New Wireless mouse and key board
ChristianKnight
Not bad and a dream to use.
With a greater range one could have a Lap top and a big 50 inch flat
creen on the wall then life would be just like George Orwells ninety
eighty four adding voice recognition.
Christ's love
EMB
You are aware that being wireless it emits harmful electromagnetic
radiation and will cause cancer aren't you CK?
~misfit~
Shhhh! It also makes one sterile.
--
Shaun.
"Give a man a fire and he's warm for the day. But set fire to him and he's
warm for the rest of his life." Terry Pratchet, 'Jingo'.
ChristianKnight
No please provide a link
Christ's love
Lawrence D'Oliveiro
ccc604...@a6g2000yqm.googlegroups.com>, ChristianKnight wrote:
I, too, would like to know if you can cite the site on which you sighted
this ... shite?
Matty F
wrote:
> Somewhere on teh intarwebs EMB wrote:
>
> > On 9/01/2010 7:08 a.m., ChristianKnight wrote:
> >> $50.00 delivered.
> >> Not bad and a dream to use.
> >> With a greater range one could have a Lap top and a big 50 inch flat
> >> creen on the wall then life would be just like George Orwells ninety
> >> eighty four adding voice recognition.
> >> Christ's love
>
> > You are aware that being wireless it emits harmful electromagnetic
> > radiation and will cause cancer aren't you CK?
>
> Shhhh! It also makes one sterile.
Well that's not going to be a problem for CK is it?
Matty F
central.gen.new_zealand> wrote:
> In message <16791e22-a104-4885-89d8-
Electromagnetic radiation is probably not a problem, and radon should
not a problem in wooden NZ houses without basements exposed to the
ground. However:
The radioactive decay products of radon attach themselves to dust.
Dust is attracted to charged surfaces such as TV screens and
electrical wiring.
http://enhs.umn.edu/hazards/hazardssite/radon/radonforskeptics.html
More about radon-222:
* Chemically inert, uncharged noble gas
* Produced from decay of uranium-238
* Seeps out of rocks and soil
* Builds up indoors and in mines
* T1/2 is 3.8 days
Decays by alpha particle emission
* Produces short-lived solid alpha-emitters - Polonium 218 and 214
Biological Effects of Radon
* Radon-222 gas does not cause health effects
* Solid charged radon progeny attach to airborne particulates
(dust)
* Dust particles are inhaled and can adhere to lung lining
* Deposited progeny decay by alpha emission
* Alpha particles impact bronchial epithelium
* Alpha particles can damage nuclear DNA
* Damaged DNA can lead to lung cancer
ChristianKnight
Thats pretty scary alright. Thanks
Christ's love
John Little
> More about radon-222:
>
> * Builds up indoors and in mines
You don't mention why; it's much denser than air, so pools in
basements and mines. Usually only a problem for places built on
granite, which would be rare in NZ I imagine.
Regards, John
Matty F
Some people use granite for benchtops, and have exposed brick walls
inside their houses. Brick and granite that exudes radon.
But let's not alarm the OP too much, he has more than enough to worry
about!
Lawrence D'Oliveiro
afb6-4ce...@u41g2000yqe.googlegroups.com>, Matty F wrote:
> On Jan 18, 11:56 am, John Little <john.b.lit...@gmail.com> wrote:
>
>> On Jan 14, 1:31 pm, Matty F <mattyf9...@yahoo.co.nz> wrote:
>>
>>> More about radon-222:
>>
>>> * Builds up indoors and in mines
>>
>> You don't mention why; it's much denser than air, so pools in
>> basements and mines. Usually only a problem for places built on
>> granite, which would be rare in NZ I imagine.
>
> Some people use granite for benchtops, and have exposed brick walls
> inside their houses. Brick and granite that exudes radon.
Why should brick exude radon?
Matty F
central.gen.new_zealand> wrote:
> In message <a7e5fa9c-2053-42ea-
Bricks are made from clay. Clay has uranium in it. Uranium decays to
form radon.
Lawrence D'Oliveiro
Uranium’s not that common, surely.
Matty F
central.gen.new_zealand> wrote:
There's enough uranium in granite to power its extraction from that
granite. The decay of uranium is the main reason the Earth is stll
warm after billions of years. You thought the Sun was the main thing
keeping the Earth warm didn't you?
