TonyMcC

If,and it's a big if, the turbine can generate more electricty than the compressor requires then this energy must be derived from the sun. The generator will have to produce enough power to overcome losses in the system as well as driving the compressor before any useful energy can be extracted. Can it be more efficient than a simple solar panel? I have my doubts.

When I was at school we called static friction stiction with the idea that to some extent two stationary surfaces will stick together. Depending on smoothness this could be due to humps and hollows (rough) right down to atomic bonding (very smooth). Stiction was found experimentally to be greater than friction between two surfaces in sliding contact. Out of interest I have just googled "stiction" and apparently the term is still used.

Here is a little observation that may help if you think about it. Everything you connect to the mains in your home such as TV, fridge ,freezer etc. gets the same voltage (the mains voltage which is 240V in UK). This because everything in your home is connected to the mains in parallel. However the more items you plug in the bigger will be your electricity bill. This is because each item takes current and the mains supply has to provide the sum total of all of the currents.

ajb - how about writing about irrational numbers and how they often find their way into scientific calculations via certain square roots? Also of course irrational numbers such as pi.

tomgwyther said- (cat's eyes work on straight roads). This is true although they also work on curves if some of the light from your headlamps hits them. They are constructed internally so that rays of light leave the cat's eyes parallel to the rays entering. Not much to do with the paint discussion but I thought it worth mentioning.

Electrons quite easily move from one place to another. One example was the fear that a moon landing would cause a rush of electrons into or out of the space craft due to potential difference between the moon and the craft. Every time you touch something at a different potential to yourself you either gain or lose some electrons. Are electrons extremely long lived as the creation of electron - positron pairs and the mutual cancellation of electron - positron pairs seem to be quite a rare occurrence. Could you, for instance, say that some of the electrons in your body may have existed in a pile of dinosaur dung?

My wife tells me that what she "saw" during operations to remove cataracts would certainly take some beating on the "psychedelic scale". Mostly beautiful flashing and moving pinks, purples and blues. I thought it might be an idea to ask others what their most psychedelic experience might have been, then thought better of it - lol ( I was a young adult in the 1960's).

walshy, if you are for real you seem to have a great deal of interest in something you know little about. I don't know how old you are but if you have left school then you should seek out some formal course of study. In the UK that could be in a college of education, perhaps on an evening course. If still at school give maths and physics as much attention as you can. I'm sure you could find a lot of information on the internet, but realise that there is a lot to learn and get to grips with the basics such as simple circuits first as that understanding will form a foundation for more complicated things later. If you are for real then I wish you a bright future doing interesting work.

Green Xenon - Please take heart (no pun intended) from the following :- I retired at 55 with high blood pressure and coronary heart disease and am now in my 70's. There are very good drugs to combat high blood pressure - I take a mixture of 4. There are some simple procedures available today to unblock clogged arteries - about 10 years ago I had a stent fitted in one of my heart's arteries - a very straightforward procedure carried out without the need of anaesthetic. I don't intend to shuffle off this mortal coil any time soon!

dalgoma - I guess it's learn a little every day! What a strange thing drawing a circle at an angle is. Both a parallel projection and a perspective drawing, I now believe, produce ellipses. However if you consider a disc in front of you divided into two equal areas by a diameter and each half painted in seperate colours and tilt it away from you keeping the dividing line horizontal you will see the following :- The half further away will appear smaller with less depth whereas the half nearer will appear larger with greater depth. I would think it quite natural to assume this would distort the ellipse. However taking the disc as a whole the widest point of what you see is not the circles diameter, but a horizontal line forward of the diameter. This line forward of the diameter becomes a new major axis. I hope I now understand the situation - anyway I have enjoyed thinking about it. Thanks.

It seems expensive to produce. There are many ingredients that have to be grown in very controlled conditions without the "benefits" of pesticides etc. The ingredients need to be transported under very controlled conditions (ideally sterile). The production plant itself would need to be free of contaminants, ideally used for this one purpose only. Once on the market others may produce a similar item using ingredients not qualified as organic and not transported or produced under such controlled conditions. This would enable your competitors to produce a cheaper product which they could nevertheless advertise as a healthy product. I quite like the idea and can see it being used for famine relief or other emergency situations rather than feeding the general public, although the cheaper version would probably find favour with the "Authorities"

Sounds healthy - but very expensive to produce and would probably get boring enough to have you drooling at the thought of a nice steak!

I understand your confusion! I would read it as different people have a mixture of protein and other nutrients the ratio of which is unspecified. If you isolate the proportion of intake that is protein you will find 25 - 60 percent of that will be provided by cereals. I'm sure there are other interpretations! Best of luck

dalgoma - Do we agree that a circle viewed from an angle is seen as a distorted ellipse due to perspective?

I think when the result of an equation is irrational (e.g. square root of 2) geometry is the only way to express it. The fact that you cannot accurately measure the line that you so easily have drawn is another thing!

Sorry walshy - it's the best I can do - over and out!

Yes swansont, if you are looking for efficient reception using a dipole aerial. However just connect a lead as an aerial to the input of a cathode ray oscilloscope set to the a.c. input , turn up the sensitivity, and you can see the signals. As I understand it a changing magnetic field in space or air will always set up a changing electric field at right angles to it.

OK let's try to straighten this out. If you have a power supply RATED at 12V, 1A the MAXIMUM current it could supply continuously without it being damaged is 1A. It could light a 12V, 12W lamp. If you have a power supply RATED at 12V, 5A the MAXIMUM current it could supply continuously without it being damaged is 5A. It could light a 12V 60W lamp. If you have a 12V power supply which is actually DELIVERING 1A then it is forcing 1 coulomb of electricity per second through a load which could be a 12V, 12W lamp. If you have a 12V power supply which is actually DELIVERING 5A then it is forcing 5 coulombs of electricity per second through a load which could be a 12V, 60W lamp. A coulomb is a huge number of electrons(Approx 6.25 x 10^18) and 1 coulomb per second is 1A.

Any conductor carrying alternating current will radiate EM waves at the same frequency. For example you are subject to EM radiation at 60 Hz (USA) or 50 Hz (UK) just by being in your home.

Sorry Michell - I hadn't noticed that yours was a reply to Dalgoma. Bit sloppy of me. My comment was also really for Dalgoma.

I think you misunderstand me. Any circle looked at from an angle will not look like a true ellipse. An artist would need to be aware of this. Engineering drawings are not drawn in perspective and I'm sure your method could be helpful to engineering draughtsmen or draughtwomen. Go to http://www.drawingcoach.com/1-point-perspective.html for an explanation.

Can I make an observation? If you are making a calculation based on angle moved using the centre of the globe as the point of rotation and converting that angle into distance around the globe you are actually finding the distance between two points lying on a great circle. I am not really into mathematics but if I had to work this out I would go along that path (no pun intended!). If I can make another observation which I feel must complicate the calculation it is :- Lines of longitude are great circles, lines of latitude are not.

I think you will find that drawing a circular surface tilted away from you leaves you drawing a distorted ellipse due to perspective. This effect is usually ignored in engineering drawing.

I'm sorry but you are getting a bit out of your depth here. I'll just say that touching 200V would certainly hurt - in fact may well kill you. Touching 1V would be unnoticed by you. The reference to 200A is immaterial as The "force" of 1V could never force that amount of current through you.

Rather simplified - but yes.