Guest
Fri Feb 02, 2007 11:43 am
Do mobile phones wegh more when charged for some reason? Mine always
feel heavier?
THanks,
Phil
CWatters
Guest
Fri Feb 02, 2007 5:58 pm
<phil.jacobs_at_starlizard.com> wrote in message
news:1170412985.287112.326820_at_m58g2000cwm.googlegroups.com...
Quote:
Do mobile phones wegh more when charged for some reason? Mine always
feel heavier?
THanks,
Phil
No. Where do you think the extra weight comes from? The battery is sealed
right. It's not from electrons going into the battery either.
john jardine
Guest
Sat Feb 03, 2007 12:55 am
<phil.jacobs_at_starlizard.com> wrote in message
news:1170412985.287112.326820_at_m58g2000cwm.googlegroups.com...
Quote:
Do mobile phones wegh more when charged for some reason? Mine always
feel heavier?
THanks,
Phil
Yes. They do weigh a tad more, though I doubt it's enough to notice.
john
--
Posted via a free Usenet account from
http://www.teranews.com
Wim Lewis
Guest
Sat Feb 03, 2007 5:29 am
In article <45c3c2df$0$16265$88260bb3_at_free.teranews.com>,
john jardine <john_at_jjdesigns.fsnet.co.uk> wrote:
Quote:
phil.jacobs_at_starlizard.com> wrote in message
news:1170412985.287112.326820_at_m58g2000cwm.googlegroups.com...
Do mobile phones wegh more when charged for some reason? Mine always
feel heavier?
Phil
Yes. They do weigh a tad more, though I doubt it's enough to notice.
I'm guessing it's just psychological in Phil's case. The weight of the
energy (ala e=mc^2) would be, uhhh, about 20 kJ = 0.0000000002 grams.
Some battery chemistries use the surrounding air in their reaction,
don't they? So if you had a zinc-air cell phone battery, might it weigh
more when charged? Doubtless still too little to detect without an
instrument, though.
--
Wim Lewis <wiml_at_hhhh.org>, Seattle, WA, USA. PGP keyID 27F772C1
Homer J Simpson
Guest
Sat Feb 03, 2007 7:46 am
"Wim Lewis" <wiml_at_hhhh.org> wrote in message
news:eq0vj7$n4l$1_at_underhill.hhhh.org...
Quote:
Some battery chemistries use the surrounding air in their reaction,
don't they? So if you had a zinc-air cell phone battery, might it weigh
more when charged?
When exhausted perhaps? As air combines with the zinc?
jasen
Guest
Sat Feb 03, 2007 7:54 am
On 2007-02-02, phil.jacobs_at_starlizard.com <phil.jacobs_at_starlizard.com> wrote:
Quote:
Do mobile phones wegh more when charged for some reason?
Yes, E=mc^2
Quote:
Mine always feel heavier?
Odd, the difference shouln't be noticable (or even measurable)
Bye.
Jasen
sundar
Guest
Sat Feb 03, 2007 5:21 pm
On Feb 3, 11:54 am, jasen <j...@free.net.nz> wrote:
Quote:
On 2007-02-02, phil.jac...@starlizard.com <phil.jac...@starlizard.com> wrote:
Do mobile phones wegh more when charged for some reason?
Yes, E=mc^2
Is E=mc^2 actually applicable here? I think not... What it actually
says is that when an energy E is 'converted' into an equivalent mass
you get a mass m=E/(c^2). Here in this case, the energy is stored as
energy itself - as electrostatic energy between the terminals of the
battery. The charges too do not get 'introduced'. They just get
unbalanced so that they have to use the external circuit we are going
to connect to get balanced. So it seems that no mass gets added,
either due to the energy added or due to charge seperation. This can't
account for the mobile feeling heavier, but may be there's some
complicated reason for that one, or may be it's simply psychology...
jasen
Guest
Sun Feb 04, 2007 1:48 am
On 2007-02-03, sundar <sundaryourfriend_at_gmail.com> wrote:
Quote:
On Feb 3, 11:54 am, jasen <j...@free.net.nz> wrote:
On 2007-02-02, phil.jac...@starlizard.com <phil.jac...@starlizard.com> wrote:
Do mobile phones wegh more when charged for some reason?
Yes, E=mc^2
Is E=mc^2 actually applicable here?
it is.
Quote:
I think not... What it actually says is that when an energy E is
'converted' into an equivalent mas you get a mass m=E/(c^2).
Here in this case, the energy is stored as energy itself
???
Quote:
- as electrostatic energy between the terminals of the
battery.
no, as chemical potential energy - reconfigured molecules inside the
cells.
Bye.
Jasen
Sjouke Burry
Guest
Sun Feb 04, 2007 5:06 am
sundar wrote:
Quote:
On Feb 3, 11:54 am, jasen <j...@free.net.nz> wrote:
On 2007-02-02, phil.jac...@starlizard.com <phil.jac...@starlizard.com> wrote:
Do mobile phones wegh more when charged for some reason?
Yes, E=mc^2
Is E=mc^2 actually applicable here? I think not... What it actually
says is that when an energy E is 'converted' into an equivalent mass
you get a mass m=E/(c^2). Here in this case, the energy is stored as
energy itself - as electrostatic energy between the terminals of the
battery. The charges too do not get 'introduced'. They just get
unbalanced so that they have to use the external circuit we are going
to connect to get balanced. So it seems that no mass gets added,
either due to the energy added or due to charge seperation. This can't
account for the mobile feeling heavier, but may be there's some
complicated reason for that one, or may be it's simply psychology...
Yep. As soon as relations between particles change
and because of that total energy changes, total mass
changes.
No loopholes have been found anywhere in physics.
Homer J Simpson
Guest
Sun Feb 04, 2007 5:47 am
"Sjouke Burry" <burrynulnulfour_at_ppllaanneett.nnlll> wrote in message
news:45c55bdf$0$535$ba620dc5_at_text.nova.planet.nl...
Quote:
No loopholes have been found anywhere in physics.
Black holes? Vortexes?
Sjouke Burry
Guest
Sun Feb 04, 2007 6:38 am
Homer J Simpson wrote:
Quote:
"Sjouke Burry" <burrynulnulfour_at_ppllaanneett.nnlll> wrote in message
news:45c55bdf$0$535$ba620dc5_at_text.nova.planet.nl...
No loopholes have been found anywhere in physics.
Black holes? Vortexes?
You have a problem with black holes and vortices in
your batterycharger?
And those are not loopholes in energy storage and
conversion.
Michael
Guest
Sun Feb 25, 2007 6:40 pm
phil.jacobs_at_starlizard.com wrote:
Quote:
Do mobile phones wegh more when charged for some reason? Mine always
feel heavier?
THanks,
Phil
Cell phones seem to weigh the least when fully charged and the most when battery
is dead. Haven't you noticed that even the most rabid cell talker eventually
tires of holding that silly blob against his/her head and that nobody cares to
do that at all when the battery is depleated? <G>
No, a fully charged "cell" is heavier than a dead one, for the same reason that
a freshly washed and waxed car runs better than a dirty one.