Lawrence D'Oliveiro
I thought it was just leftover heat from the Earth’s formation. Compare
Venus, the Moon and Mars, all formed in the same vicinity, of similar
elements; the two smaller ones have already lost all their interior heat,
and hence their capacity for plate tectonics. If it was down to radioactive
decay, they would all still be internally hot, wouldn’t they?
Matty F
central.gen.new_zealand> wrote:
Lord Kelvin, not knowing about radioactive decay. worked out that the
Earth must be way under a billion years old, assuming that it was
molten to start with. Rutherford put him right, diplomatically!
The Moon and Mars are too small for residual heat or radioactivity to
be an important heat source (because of the square and cube laws).
Venus is still hot.
Dave Doe
21g2000yqj.googlegroups.com>, matty...@yahoo.co.nz says...
>
> On Jan 19, 6:43 pm, Lawrence D'Oliveiro <l...@geek-
> central.gen.new_zealand> wrote:
> > In message <30ba3cb9-f87d-4e74-8f71-176a39a99...@o28g2000yqh.googlegroups.com>, Matty F wrote:
> >
> >
> >
> > > On Jan 19, 11:07 am, Lawrence D'Oliveiro <l...@geek-central.gen.new_zealand> wrote:
> >
> > >> In message
> > >> <44862aa1-a039-435f-8b90-9c5306d43...@h9g2000yqa.googlegroups.com>, Matty
> > >> F wrote:
> >
> > >> > On Jan 18, 1:48 pm, Lawrence D'Oliveiro
> > >> > <l...@geek-central.gen.new_zealand> wrote:
> >
> > >> >> Why should brick exude radon?
> >
> > >> > Bricks are made from clay. Clay has uranium in it. Uranium decays to
> > >> > form radon.
> >
> >
> > > There's enough uranium in granite to power its extraction from that
> > > granite. The decay of uranium is the main reason the Earth is stll
> > > warm after billions of years. You thought the Sun was the main thing
> > > keeping the Earth warm didn't you?
> >
> > Venus, the Moon and Mars, all formed in the same vicinity, of similar
> > elements; the two smaller ones have already lost all their interior heat,
> > and hence their capacity for plate tectonics. If it was down to radioactive
>
> Lord Kelvin, not knowing about radioactive decay. worked out that the
> Earth must be way under a billion years old, assuming that it was
> molten to start with. Rutherford put him right, diplomatically!
> The Moon and Mars are too small for residual heat or radioactivity to
> be an important heat source (because of the square and cube laws).
> Venus is still hot.
OT but, the definitive reference for Earnest Lord Rutherford is surely
the biography written by Dr John Campbell
(http://www.phys.canterbury.ac.nz/people/campbell.shtml), from
Canterbury Uni here in Otautahi. This is an interesting page...
http://www.rutherford.org.nz/msmyth.htm
--
Duncan.
Lawrence D'Oliveiro
> On Jan 19, 6:43 pm, Lawrence D'Oliveiro <l...@geek-central.gen.new_zealand> wrote:
>
>> In message
>> <30ba3cb9-f87d-4e74-8f71-176a39a99...@o28g2000yqh.googlegroups.com>,
>> Matty F wrote:
>>
>>> On Jan 19, 11:07 am, Lawrence D'Oliveiro
>>> <l...@geek-central.gen.new_zealand> wrote:
>>
>>>> Uranium’s not that common, surely.
>>
>> > There's enough uranium in granite to power its extraction from that
>> > granite. The decay of uranium is the main reason the Earth is stll
>> > warm after billions of years. You thought the Sun was the main thing
>> > keeping the Earth warm didn't you?
>>
>> I thought it was just leftover heat from the Earth’s formation. Compare
>> Venus, the Moon and Mars, all formed in the same vicinity, of similar
>> elements; the two smaller ones have already lost all their interior heat,
>> and hence their capacity for plate tectonics. If it was down to
>> radioactive decay, they would all still be internally hot, wouldn’t they?
>
> Lord Kelvin, not knowing about radioactive decay. worked out that the
> Earth must be way under a billion years old, assuming that it was
> molten to start with.
Close, but no cigar. His calculation was simply about the cooling of the
surface, not taking into account convection bringing more heat from the
interior
<http://en.wikipedia.org/wiki/Age_of_the_Earth#Early_calculations:_physicists.2C_geologists_and_biologists>.
> The Moon and Mars are too small for residual heat or radioactivity to
> be an important heat source (because of the square and cube laws).
And yet Mars has volcanoes that were once active. And the Moon also has vast
“seas” made of lava that was once molten.