Feeds

* Posts by Chemist

1853 posts • joined 24 Mar 2010

Superhero oil-burping algae will save the world

Chemist
Silver badge

"Synthetic fuel is actually quite old"

Mostly made by hydrogenating coal !

0
0

Samsung strokes big bulb that'll keep going for decades

Chemist
Silver badge

I've just been in B&Q

and they had 50W equivalents on the shelf with 25 years printed on the packaging.

Mind I think they were @30GBP

0
0

Not so fast: Italian boffins say neutrinos not faster than light

Chemist
Silver badge

Incidently...

I've just looked at the detector web-site. The detector stack is 25 m long ! so the transit time for a light speed particle would be about 80nS

I assume the detection events are found over the entire length and then averaged in some way

http://www-opera.desy.de/pics/detector2.jpg

0
0
Chemist
Silver badge

"only releasing it 3 hours later"

Photons interact STRONGLY with matter - that slows them down - that's why light travels slower than c in matter

0
0
Chemist
Silver badge

"And since established theory forbids superluminal travel"

AFAIK it only forbids superluminal speeds* in a vacuum, but in anything else where light is traveling at less than c then these sort of effects (e.g. Cherenkov radiation) are seen.

* Yes, I know the theory only actually forbids reaching light speed not travelling faster

1
0
Chemist
Silver badge

"tunnel through the c barrier "

My understanding of tunneling is that it can ONLY occur if the energy barrier is finite. It then becomes a question of what that means for a FTL transition

0
0
Chemist
Silver badge

"ize and composition of a star 168,000 light years away "

Well try this - for our local star - on average it takes many,many years for a photon, once generated as a gamma ray, to escape from the sun due to the dense interactions in the core.

0
0

We're searching for life, Jim, but not as we know it

Chemist
Silver badge

"It's about time boffins took this idea seriously."

There's no need to take this seriously - if life can evolve in such diverse conditions you'd basically have to look almost everywhere so why not leave it at that.

0
0

SQUID calls 'virtual photons' into real existence

Chemist
Silver badge

"Conservation laws are already gone #"

NONESENSE !

Particles created near black holes are effectively taking mass from the black hole which will eventually vanish ( if no matter replenishes the black hole ) This is exactly why micro black holes are thought to have a very short lifetime and hence if the LHC somehow managed to create any it wouldn't be a problem

1
0
Chemist
Silver badge

"Poor thing must be busting for the litter tray"

It might be or maybe not - you'll have to look

6
0

Gov web boss: Our sites look like bleak council estates

Chemist
Silver badge

It would be best ...

if they were standards compliant, clear and up-to-date - forget the eye-candy.

5
0

Will Intel slay or flee fearsome Snapdragon Win 8 tab?

Chemist
Silver badge

MOS Technology

The 6502 was mostly designed by a Motorola team but they moved to MOS when Motorola didn't want the design. THE Motorola 8-bit was the 6809

0
0

Neutrinos still FASTER THAN LIGHT in second test

Chemist
Silver badge

How many more times...

"Five hundred years ago, everybody knew the Earth was flat"

Almost everyone who THOUGHT about it didn't think it was flat. Most people weren't bothered either way. Sailors and anyone living near the coast knew if wasn't flat, ships would slowly 'sink' below the horizon and then come back

0
0
Chemist
Silver badge

"hat all the possible errors fell well short of 60 nanoseconds."

All the random errors. Doesn't say anything about systematic errors like the clocks and distances.

This latest experiment suggests that one possible systematic error is not the reason for the observed 'speed'

0
0
Chemist
Silver badge

Re : Is this really new?

That's because light interacts strongly with matter so takes some time to escape from the super nova whereas neutrinos don't so set off first at almost c.

1
0
Chemist
Silver badge

"Have they tried firing them in the opposite direction"

I don't think anyone wants to build another CERN accelerator in Italy unless it's absolutely necessary.

1
0

Enormous orbiting solar raygun power plants touted

Chemist
Silver badge

Re :"What about the poles? "

The apparent rotation of the earth would be zero as the satellite is intended for geostationary orbit.

1
0
Chemist
Silver badge

@Error Message

It's intended for geostationary - in any case how else would it be able to point at a receiver array ?

0
0
Chemist
Silver badge

@Tomato42

I make it ~0.9c but I take your point. It does point out the difficulty ( I mean impossibilty ) of fuelling any type of ship intended for such speeds. Any fuel mass just becomes more mass to accelerate .... recurses !

0
0

LHC results may solve riddle of how universe can exist

Chemist
Silver badge

"Do we *know* that matter...... "

Well of course we do - Dan Brown cleared that up years ago

1
0

Google flings Bing into search engine bin

Chemist
Silver badge

"But I'm curious to know..."

Bookmarks

1
0

Fusion boffins crack shreddy eddy plasma puzzle

Chemist
Silver badge

"but hoping this isn't a sham.."

It is

4
1

Toyota, Intel connect to connect cars to web

Chemist
Silver badge

"reboot 14 times"

Nah, mine will run Linux

1
0

Mars, Moon, solar system could be littered with alien artifacts

Chemist
Silver badge
Headmaster

@NomNomNom

As I said "it's still one very large number ( of targets) of which we are 1."

I assumed they may well send multiple probes it's just that the number of 'local targets' is enormous. I think probes doing 'grand tours' is rather far-fetched and in any case would take a long, long time.

