above to machine form.
From: krw on
On Tue, 06 Jul 2010 10:40:37 -0700, Jim Thompson
<To-Email-Use-The-Envelope-Icon(a)On-My-Web-Site.com> wrote:

>On Tue, 06 Jul 2010 10:16:23 -0700, John Larkin
><jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote:
>
>>On Tue, 6 Jul 2010 11:33:11 -0500, "Tim Williams"
>><tmoranwms(a)charter.net> wrote:
>>
>>>"John Larkin" <jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote in message news:jtl6361te3ku4ukh0jhp05tab4tvhjjqru(a)4ax.com...
>>>> Connect an inductor across C1 until you've bled it down to half its
>>>> charge. Now connect that inductor to C2 and charge it up to the same
>>>> charge as C1 has. Now disconnect the inductor. If you keep the L
>>>> shorted, you can save the residual energy for reuse later.
>>> ^ ^ ^ ^
>>>Ha, so charge wasn't conserved after all. See? ;-)
>>>
>>>Tim
>>
>>All my cases involved controlling the charges on two capacitors. I
>>never proposed violating conservation of energy. My point is that
>>inductors can be useful in some situations.
>>
>>John
>
>Your "point" is, as usual, vagueness and subterfuge... and BS.
>
>For amusement, newbies are invited to MATHEMATICALLY analyze this
>simple case...
>
>Two equal value capacitors (C), one charged to Vo, the other uncharged
>(zero volts).
>
>Connect together with a switch, start with a finite resistance value,
>analyze; then reduce the resistance, re-analyze; continue this
>analysis, approaching zero in the limit.
>
>Then scratch your head in surprise... where did the energy go ?:-)

Where it always goes.
From: m II on
StickThatInMyAssandRotateIT! wrote:


> snipped retardedly formatted text.

> like an idiot

> Mr. Useitasitcomesoutoftheboxtotalretard.


So, Archie....how's that Exorcism coming along? Able to control your
involuntary obscenities yet? Probably not. Keep trying. Jesus Loves YOU!



============================================
But I say to you that everyone who is angry with his brother will be
liable to judgment; whoever insults his brother will be liable to the
council; and whoever says, �You fool!� will be liable to
the hell of fire.

Matthew 5:22


http://www.photosforsouls.com/hells-fire-duncanlong181.jpg
============================================



father mike

From: JosephKK on
On Wed, 07 Jul 2010 08:18:12 +1000, Adrian Jansen <adrian(a)qq.vv.net>
wrote:

>
>Jim Thompson wrote:
>> On Tue, 06 Jul 2010 12:59:35 -0700, John Larkin
>> <jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote:
>>
>>> On Tue, 6 Jul 2010 12:46:20 -0700 (PDT), whit3rd <whit3rd(a)gmail.com>
>>> wrote:
>>>
>>>> On Jul 6, 6:53 am, John Larkin
>>>> <jjlar...(a)highNOTlandTHIStechnologyPART.com> wrote:
>>>>> On Mon, 5 Jul 2010 22:28:44 -0700 (PDT), whit3rd <whit...(a)gmail.com>
>>>>> wrote:
>>>>>
>>>>>> On Jul 5, 9:41 pm, John Larkin
>>>>>> <jjlar...(a)highNOTlandTHIStechnologyPART.com> wrote:
>>>>>>> You can have two caps, C1 charged and C2 not, and transfer all the
>>>>>>> charge from C1 to C2, without loss. In fact, you can slosh the charge
>>>>>>> between them, back and forth, forever. Just don't use resistors.
>>>>>> It has to be identical size capacitors, otherwise 'all the charge'
>>>>>> can't be transferred without adding/losing energy...
>>>>> Not so.
>>>> Put a microcoulomb of charge on a 1 uF capacitor. Transfer it all to
>>>> a 2 uF capacitor. The first state of the system holds twice the
>>>> energy of the second.
>>>
>>> Well, depends on words now. I can transfer "all the charge that's in
>>> C1 to C2" (ie, wind up with C1 at zero volts, and no energy lost) but
>>> the numerical amount of coulombs must change if the cap values are
>>> different, to conserve energy. I can move the charge back into C1, and
>>> return the system to its original state.
>>>
>>> My point was that you can move charge between caps, without losing
>>> energy, but not by using resistors.
>>>
>>> John
>>>
>>
>> Depends on the definition of "depends" :-)
>>
>> "Charge" IS conserved. So if you transfer Q from C1 to C2 >>>
>>
>> C1*V1 == C2*V2
>>
>> ...Jim Thompson
>If you conserve energy, then you must have
>
>C1*V1^2 = C2*V2^2

By analogy, consider a billiard ball striking another (at rest) ball 1/4
diameter away from the line of centroid motion (glancing blow / cut).
Does energy and momentum get conserved? Show the math.