Recent content by sophiecentaur

Use gears instead; no significant friction involved.

Series connection is less problematical but there could still be a problem if one of the batteries runs out of useful charge because the are circuits which could produce reverse volts across the duff cell. This would need to be spotted with a voltage alarm / disconnect switch which would be...

So one should avoid using "common language" in important situations. There's a similar sloppy way of talking when people say "ten times less" which can result in misunderstanding. My dear old Grandad used to ask me 'what's twice the half of one and a half?" I read, recently, that a burger chain...

'Repeating'? Probably not because musical instruments (except Hammond Organs) do not produce simple harmonic sounds. If you take a few hundred cycles of the note from a musical instrument, you will probably see a fairly stable waveform but not across adjacent sub patterns. Contradictions are...

As you say, it's a very complicated business; your hearing system is very sophisticated and can drag out a lot of information about a source of sound and also your environment. Your hearing involves both frequency detection and timing difference between what the two ears receive. For continuous...

I think the far left hand diagram needs some explanation. Does the red (lets call it a) piston have precisely the correct mass to keep the vertical column at 2m or is it restrained from rising?; this must be specified before going any further. When M is lowered onto the piston, it will add a...

Caveat here: But an N3 pair doesn't imply equilibrium

and, I would say, best left alone for a discussion at this level. People look for loopholes, rather than go mainstream. DC circuit theory is DC. AC next week perhaps?

exactly ; metal. The path has to be 'favourable', meaning a finite conductance so there's no 'division by infinity' to give you zero current.

Not intuitive; I agree. But other numbers count too. There are zillions of molecules involved in diffusion between / within parcels of air. Most of our experiences of what a Science Teacher would call Diffusion (smells that drift around the room) do not involve stationary air.

I think you have failed to grasp what Maths is all about. Maths represents the relationships between variables; it is a model. If you don't define the terms then the Maths is meaningless. You have leapt into this discussion without having learned the meanings of the terms you are using...

Who 'taught you' that?

You can! When I first learned GCE Statistics we were introduced to the concepts of Permutations and Combinations. It seems to me that your question revolves about this. The probability of a result is the ratio of the possible wanted result to all possible results. There are many hits from a...

There are formulae and there are basic principles which can often be expressed by formulae. To understand and know a basic principle it is necessary for you to be able to put names (words) to the basic symbols that a shorthand formula tells you. Do you carry and use a map / gps with you when...

Try again. ‘Trans’ = frocks.