As an electronics tech I suggest actually measuring the resistance of the plumbing. I’d use a static test of pressure with no water flowing, and a further measurement with the tap fully ON.
Does that make sense to the fluid dynamics guys?
So gravitational waves are waves of electromagnetic energy which come from some direction, weakly interact with matter, and move on.
You'd think that a massive sphere (say a planet) would focus gravitational waves much as a glass sphere focuses visible light, so that at some distance a...
This question reminds me of the problem that ancient mathematicians had with Achilles and the Tortoise, because their problem required the expansion of mathematical understanding to encompass the calculus - in other words the paradigm within which they attempted to get a grip on the...
I have found that the best teaching resources are at New Zealand/Australian "4th Form" level. Almost any modern book will do.
Usually, the most trouble people have is learning the meaning of division.
Good luck, and feel free to PM me if you have any further questions.
Thanks for your question Ranger Mike :)
I have very little money, being a pensioner.
The design I'm using is one I cooked up for myself in the olden days (ended last week) when I believed that lasers just continuously lased, and did not continually restart as seems to be the case.
Hi people :)
I want to build an interferometer.
In the course of looking for a suitable light source for my instrument I have been advised to check the 'coherence distance' of the sources; it is clear to me that this distance places practical limits on the design of the machine. However...
Hi Litup! :-)
are you still looking for ideas?
I suggest ultrasonic 'radar'. You could pulse a burst of 40kHz sound, time the received signals, and locate the nearest item using Arduino.
I hear that the Arduino platform is very good for this kind of work, and is very cheap. There will be a...
I have heard that there are often conflicts when a soundcard is used for both input and output simultaneously. I might look for a way to resolve those conflicts or include a second soundcard.
I found this: http://chipmusic.org/forums/topic/638/lsdj-to-mp3/ which may help...
I've been turning this over and over in my mind and I just don't see why a laser should be required. It seems to me that a Young's double slit should work just as well, with no dangerous lasers. Perhaps I got that wrong?
Still, I'm sure the professional systems use more than 1 detector, otherwise they wouldn't be able to detect the sense of any movement - whether it is towards or away from the detector.
I've made a small advance in understanding. If just 2 detectors are 1/4 wavelength apart the...
Idea for a microphone.
I've had an idea for a monochrome light microphone, which I have rendered as a drawing, attached.
The detector consists of a monochrome source (l.e.d.), a reflective membrane (gold leaf) some distance from the source, a static reflective...
Hi "Disconnected" :-)
what level of question is this, please?
If you want to know about how amplitude modulated signals are generated that's not so hard for me to answer - the voltage fed to the aerial is modulated by electronic circuits so that more or less energy is fed to the aerial. I can...
Perhaps impurities in the Gallium are causing a microscopic lumpiness in the surface of the droplet? That would give several reflections a chance to be cast onto the one point on your wall.
If this is so you might be able to find a way to push the impurities around and so change the pattern...
Hi again Blake 2
I still think that resonance may be an important part of the phenomenon.
Imagine that a single-frequency sound is being generated by a single speaker in a room with a slit. If the walls are reflective of sound, there will usually be a path for sound to bounce around the...
I have an excellent test-equipment design I want to share with you because it will enable you to track down your fault.
It needs parts : 2 of 12v filament lamps; a mounting arrangement for the lamps, and a probe. Oh, and red and blue paint.
Connect the 2 lamps in series, and connect the...
Perhaps op-amps would be a good thing for you to look at more carefully. With op-amps, all kinds of mathematical OP-erations can be realised, hence their name.
Integration of a voltage wrt time is easy with op-amps, all you do is convert a voltage to a current and collect the charge on a capacitor.
You seem to be asking whether lots of inputs can be logically combined to give a single output.
The answer to that question is "Yes"'.
Ripple-through logic is an important method of machine control, though it has largely been superceded by microprocessors.
I'm not sure whether Matlab requires that you define your variables before attempting to execute them, but I see that line 4, for example, (I0 = N0*q*Va/Tn;) contains several variables you do not define until later in your routine.
Sometimes a diagram of the problem helps visualise the solution.
Draw the ferris wheel, add a line 125 feet off the ground, and find out what angle of rotation will bring the passenger to that height.
I have to stop now, and leave you with something to do!