Physics test

I failed this at GCSE when I was 16. A further 24 years hasn't helped. I got rated as a "power cut"

http://news.bbc.co.uk/1/hi/magazine/4308292.stm

 

I'm a half life - now you can see why I just dropped physics

 

HAHA..that's quite the insult...."half life"

 

me too
and the whole brit. blue/brown wire thing messed with but,I got it
green is always ground(or earth)where ever ya are

 

8/10... live wire. But I guessed on the wire color designation question, so just should have been 7/10

 

To be honest, if I didn't get 10/10 I might have had to jump off a nearby bridge.

Oh and the plug wiring - the idea is that anyone can work it out (blue neutral, sounds about right, green/yellow earth.. also sounds about right), so thats less physics than logic

 

A mere half-life, here. It`s been QUITE some time since HS Physics. I wracked my brain and 5 of 10 was the best I could do on one attempt. I don`t know if I should be upset because my memory fails me or should I rejoice in even the smallest of remembrances. (Burned tonsa brain cells back in HS) HEH HEH HEH

 

5/10 half-life

 

9/10 i missed the weight question

 

Missed the smoke detector.

 

10/10 - Most of them were more logic than Physics (no real formulae needed, more reasoning), i.m.o.

Knew my PhD. would come in handy for something, LoL!

 

Can I borrow it sometime?

 

I quit the test after i saw meters and kilograms.

 

I always knew I hated physics..

 

As far as I know, pretty much all physisists use SI metric units... it makes things so much easier.

I mean, how many volt-inches is the electrical field strength in your monitor? I have no idea but to work it out you'd have to do some REALLY funky conversions. The definition of a volt is kilograms meters^2 seconds^-3 amps. Entirely based in SI metric units.

There isn't really any getting away from it. Physics is (for all calculational purposes) ... metric.

 

When I was taking my physics class (which I passed by the skin of my teeth, only because the teacher really liked me!!) I couldn't help but notice...it seems as though physics goes against all reasoning and common sense...and being that I am one of those that are VERY logical in the way they think...I had a hard time with that class!!

Roger

 

see, thats what I thought. .seems logical
but here,in th US
green is ground/earth
white is common/neutral
black is hot/live
but then there is 480v wiring,3 Wire Non-Grounding,High voltage delta, 3-wire primary 480V wye, 4-wire secondary with grounded
neutral


so many wires

 

I think we used our system of measurement in my physics class.

 

So you didn't use volts, joules, amps, coulombs, ohms, hertz or kelvin either then?

As far as I know the only place for imerial measurements in modern physics is for the sake of relating to them. For example, you might be able to relate better to how much two pounds is rather than a kilogram, or 3 feet rather than a meter. As soon as you start doing calculations, metric makes a whole raft of standard units accessible.

Of course, the laws of physics still apply - unit mass is still unit mass, no matter what it is measured in. Unit current is still unit current, etc.

The great advantage to metric is that they can all be described in terms of their basic unit, with added powers of ten. e.g. a milimeter is 10^-3m, a kilometer is 10^3m, a gigameter is 10^9, a yottometer is 10^24m

jarcher - Thats interesting... black is normally associated with neutral or negetive pole here. Previously, our colour scheme was red live, black neutral, green earth, but we changed it for the sake of red green colour blindness. Blue, brown and green/yellow are unmistakable to the majority of colourblind people. The yellow stripes on the earth were introduced to remove ambiguity between blue and green. Of course, there are a raft of other standards too, particularly for high tension power supplies which are of a totally different calibre, since most have 40 or more wires for the sake of safety and load management.

 

Incidentally, for a fun fact - did you know that the measure of angles in SI is radians and NOT degrees! Degrees are defined in SI as 2x Pi /360.