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location United Kingdom
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seen Apr 12 '12 at 19:22

I am a cosmology layman. Have been an engineer most of my life, but I'm now technically retired. My work as an engineer, took me into safety audits, logic and logic scenarios, with regards to, the design of,the running and safety control, of industrial plant. Working with many companies such as the Admiralty, BP, etc. Logic scenarios entail, using logic to break down the individual actions/options involved in an action path, and seeing if any of these, can be replaced, to make a better action path. I've always had an interest in space, astronomy, cosmology, etc, but only in the past year, have I got deeper into that interest. I have a personal retirement project, to apply these logic principles, to look at the many actions/options, in some cosmology paths. It will probably come to nothing, but who knows. It keeps me happy.


Mar
31
awarded  Commentator
Mar
31
comment Where can I find open-source weather forecast software?
There is also a lot of good info on this site, with regards to weather and other properties of the planets, etc. Example: Some good information with regard to Venus climate and the recent "Venus Express" mission, can be found at: realclimate.org/index.php/archives/2008/03/venus-unveiled Some of the comments also contain good info, but there are,a lot of them. >200. If looking for more, or different info, Try a site search for Venus. Quite a lot there. From its Domain Name, this info, is probably, not what you would expect to find here. Clive Ballard
Mar
30
comment Helium plasma in space and its properties
You are right. Certainly explains why I could not find anything WITH regards to Lab tests on Helium plasma. I certainly got my wires crossed. Actually, there seems very little info out there, relating to the properties of Helium plasma, though there is plenty, relating to the use of Helium plasma in industry, which is not what I was looking for.
Mar
30
comment Flying a toy helicopter inside an accelerating train
Please see also: physics.stackexchange.com/questions/4837/…. low mass in a train, and in the air. also physics.stackexchange.com/questions/3863. High mass - Man - but distorted by being in space. Different forces.
Mar
30
comment Flying a toy helicopter inside an accelerating train
In my first post to you, replying to your original post, I asked you "Can you elaberate on "Psuedoforces crop up" please". You have not done this. What specifically in this instance, are these Psuedoforces and what is the force they are exerting. Not the theory, but in practice. JohnRennie's answer talks of wind blowing through the train. Is this one of your Psuedoforces. Modern trains are designed not to have winds or even drafts blowing through them, even when accel'g. I am not saying the HC will not move, but that the movement will be relatively small. What is your position? See next answer
Mar
30
comment Flying a toy helicopter inside an accelerating train
@Manishearth I was using Newtons laws in respect to your comment with regards to being pushed into your seat. IE The trains accel'n is greater than your accel'n. I also stated that passengers could not be taken into the air frame set because of their mass. The HC is not on the ground, but free in the air, and similar to your ground example, will accelerate with the air. It all hangs on HC's mass. We will have to agree to disagree, but I still think your comment & negative point re my original logical comments, were unjustified. Angelo Make sure there is no air flow though the van. Regards
Mar
30
comment Helium plasma in space and its properties
Thanks John. What I am really looking for, is a theoretical, like for like, of the 2 states. The lowest temp. found in the Universe is <1K well below He's Lambada point. If the 2 types of He, were together at this temp, would the plasma be a superfluid & supercondutive. As you say, He is easy to ionized here on Earth and the non plasma type is regularly taken to <1K in Labs. I cannot find any records, of similar Lab tests on plasma.- An aside - I also started programming on a Commodore Pet - Purchased on their release date, 1st Oct, 1983. Regards
Mar
30
comment Flying a toy helicopter inside an accelerating train
Thank you for your reply. I ran out of space with my previous comment,otherwise I would have added that the passengers could have their own inertial frames, but these cannot be added to the set, because in general there mass, will be significantly greater than that of the air or HC.Mass as related to inertia of a body can be defined by the formula F=ma Here F is force, m is mass, and a is acceleration. By this formula, the greater its mass, the less a body accelerates under given force. The body mass slows its acc'n with respect to the train. Friction overcomes any small lost acc'n in the HC
Mar
30
comment Helium plasma in space and its properties
Thank you. Yes I am aware of that, and also that Helium's electrons are no longer bound to its nucleus. There is information about, and comments that suggest, that there is a big difference between these two Helium states. Trouble is' I can find little info, except with regards to Helium plasma's, superconductivity. Is this the only big difference? I know the properties of atomic Helium. What I can't find is the properties of Helium plasma.
Mar
30
asked Helium plasma in space and its properties
Mar
29
comment Does Helium just naturally display BEC properties at <1K, or does it become a BEC?
Thank you for your answer. What I was trying to establish is, which elements, if in a natural state, (IE not lab conditions, but say in outer space) would form BEC's.Your answers confirmed my conclusions with regards to He. With regards to H and Ne, I take what you say with regards to their trile point, but I have a table, which shows that at 0.1atm press, the vap/liq point of H is 2.5066K. Being from webbook.nist.gov, I did not check the TPt of H,and assumed that at the press in outer space (< 0 atm) it was likely that H and possibly Ne, could, both form a BEC state. Regards CVB No more space
Mar
29
awarded  Supporter
Mar
29
comment Flying a toy helicopter inside an accelerating train
I agree entirely with what JohnRennie's says, but to a lesser extent with regards to forces involved. Can you elaberate on "Psuedoforces crop up" please. Since the mass of the air and helicopter are so small relative to the trains mass, they can all be in there own inertial frames, but since they are moving at constant velocity with respect to each other, they can make up a set in one frame. The front of the carriage is accelerating at the same rate as the back of the carriage, so the air is moving at the same velocity, as the carriage. Frictional forces will hold the HC&air together nospace
Mar
29
answered How do levers amplify forces?
Mar
29
answered Flying a toy helicopter inside an accelerating train
Mar
28
awarded  Teacher
Mar
28
answered Where can I find open-source weather forecast software?
Mar
28
awarded  Student
Mar
28
asked Does Helium just naturally display BEC properties at <1K, or does it become a BEC?