Current Carrying Capacity of cables with different voltages

[D Skelton]

But we know a link doesn't exist between wider quantum theory and relativity (the minutely small and the infinitely large) because one of them (at least) is fundamentally wrong, we know this to be the case but the reason we still use both theories is because they fit what we need them for. Christ we still use newtonian theory even though we definitely know that is wrong. Science is about using what you have until you find something better or more suited to your needs.

 

[Darkwood]

We could always follow the bible bashers ... at least every question can be answered the same ... cos God made it that way!

I had 2 bible bashers at my door so i explained im an Athiest .... they ask me why im an atheist to which i replied 'Because god made me this way' .... their faces were a picture lol

 

[Tiny Spark]

Blaggedhead.org

 

[D Skelton]

I live right next to a Jehova's witnesses kingdom hall and used to get them at the door all the time when we first moved in. They always used to introduce themselves to which I'd always reply with one word... 'Dinosaurs!'

They've stopped coming round now

 

[Mr Hehound]

What's more, we also know either our current quantum theory or our theory of relativity is wrong, maybe even BOTH, so essentially we're all basing our sums on something which is a coin flip at best!

This is why physics is so ace. It evolves as we learn more.

I often lament that its a shame the young have to decide what to study before they're really old enough to understand how interesting some subjects are regardless of whether they're hard or mathmatical.

We'd have alot more physicists and engineers and alot less media studies graduates than we have now.

 

[Darkwood]

If i listened to my school Physics teacher i'd be crap at my job.. i saw him 15yrs later and asked him some indepth physics questions and he could't respond and then ask why we were taught that there was only 3 states of matter ... he said that they was the important ones ...i said they only accounted for less than 3% of the states of matter in the universe and he negated to express that almost all matter was composed of a 4th state............

Ive hated dumbed down teaching ever since ........... its Santa clause and the Tooth Fairy for graduate .... SAD!

 

[Mr Hehound]

If i listened to my school Physics teacher i'd be crap at my job.. i saw him 15yrs later and asked him some indepth physics questions and he could't respond and then ask why we were taught that there was only 3 states of matter ... he said that they was the important ones ...i said they only accounted for less than 3% of the states of matter in the universe and he negated to express that almost all matter was composed of a 4th state............

Ive hated dumbed down teaching ever since ........... its Santa clause and the Tooth Fairy for graduate .... SAD!

Gas plasma? What is it you do?

Think the teacher thing varies tbh. Some good some bad. Until university level they're a bit ham strung by limitations of the syllabus they are told to teach I think.

 

[Darkwood]

Yep PLASMA ...

I repair, upgade machines, design control systems for machinery and industrial electrical installations mainly but can backtrck to the simple stuff to fill the day if need be.

I know what your saying with the teacher thing but it still get my rag that they still teach the basics wrong because its easier if they taught the real world of physics it will weed out the not so intelligent and promote those genuinely interested rather than just keeping the pass rate high and filling the country with numpties.

I went in my old school the other day and was shocked to find a large poster on the wall showing the '9' planets of the solar system not the 8 as we know now...pluto was downgraded several yrs ago but the school literature has been changed due to costs... the teacher explained they are now told the books are out of date so i said ok but isn't it sending a confusing message to have the out-dated posters up ...think he got my point

 

[Tiny Spark]

Fully agree darkwood.
Whats the point of having a A* in science and a high pass rate if everything you are taught is wrong?

Ide rather be taught right first time round and not have my head filled with lies and dumbed down stuff.

It only seems like yesterday I was leaving school (11 years ago) but the gaps in knowledge between what I knew at 16 and the young apprentices we take on seem to be huge.

We even had to teach 1 lad how to use a calc so he could attempt his lvl 2 key skills maths exam!!

 

[Darkwood]

They use calculators now!!!! OMG what next virtual holograms to tell them all the answers they don't know:banghead:

 

[Tiny Spark]

Not very well seemingly Darkwood so I wouldn't worry to much....

On the other hand think everyone needs to....

PANIC!!!!

 

[All4One_One4All]

300,000m/s

A little knowledge is dangerous, and you have demonstrated that little knowledge. Each electron moves one place at a time, and there are billions and billions of them all queued up like traffic on a 5-lane motorway start stop traffic jam (except there are millions of lanes above and below and well as to the left and right, and the cars are really floating. One can only move forwards when the car in front has moved, and it can only move when the car in front of it moved.
Unfortunately, humans thought electricity was due to positive things, and it turned out electrons are negative, so just to confuse you further, the cars move backwards, as if in reverse, but don't assume that's the reason they move quite slowly. The analogy falls down here! So next time you look at a torch battery, remember the electrons come out of the -ve terminal and flow round the circuit to the +ve terminal!

 

[Darkwood]

A little knowledge is dangerous, and you have demonstrated that little knowledge. Each electron moves one place at a time, and there are billions and billions of them all queued up like traffic on a 5-lane motorway start stop traffic jam (except there are millions of lanes above and below and well as to the left and right, and the cars are really floating. One can only move forwards when the car in front has moved, and it can only move when the car in front of it moved.
Unfortunately, humans thought electricity was due to positive things, and it turned out electrons are negative, so just to confuse you further, the cars move backwards, as if in reverse, but don't assume that's the reason they move quite slowly. The analogy falls down here! So next time you look at a torch battery, remember the electrons come out of the -ve terminal and flow round the circuit to the +ve terminal!

Thats DC ... AC has no net migration of electrons but the electricity arrives at close to the speed of light just to add more confusion

 

[Silly Sausage]

Or the positive 'holes' migrating from +ve to -ve!

 

[Tiny Spark]

Somehow I think the student has been scared away....

Cant say I blame him LOL