Recent content by sophiecentaur

The design in #25 is balanced (in theory, at least) so there should be no spurious current to flow down any other 'earth lead' to upset the sensitivity pattern or effects from local E fields. Equal and opposite currents flow in the inner and inside the screen of the coax with none on the...

I totally agree.EM is multi-layered. I had an advantage of a 'strict' basic physics education. We would accept a model and get familiar with the basic equations. No messing about with photons, electrons and more subtle levels in lower school. If we asked about stuff like that we were told that...

It may be worth introducing the Energy situation. The inductor's magnetic field has Energy and the E field across the capacitor has Energy. The rate of transfer of Energy depends on the induced emf in the inductor. Total energy remains the same unless a resistive element is included in the...

Oh yes. No current initially defines the max voltage

Only if the system starts with no current. i.e. appropriate initial conditions That may have been assumed.

I wondered about that. You do need a lot around reactors. Yep; no directionality at all.. All the chips are probably equally sensitive, I guess. It's just that the sensor chips have amplified outputs and low threshold energy. And there will be more non-light sensing chips than specific light...

Agreed. The analysis really has to be tackled formally and with maths (of course). The initial conditions are whatever is stated (and they must be stated). IMO, there's no point in just chatting about the situation, except when it comes to describing what the 'graph' tells you. The "max...

I have tinkered with machining metal for several years. Bending and flattening steel can be done without a forge but that takes you up a notch. If you have little experience of hot working then I'd seriously suggest you start off with a scaled down version. One heavy hammer, a hefty pair of...

Time was that everyone used a 'play pen' for their kids (I did, with two separate batches of kids) but now they seem to have lost favour: "cruel and unnatural punishment" (lol) by the Woke. Likewise with the reins that all kids used to be 'controlled with. I'd comment that the 'pen' is a bit on...

I'm inclined to agree. The detector will be omnidirectional as there's no 'optics' involved so the position of dots can only be governed by the time of arrival of a particle with respect to the scanning system. Interpreting what you have detected is a subtle business. To get directivity, you...

Thanks. First question: Which way will the water be admitted? Through or round the sides of the piece with the balls? Second question: What are the balls for? A detent mechanism?

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...