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Messages - syhprum
« on: 05/03/2014 22:58:25 »
I don't think aliens wishing to take over another planet would be much concerned with the history and culture the present inhabitants they would either be enslaved or killed like it has happened on Earth when technologically advanced nations have advanced into new territories.
« on: 02/03/2014 19:11:39 »
In the extremely unlikely event of vehicles visiting us from an alien intelligence I cannot imagine they would remain unidentified for long they would have to carry communication equipment of considerable power to send back data to their home planet which would be quickly monitored by our deep space network.
the orientation of their antenna or lasers would give a clue as to from whence they came.
They could of course carry data recorders to be read out when they return but their controllers would need some indication that they had arrived.
« on: 02/03/2014 05:19:33 »
I can only guess at the electronics within a CFL lamp base but would expect it to be a half bridge rectifier fed via a capacitor feeding a chopper chip.
there would probably be another capacitor directly across the input terminals to reduce radio interference.
This capacitor could have gone short circuit or the feed capacitor could have shorted and burnt the rectifier down to a very low resistance.
If the tube had failed the power consumption would be very low
« on: 28/02/2014 14:14:13 »
I read on the internet of a student misappropriating time on his universities large computer installation to mint Bitcoins, the result he has now been barred from all access to the system .
It is simply a matter of distance gravity varies as to the mass of the attracting bodies but according to the inverse square of the distance between them so that while the mass of the Sun is some million times greater than the mass of the Earth being at a much greater distance and considering the inverse square law its influence is much less.
« on: 17/02/2014 20:36:41 »
As a practical source of power I have always considered ITER type fusion reactors a wild pipe dream what can we say about laser types they make ITER types mundane and practical in comparison !
I remember well when the Sellafeild Plutonium plant was coaxed into producing 20GW we had he worlds first revolutionary nuclear power station.
Laser fusion can only be a thinly disguised military project as for producing power its nonsense.
« on: 12/02/2014 10:48:02 »
Much as I would have liked to take a trans Atlantic trip on the Hindenburg I very much doubt that I could have afforded it , I wonder what the cost was in modern terms
« on: 09/02/2014 14:45:51 »
It is rather a problem to display the internal temperature of the food with a thermometer that is in place while the cooker is actually operating I can visualise a gas filled probe with a pressure measuring dial calibrated to indicate temperature all constructed of PTFE or some other temperature resistant plastic that could just about be read thru the front gauze of the machine but I don't know if such a device is available
Treatment for allergies by the administration of progressively increasing doses of the offending substance is nothing new I had such treatment for asthma in the thirties and snake charmers are reputed to render themselves immune to cobra venom by a similar technique.
« on: 01/02/2014 14:22:34 »
"There might be, or there might not be, gravitational waves"
I did not think there was any doubt as to the existence of gravitational waves simply that detection is very difficult because of the very low frequency very low power of any nearby sources.
It is calculated neutron stars in close orbit would be emitting 100 times the energy than a star such as the sun emits in the electromagnetic range but it would only be for a very short time before they merged into a black hole.
if it happened nearby we would certainly detect it !
« on: 31/01/2014 21:09:34 »
The only vaguely intelligent answer I can give is how much energy is given out in the form of gravity waves I under stand Jupiter emits about 25 Watts !
Next time I fry eggs I will fix the pan 10 cm above the hot plate with a fan blowing away the hot air stream so that the pan is only heated by radiation.
Then after measuring the temperate of the hot plate and assuming that it is an isotropic black body radiator and that the pan is a black body absorber I will need only the radiation spectrum of the CFL lamps to calculate the nominal wattage of them that I will require to produce a similar result
I assumed that the radiation would heat a pan that is why I specified a well insulated one made of good conductivity materiel with near black body characteristics once the egg got partly cooked it would turn white and reflect the radiant heat.
Maybe the pan should be allowed to heat up before the egg is dropped into it
PS has anyone else had trouble using ALT248 as degree
For some strange reason I cannot enter this reply as text so I sent it as a PNG!
Even when I try to add it as a modification!
We have to set up a lot of parameters before we can do any calculations let us assume the egg is sitting in a pan of approximately black body characteristics insulated from its surroundings one meter from the source of radiation and we wish to heat the pan to 127 degrees centigrade I would think if the colour temp of the radiation was similar to Sunlight we would need about 2KW/m^2 but without knowing the radiation spectrum of CFL lamps (which is not ideal for this purpose) I can proceed no further.
It seems it does not like this short section of text "400 (alt 248) K
« on: 25/01/2014 21:39:30 »
When I was fixing TV,s for living I came across one case where the neutral line had failed on the three phase star connected 415/240v domestic system so that the voltages varied wildly as people switched different loads on, I broke the rules and connected the neutral to ground to avoid the TV getting destroyed.
« on: 25/01/2014 15:58:19 »
The crash bang modern films always show the small cylindrical transformers mounted on poles that are such a part of the American scene exploding, what is the typical KVA rating of these transformers ?, to an European the configuration of the system seems rather strange with the centre tap of one of the 220v delta three phase windings grounded to provide two 110v supplies to domestic users.
Would un-grounding this centre tap help the solar storm situation or would dangerously high voltages be fed into the neutral line of domestic users.
(perhaps they would prefer a risk of shocks to losing their power)
Could the connection be left un-grounded until a modest and safe voltage builds up and then a relay or Zenner diode device could close to bleed the current off.