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- So sunlight passing through water droplets in the air are diffracted by (slightly) different anglesIn the case of rainbow, it is refraction instead of diffraction which produces color separation.
- This separates out sunlight into its constituent rainbow of colors
Here's an interesting exercise, at what velocity do you have to be moving towards an observer to see their watch ticking at the same rate as yours after taking both time dilation and Doppler shift into account?Any non zero longitudinal speed will generate different magnitudes of Doppler blue shift and time dilation which don't cancel each other.
Professor Patrick Stokes of Deakin University gives a thought experiment from Thomas Nagel. This comes from a talk given at the Ethics Centre from an episode of the podcast The Philosopher's Zone.
Superheated water can be produced in pure water, in clean vessels without nucleation sites, and as long as it is not too agitated.
- So mechanical heating/stirring would not be a good way to do it
- Pure water is not very magnetic, so magnetic heating would not work so well
- Pure water is not very conductive, so heating by electric conduction would not work so well
- Inductive heating of a clean metal vessel could work
- Infra-red radiation (eg inside an oven) would work well
The water can be regular drinking water but should notErné, B.H. & Snetsinger, P. (2000). Thermodynamics of water superheated in the microwave oven. Journal of Chemical Education
contain many undissolved particles. It can be heated in any
domestic microwave oven; a research-grade microwave oven
such as used by Kennedy (1) to determine the enthalpy of
vaporization of liquids is unnecessary here. The recommended
heating vessel is a glass teapot sold to be used in the microwave
oven (no metal parts). Using such a teapot generally has several
advantages: its walls have relatively few nucleation
sites for bubble formation, yet enough to put a reasonable
limit on superheating; it has a plastic lid to prevent boiling
water from splashing out of it; and it has a plastic handle so
that it can easily be removed from the microwave oven once the
water is boiling.
Steven Spielman, PhD in Applied Physics; optical properties of solidshttps://www.quora.com/How-likely-and-how-dangerous-is-superheated-water-in-a-microwave-oven-and-what-everyday-precautions-should-be-used-to-avoid-injury
Updated Mar 4, 2019
I was able to accomplish superheating without much effort. I heated water in a small glass bowl, in a microwave oven. Before it reached boiling, tiny air bubbles adhered to the glass, the result of dissolved gases coming out of solution. When the boiling point was reached, (presuming here) water vapor entered these bubbles without bound and they grew quickly. The water boiled normally.
I shut off the microwave for a few seconds, and the boiling stopped. Then I turned it on again. The dissolved gases have already been driven out of the water, so there would have been no air bubbles to get things started. The water just sat there quietly for 10 seconds or so. Then there was a “PUNF!” sound. I opened the oven to find the bowl mostly empty and the walls and ceiling wet.
So, to avoid it, don’t microwave water (including coffee, etc.) which has recently boiled. Keep your face away when you first disturb it with a spoon or sugar.
Eddy-current testing (also commonly seen as eddy current testing and ECT) is one of many electromagnetic testing methods used in nondestructive testing (NDT) making use of electromagnetic induction to detect and characterize surface and sub-surface flaws in conductive materials.
It wasn't me who wrote that. I have the same experience as this not so long ago. I checked and found that it occurs when you select someone's statements but then click someone else's action button.I consider this as yet another great evidence that the electric current flows de facto from the Plus to the Minus-pole of the battery.It doesn't indicate anything like that.
Since here it is not allowed to post external links, I can tell only to search for my full name and you will find my book on academia edu (pages 23-26).I think you should create a new topic in New Theory section due to policy of this forum. You can explain your theory in more details. The topic of diffraction and magnet deflection can be discussed in separate threads. I've made extensive experiments about light diffraction and share them here https://www.thenakedscientists.com/forum/index.php?topic=66301.0
I have posted originally there this interesting experiment I came across recently in the book Physik, Band 2 from the author Hermann von Baravalle (pages 83–84). Look at the setup below.I think I can try to repeat and verify the experiment and then upload it to my Youtube channel.
When high DC voltage is connected to it, then sparks start to jump across the upper part of the circuit.
As soon as the poles of the voltage source are reversed, then sparks start to jump across the lower part of the circuit (drawing below).
The two different ends where the sparks jump are a thick sharpened wire and a metal plate.
I consider this as yet another great evidence that the electric current flows de facto from the Plus to the Minus-pole of the battery.
Interesting. My experience using clamp meter never show difference in Ampere reading due to cable size. Where can I download your book? Which part of your book contains this particular experiment?Alas no. The current is the same in both wires, so the magnetic field is identical outside the wire. The current density is greater in the thinner wire but you won't notice the difference unless the thicker wire is much wider than the length of the compass needle.I speak on basis of experiments. What experimental evidence I have for my assertion about the deflection of the magnetic needles you can read in my book, which is downloadable free of charge.
I watched as single photons passed through a single slit producing a single bar pattern.I believe this only happens in simulation, never really happens in actual experiment. The images below show what you'd get from single slit and double slit experiment.
The "hump" is 180 degrees of one frequency.Please read this
No i am a retired engineer, with very little science, & not much math. I like to have an intense interest for a few years & then move on to something new, & at present my main interest is aether (which requires that i try to understand the enemy (Einstein)).I am very impressed & awed with~by the intelligence of scientists, oldendays & modern, & wish that Einsteinism be quickly dumped so that science advances. My heroes are Cahill, Ranzan, Crothers, Demjanov, Michelson, Miller, Sagnac, Ives, Lorentz, Wallace, Builder, Dingle, Arp, VanFlandern, Allais, Esclangon, Munera, & about 20 others.I think this youtube channel has some materials you might find interesting.
Johann Mahne asked the Naked Scientists:They will pass through each other in this case, as if nothing is coming from the other end.
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If the waves are running from both ends of a rope,then after they collide the rope will have no ripples.
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Regards
Johann
What do you think?
So, since I don't have sisters, and my mother's sisters didn't reproduce, and I only have sons who have sons am I to understand that whatever of me is physically present on this planet will not continue further? In other words, my only chance of a specious immortality is negated by biology?You can donate your mitochondria, like in this case :
Okay thanks guys, the crux of what im getting at is this. Say theres 120v between line and neutral, this potential difference causes current to flow, normally back to the supply transformer through the neutral (which is at earth potential 0V). Okay I get that. So in a live system there is current flowing through the neutral right, so why do i not get a shock if im standing on the ground and i touch the neutral, because there is still current going through it isnt there !!the neutral is usually already connected to the earth by the utility providers.
I suspect it has something to do with the fact that there is no potential difference between the neutral and earth (that im connected to via the ground in this instance); so in that case there is no voltage between neutral and earth, but there is current flowing through the neutral from the live 120v. But i cant feel this 120v if i touch the neutral while im standing on the ground !!! WHY IS THIS PLEASE HELP