Physics

*The Wow signal lasted just 72 seconds and was 'unusual' and has yet to be traced *This led many to theorise the signal came from an intelligent alien civilisation *Amateur astronomer Alberto Caballero has been searching the Gaia catalogue *This catalogue contains details on 1.3 billion stars from around the universe *He found a Sun like star in the region of space the signal is known to originate Source: https://www.dailymail.co.uk/sciencetech/article-8985997/Amateur-astronomer-traces-possible-source-notorious-WOW-signal.html

I've always been extremely skeptical of the Copenhagen interpretation. I'm aware of its use in explaining the probability distribution of subatomic particles, but the extent to which the idea has been taken, simply seems unrealistic. I'd very much like to see a mathematical/scientific proof of some kind which more adequately affirms/debunks the veracity of this interpretation.

This is an occasional activity from my childhood. Whenever my backyard would be filled with an abundance of snow I'd dive off the patio into the snow. I am curious now how much of a risk I was assuming when I did that. I didn't jump from a very high height, but I am curious now how the ability to be safely slowed to a stop by the snow; without hitting the ground underneath and without accelerating fast enough to injure myself; relates to factors like the wetness of the snow, the snow pack, and the snow depth.

So I'm trying to picture a scenario here. (Not a homework scenario, just a hypothetical I thought of years ago that came back to mind recently.) A bunch of people need to be rescued from a fire, but there isn't enough room in the helicopter, and the only thing attached to the helicopter they can grab onto is a spring. As they all leap onto the spring, the helicopter begins oscillating vertically; as in, they rise when the helicopter falls, the helicopter rises when they fall, etc. Presuming they didn't otherwise exceed the helicopter's weight load limit, would the vertical motion prevent the helicopter from achieving the kind of lift it would need to achieve i…

I noticed that the wave resistance of the vacuum is in some sense equivalent to the Planck constant where e is the elementary charge, alpha is the fine structure constant, and Z0 is the vacuum wave resistance What does this mean?

The Big Bounce - Quantamagazine I don't know if I'm understanding this correctly. Is there no upper limit to how large the universe can bounce up to or is the image misleading? Is matter a fixed finite or is more created at each bounce? If I view it as a series of warping bubbles moving through this multiversal vacuum space, at what point is everything so spread out that it just pops? If expansion is stretching everything further apart, how can another contraction take place if there is no force great enough to overcome expansion and pull everything inwards again for a bounce? Another thing I don't understand due to the image, does the universe have s…

So recently I've been putting olive oil in a spoon floating in boiling water in a metal dish so that it gets warm enough to put in my ears. I assume the oil will warm as the water transfers heat to it, then cool as the water cools, (or at the very least is not transferring enough energy to the oil to outweigh the rate at which the oil loses heat energy) but I don't know how to predict when the oil will hit its warmest temperature. I figure I could one day set aside the spoon and put a thermometer in boiling water in a metal dish (though I keep forgetting to buy an actual themometer) to gauge how long it would take to cool without having to heat up the olive oi…

Thx

It appears I cannot find anything that adequately explains Christoffel Notation and what it means. All I know is that it is used to describe the affine geometry of spacetime, and by extent in calculating spacetime geodesics; but I've yet to understand how, or how to use it.

Hello, With the cooler temperatures I noticed an interesting thing happening with my ceiling fan when I lowered the speed to the lowest setting while still pushing the air downward. During the summer this fan ran continuously on the highest setting with a little bit of wobble in it. With the the fan at the lower setting the wobble has increased so much that the pull chain now swings back and forth with enough momentum to connect with hanging lights. I suspect the cause of the wobble is due to one of the arms that attach the blades to the motor is slight bent, maybe causing a different pitch to one of the fan blades or there is a weight imbalance between the blades …

Just wondering why water should impede radio-waves. Water is composed of Hydrogen and Oxygen. Neither of these two elements, by themselves, seem to offer much resistance to radio-waves. For example, the Oxygen in the Earth's atmosphere doesn't prevent terrestrial radio stations from receiving broadcasts over long distances. And Hydrogen gas, which is present in large quantities on the planet Jupiter, doesn't prevent random radio-noise from that planet, being received over even longer distances by our radio-telescopes on Earth. This demonstrates that both elements are transparent to radio-waves. So why do Oxygen and Hydrogen when combined together in t…

Aircraft can be designed to travel at "supersonic" speeds through the atmosphere. Would it be possible to design a "supersonic" submarine to travel though the sea?

