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Plant Sciences, Zoology & Evolution / Re: Do Spiders Cooperate ?
« on: Yesterday at 17:23:27 »
Do Spiders Cooperate ?
They mate.
They mate.
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General Science / Re: Are Black Holes The Blackest Things Ever ?
« on: 27/05/2022 15:55:29 »They're not perfectly black, but they're blacker than a place in space with no stars in it.Why is the one in the middle winking at us?
The black sheep don't quite win, but close.
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Chemistry / Re: What colour is paint before the colour is added?
« on: 18/05/2022 18:32:01 »
It seems unlikely that the OP is going to return to a decade-old post.
Just in case they do- until you add the pigment, you don't have paint. So the question makes no sense.
Just in case they do- until you add the pigment, you don't have paint. So the question makes no sense.
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Chemistry / Re: How well understood is the Chemistry of the trans-uranic elements?
« on: 17/05/2022 21:38:22 »
For a given definition of "industrial", Californium (98) also has uses- as a neutron source.
Perhaps more relevantly, the colours of some of its compounds have been observed.
Perhaps more relevantly, the colours of some of its compounds have been observed.
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Chemistry / Re: How well understood is the Chemistry of the trans-uranic elements?
« on: 16/05/2022 21:29:28 »adding a handful of singly (or doubly) positively charged ligands at a radius of 150 picometersHow would you get them to stay (either near to your centre atom or even to each other)?
Essentially, in order to change the rate of a nuclear reaction you have to change the energies involved by an amount comparable with the decay energy.
And the problem is that chemical energies- like ligands are about a million times smaller than typical nuclear energies.
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New Theories / Re: what is temperature?
« on: 09/05/2022 13:00:33 »Why don't polyatomic gases rotate nor vibrate at low temperature?Because the energy available to them is less than that required to get them to rotate or vibrate.
Is vibrational energy also quantized?Yes.
QM is not important.Yes it is.
What's the minimum non-zero quantity of of rotational energy?It depends on the molecule.
For N2 I think it's about 10^-4 eV.
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Technology / Re: Are electric cars responsible for natural gas demand?
« on: 30/04/2022 12:29:39 »I'm all for the electrification of transport. Underground railways and trolleybuses are great, and electric cars are terrific fun to drive.But we don't have (and can't have) enough electricity from non-fossil sources to abandon gasoline, diesel, and gas-generated electricity to meet current and predicted demand.And when the oil runs out, we won't have gasoline and diesel.
So we had better start planning to decarbonise the economy now, while we still can.
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Chemistry / Re: What happens when Benzalkonium Chloride laundry sanitiser mixes with detergent?
« on: 28/04/2022 18:50:19 »
Anionic and cationic detergents (like benzalkonium) are mutually antagonistic.
It's better not to mix them.
What are you seeking to achieve?
A lot of microorganisms are inactivated by any detergents and, even if they aren't, washing them down the drain largely solves the problem.
It's better not to mix them.
What are you seeking to achieve?
A lot of microorganisms are inactivated by any detergents and, even if they aren't, washing them down the drain largely solves the problem.
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Physiology & Medicine / Re: Can a fungus be a parasite and what distinguishes the two?
« on: 19/04/2022 21:23:39 »The skin itself was fine up until I used this productI don't understand, surely it was not fine- or why would you have used the product?
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Physiology & Medicine / Re: Can a fungus be a parasite and what distinguishes the two?
« on: 19/04/2022 21:22:16 »Sorry to clarify. If you don't think a contaminant in the vaseline could cause an ongoing skin condition.Not one that would last this long.
Incidentally, Vaseline has an odour- a slight one but definite. It smells like mineral oil.
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New Theories / Re: If there was one Big Bang event, why not multiple big bangs?
« on: 16/04/2022 11:28:45 »We all know that the moon has real tidal impact on the Earth.And we know it won't last forever.
This is a perfect example how new energy is created due to gravity tidal momentum/force.No
It's an example of how the energy in the system is converted from one form to another.
There is no new energy.
You all know that this statement is correct.
Yes, those eight words are correct.
But the rest of your rambling is not.
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New Theories / Re: If there was one Big Bang event, why not multiple big bangs?
« on: 16/04/2022 11:25:32 »I claim that Tidal energy could change the path of the rock.You might as well claim that unicorns can do it.
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New Theories / Re: If there was one Big Bang event, why not multiple big bangs?
« on: 15/04/2022 20:04:01 »"We find that the Sun loses mass 4.289×10^12 g every second to energy. Or, in other units, the Sun loses mass 1.353×10^20 g every year to energy."Let's do a thought experiment- they are cheap.
Say we magically switch the Sun off and wait a few years.
OK, imagine a rock orbiting the Sun at a distance of a little over a light year.It has an orbital period given by the distance, and the mass of the Sun.
Then we switch the Sun back on.
Light and the solar wind stream out from the Sun- it loses mass.
But the path of the rock does not change until the light reaches it.
Because all that light is made of photons with relativistic mass.
And that mass exactly balances the mass lost from the Sun.
In a very large universe, the same is true without needing to switch the sun on and off.
It turned on about 4.6 billion years ago. Anything more than (about) 4.6 billion light years away will be subject to the same pull from [ the sun together with the radiation and solar wind] as it was before it lit up.
The Sun loses mass, but the rest of the universe gains that mass.
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Just Chat! / Re: why is bored chemist "bored"
« on: 14/04/2022 20:51:32 »
It's a very old name.
I first used it on a different site which was mainly about electronics.
They were arguing about some point of chemistry- I forget what- and I joined the forum just to be " a bored chemist surfing the net who came across this discussion", so I could explain that they were not getting anywhere in their discussion because the chemistry was fundamentally wrong.
I first used it on a different site which was mainly about electronics.
They were arguing about some point of chemistry- I forget what- and I joined the forum just to be " a bored chemist surfing the net who came across this discussion", so I could explain that they were not getting anywhere in their discussion because the chemistry was fundamentally wrong.
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Geology, Palaeontology & Archaeology / Re: Did ancient builders suffer from respiratory disease?
« on: 11/04/2022 12:58:18 »would not a majority of the grinders sanders suffer respiratory diseaseMany did.
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Physics, Astronomy & Cosmology / Re: How does a red-shift affect a black body spectrum?
« on: 05/04/2022 08:37:54 »
It is well known that the "shape" of a red shifted BB spectrum still looks like a BB spectrum.
That's where the CMBR comes from.
That's where the CMBR comes from.
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New Theories / Re: what is temperature?
« on: 31/03/2022 23:16:13 »That's a definition of one value for a temperature for one type of macroscopic system. It doesn't provide a whole scale of temperatureIt (together with the definition of absolute zero) is the only fixed point on the whole of the Kelvin temperature scale.
Last time I checked, they compared things to the water point, using a constant volume helium thermometer extrapolated to zero pressure.
That is, in effect, using the ideal gas laws.
This might be helpful.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4865254/
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Just Chat! / Re: What is your main area of interest or expertise?
« on: 31/03/2022 18:09:06 »Advance Notice: I'm going to give the award of the "best answer" in a couple of days. If you want a chance to win this greatly coveted award then get your replies in soon.Thanks for the warning; I will wait...
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New Theories / Re: Could the Hubble constant be related to the proton radius?
« on: 20/03/2022 19:01:16 »OK, I am glad that there are so many replies, so thank you again for all those comments.Let me know when you plan to get to this one.
I here try to answer some of them, but one at a time.
The fact that it fails on dimensional analysis is beside the point unless he can explain why something constant is the same as something that's changing.
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