0
0
Chemist
Silver badge

Very good but

you should really acknowledge that the quote is from Hitchhikers

1
0
Chemist
Silver badge

There may well be millions of 'advanced civilizations..

but space is BIG, VERY BIG.

Consider if there were 1 million advanced civilizations in the galaxy willing to send probes - they've got a choice of ~4e11 stars to send a probe to. OK they could rule out quite a lot but it's still one very large number of which we are 1. Plus the distance. So we'd be dependant on a civilization developing in our neighbourhood, wanting to send missions, choosing us amongst many, and the probe arriving, not malfunctioning and us spotting it.

Far fetched

2
0

Shale gas: If we've got it, flaunt it

Chemist
Silver badge

"but will is actually kill you"

Yes at concentrations of ~5-10% in air

0
0
Chemist
Silver badge

"Since when was shale gas low carbon?"

Most of the energy comes from burning the hydrogen in methane.

A mole of carbon (12g) burning to CO2 (22.4L )emits ~350 kJ

A mole of methane (16g) burns to CO2 (22.4L) + 2H2O and gives ~900kJ

3
0

US.gov: We aren't hiding any space aliens

Chemist
Silver badge

Re : So which is more likely....

6) The distances are too large and nobody has found a way round that.

0
0

Is the electromagnetic constant a constant?

Chemist
Silver badge

But ...

they're NOT all inbred today ( including pigs). So where did they come from ?

0
0
Chemist
Silver badge

As a total aside..

I wouldn't have known you in my former life as Von K by any chance ?

If you don't immediately know what I mean that's fine - Von K isn't you

0
0
Chemist
Silver badge

I prefer the quote attributed to Einstein ..

which (roughly) is ..

"In science everything should be as simple as possible ...but no simpler"

0
0
Chemist
Silver badge

"taking two of each animal onto an ark"

Leading to totally inbred animals

1
1

UN set to dump GMT for tech-friendly Atomic Time

Chemist
Silver badge

"the radioactive decay of a material doesn't ........."

What has radioactive decay to do with atomic clocks ?

0
0

Mobile industry needs Windows, handset vendors warn

Chemist
Silver badge

"Having just two operating systems available isn’t good for innovation!

And on the desktop ??

4
0

US Navy in new electromagnetic railgun milestone

Chemist
Silver badge

At 500 miles range ..

It's going to need some mechanism to steer it just to keep to the earth's curvature unless the ballistic arc just happens to match.

OK if it hits something solid like a building or tank but a thin-walled, unarmoured warship - it will punch a hole clean through unless it hits something with significant resistance/mass.

0
0
Chemist
Silver badge

but it won't be that bad...

So being hit by a heavy, pointy, metal object at terminal velocity is OK ?

0
0

Shale gas operations triggered Blackpool tremors

Chemist
Silver badge

"there are quantum differences...."

Do you even know what this means ?

2
0

It's time to end the Windows Wait

Chemist
Silver badge

"the important system routines that are analyzing..........."

That had a certain 'Hitchhikers" feel to it.

0
0

Fujitsu busts K super through 10 petaflops

Chemist
Silver badge

"cannot run Crysis"

On the other hand bash commands are quite quick.

0
0

As iPhone 4S battery suckage spreads, fixes appear

Chemist
Silver badge
Joke

"Cant believe the difference in quality and speed"

Do you mean you can talk much faster ?

0
1

Open-sourcers suggest Linux secure boot block workarounds

Chemist
Silver badge

Trust and Microsoft - two words that you don't see together without Don't in front

Who on earth downvoted this ?

4
2

97% of Three's network traffic is data

Chemist
Silver badge

Well I'm using a Three 3G dongle (Huawei E367)

and after 2 months intermittent use in various parts of the UK I'm very impressed (and I've still got most of my data allowance left )

Works fine on both a Linux laptop and netbook.

0
0

Tesla pre-sells all 2012 Model S output

Chemist
Silver badge

"Note just under 19 cars require a MW of power"

I think you need to check your figures - at ~9 kW I make it 111 cars/MW - I think you might have divided by the six hour charge time which isn't relevant.

The power they require is ~1MW for 111 cars. The energy consumption is ~1MW.h for 19 cars if the charge time is 6 hrs

0
0
Chemist
Silver badge

Nice analysis

I can only add that our (UK) house which is moderately large and uses electric cooking averages a consumption over the year of 4 amps - any significant numbers of electric cars are going to swamp the grid with demand

1
0

Earth escapes obliteration by comet

Chemist
Silver badge

"The equation to use is E=MC (squared)."

Please don't post on issues you clearly can't understand

1
0

Euro banks unhappy with proposed e-payment rules

Chemist
Silver badge

Strange

'Cos I can go online with my ( mainstream UK ) bank and send money to my Swiss current account with a few clicks and a £10 fee. I've used it for other transactions too.

1
0

Boffins insert 3D objects into any old photo... realistically

Chemist
Silver badge
Joke

"If you ever dragged a couch for the missus..."

That comment gives away the fact that you're not married. No self-respecting wife would accept a computer program's view when there's real work to be done

3
0

Toshiba demos monster hi-res tablet display

Chemist
Silver badge

"if each pixel emitted just one photon"

I guess you already know that each pixel would be MUCH less than the size of an atom and as visible light comes from electron orbital transitions around atoms ....

0
0
Chemist
Silver badge

"I want 1.57E33 ppi!"

You sir are a Planck !

0
0