Disclaimer: I do NOT presently intend to actually attempt this myself, NOR would any future attempt at this myself hinge exclusively or even primarily on the direction of this thread. Obviously if I were to ever become a stuntman in the future I would consult with actual experts. For now, this is intended primarily out of curiosity. I do not recommend this for anyone without consultation with actual experts as even to a layman there are a bunch of obvious issues (debris on the road, tripping up and falling face flat on a moving road) that could go wrong. Suppose someone wearing roller blades, or riding a skateboard or bicycle, or whatever else (presume an abun…

Apologies if this is in the wrong space, I wasn't sure if this should be in engineering or physics. Is there a limit to how fast we can fly through the air. For example, will we one day have planes that can fly at mach 50?

So I was thinking about how long the earth core will remain molten and the how much power is produced by the earth's core compared the amount of energy earth receives from sunlight and what would happen if geothermal energy was overused, pretty straight forward, the earth's core solidifies and that led me to thinking about tidal energy, which is powered by the moon rotating around the earth. And what happens if tidal energy is overused. The tide ceases. But then I thought "Hmm there has to be something else being used up, otherwise that would just be providing far too much energy considering the moon's orbit won't finish decaying for billions more years. Can it really be…

Apparently the light speed barrier can't be broken by conventional means. Well how about in a case such as this? Lets say I've got a spaceship that goes at over half the speed of light. Now lets say I've got a gun that shoots a bullet at over half the speed of light. Now, Im in my spaceship and its going forward at maximum velocity. I fire my gun forward in the same direction the ship is going, would my bullet break the light speed barrier?

Hey guys! I have an Biology, Chemistry, Physics and Maths Exam next week. I have studied for it but they recently told us what is going to be on it. So is there any techniques or study method I could use to cram(?) before my test. I would also like to know what was most effective to u. Thanks!

Is or does the source of ALL have intelligence? Were the sources of energy or matter just coincidental?

What Moiré Excitons in Van der Waals Heterostructures mean in physics?

These two physics papers by the famous mathematician E.T. Whittaker involve manipulating the wave equation in a way consistent with Maxwell's equations, which are Lorentz invariant. Whittaker seems to posit that the electromagnetic field can be understood not only as a vector potential and scalar potential but as the derivative of two scalar potentials (two scalar fields) that form electromagnetic radiation by intersecting each other. Is it possible that this view of electromagnetism is somehow more fundamental than the usual one scalar potential, one vector potential? I don't know enough but I find it curious these papers were not studied more. Whittaker 1903.p…

I have an air dehumidifier and it has a water tank, if I turn off the dehumidifier at night and keep the water in the tank, will that water evaporate and oxidize the electronic part of the dehumidifier?

https://imgs.xkcd.com/comics/nerd_sniping.png So this XKCD comic got me thinking... can the resistance of an electrolytic solution in water can be modeled as infinitely many resistors of infintesimal resistance? After all, the distance between the ions of electrolyte is a discrete quantity, but so is the number of said ions; or the number of water molecules between them; and we still model these things as continuous fluids. So obviously the resistors are in parallel; there are pseudo-infinitely many paths they can take. But no matter what path they take they have to jump between ions several times, so it's also in series. Is there any formula that …

A valuable thought experiment from neighboring thread - how would physics develop if there would be no Einstein, especially regarding gravity? While modern physicists might say that without him there would be "weeping and the gnashing of teeth", his introduction of general relativity a century ago seems to be event of extremely low probability (?) - so what if it wouldn't happen? Or imagine some hypothetical other civilization e.g. SETI is looking for - would it automatically get to GR? If not, how their physics would develop? Beside Newton's gravity, there was also known GEM before ( https://en.wikipedia.org/wiki/Gravitoelectromagnetism ) - just tak…

Working on my science fair project. Is there any audio software that can overlay two soundwave patterns over one another? Not combine them. Basically, what I mean is I would like the red wave and green wave to stack together.

I am conducting experiments on MEMS microphones, preferably the ones used in the new generation of smartphones and voice-controlled devices? Does anyone know the model of the microphones used in iPhone SE/iPhone 11/Galaxy Note and other newer generation phones?