Physics

Is the title right ? How do wavefronts increase their amplitude trough a funnel ? The inlet area ratio to the outlet area produces a louder signal, obviously, as these things worked a long ago. What about the effect of its length - which relates to the angle ? If a soundwave gets amplified entering the wide end and exiting the narrow end; what is the effect in the opposite direction ? Is the wide end flaring an empirical/cosmetic shape ?

Question : what is the unit of heat do they possess. (photons)

I recently watched Christopher Nolan's Interstellar and came up with a question regarding one of the planets orbiting the black hole, Gargantua. If the planet that Dr. Mann landed on was close enough to remain in Gargantua's orbit wouldn't it need to remain at a velocity faster than the speed of light? Light isn't quick enough to escape a black hole's gravity; everybody knows that, so how can a planet be close enough to Gargantua to be in orbit, yet fast enough to escape being pulled in?

The Cosmos series made me think about how dense elements are formed from the life of a star. Wouldn't there then be an evolution of elements over time as new stars are formed from the remnants of supernovas? If that's the case incredible new elements would be formed. I'm sure I'm missing something here maybe it's that a star can only be born of hydrogen therefore there might be a limit on the atomic makeup of elements. I don't know. Just had that question stick in my mind.

If you make an arragement of atoms in the tightest way possible, due to their shape (even though that term is very loose), there will be some gaps in matter, or ''micro-vacuums''. Therefore, there must be such a thing as the highest possible number of atoms that can be fit inside a space of certain dimensions before the nuclear force is broken down. But the nuclear force can be broken down, something that happens when a black hole is forming. To my understanding, the singularity of a black hole (if there is such a thing) is thought to be comprised of just matter with no gaps in structure. This would mean that the space it occupies is occupied in whole, without the po…

^Please answer it in the most basic but clearest way(Im not the best in science).Thanks alot!

The heavier a racing car is, the less it performs. Spoilers provide more attachment to the track by pushing the vehicle down. Is this pushing down equivalent to increasing the weight of the vehicle ? If yes, the suspension compresses more at higher speeds. right ? -Stay with flat, level road, fixed spoilers...-

This is my first post and I'm glad to join this awesome community. So yeah lately I've been wondering about this and I thought of a lot of possibilities this could end in, I discussed this in some other forums but none of them really could theorize a solution. So let's say we have two men in two spaceships in a vacuum, they both have clocks which show the same time at the start of the experiment. One of them is "A" and the other is "B". They are facing apart from each other (180o) and as the experiment starts they both start traveling at 75% the speed of light (away from the starting point). If you look at this from a Classical Physics perspective technically t…

In another thread the Big Bang Model was mentioned and it made me wonder; do 'current' versions of models ever exist in a specific place? For example, is a compiled, current version of the Big Bang Model available in a format such as a .pdf, or at a lab at a university on computers and in boxes? Or does perhaps the 'current model' refer to something more akin to 'all of the generally accepted scientific knowledge' about the Big Bang, where some is shown in a public source, but other parts are in a scientific journal, and no one has bothered to (or even can) compile it into a single place? Back in the day if someone wanted to know precisely what people meant when t…

This question is based on the property of space in my point of view. In my point of view, space-time is peculiar because it can curve even if it is not tangible or at "first sight" it is somewhat unrecognizable or we don't even mind about it but here it comes because of G.R. we found out that it is a thing that can curve thru mass/energy. The second question follows, is mass/energy the only "thing" that can curve space/time, if yes then why? Answers or feedbacks are very much appreciated. Thank You

My question is, is light heavy. Ive tried asking in other forums but don't get any good answers. I've been told photons are massless but have momentum (a product of mass and velocity) so that doesn't make sense. Matter is transformed into energy so if there is light in the universe is it getting less massive. If yes what runs out first energy or matter?

Does time have energy? Like if you go to the edge of the universe and try to leave, time stops. So that suggests to me time in not infinite. So is time powered by some kind of energy? Which of the four forces make up time?

I am wondering if other planets in our solar system have such a big variety of elements as our Earth does. And if not why is Earth different?

As far as we know, in the earliest days after the Big Bang, light elements like helium appeared leaving the heavier elements to form later inside stars due to strong nuclear reactions. I wonder if there are even heavier elements out there formed in supernova explosions that did not end up on earth. How likely/unlikely is that?

In RE: https://www.google.com/patents/US20060145019?pageId=111028569981762970673&pageId=107422565180807765757 SUMMARY: This invention is a spacecraft with a triangular hull having charged flat plates on the vertical corners of the three sides. The two rear corners are charged to a potential V. The forward corner is charged to a potential −V. The 60° angle on the corner creates a line charge density singularity that produces a huge horizontal electric field pointing from the back to the front of the craft which is also parallel to the sides of the triangle. An array of horizontal slot antennas located on the sides of the triangular hull produce an electromagnetic w…

There are three parts to the following question about electrical circuits... First, when there is one light bulb in a circuit, parallel or series, and you unscrew the lightbulb, there is no more current but the base of the unscrewed lightbulb (the part that's connected to the circuit, not the actual bulb) still has voltage. Why? Secondly, there are two light bulbs in a series circuit and one is unscrewed (again there is no current in the circuit), but there is still voltage in the unscrewed lightbulb base, while there is no voltage in the lightbulb that is screwed in, no matter what order the two lights are in the circuit. Why does this happen? Lastly, if you have two lig…

I know that atoms break down into smaller particles through radioactive decay but do photons ever decay? Considering they have no mass leads me to think "no" but I do not have strong physics knowledge so was hoping someone could shed some photons on this question.

Hello, I noticed a bad trend in science mass media where a information with factual basis is presented or a study made by qualified scientists and then comes the crazy media assumptions caused by a need to excite the uninterested public. I had such a case with the Uniform temperature of the Universe. I was trying to find a pertinent explanation for this but all I was able to find is gibberish. Can someone please explain the uniform temperature given the young state of the universe? (as I read and discount as gibberish is that the universe must have had expanded faster than the speed of light for this to happen).

what is the likelihood that everything we see, taste, touch, feel and smell is merely the product of a highly sophisticated simulation? if everything is a simulation, what would happen if we die? if we develop technology to live forever, does this mean that we are stuck and those will be stuck in this simulation and can't get out?

Any body knows for sure ?

Hello everyone I basically get the hang of MRI, but I'm left with one small - not all too important - question: Although protons do not genuinly spin, creating their own cute little magnetic dipole, let's consider they do, for simplicity. Does the right-hand rule apply to protons? Or electrons? As in: consider a proton spinning in the plane of your computer screen, in a counterclockwise sense. Does the magnetic dipole inducted by its spin point out of your screen? Or inwards? Is the contrary true for electrons? (Not important in MRI, but just curious; physics is a great while ago) Thanks. Function

I recently inflated a balloon inside a box, how doe's the box space end up inside the balloon?

Hello, I was wondering about something and was hoping to get some clarification. As I understand, the gluon is a mass-less particle and it always moves at the speed of light. But the gluons are also what hold together quarks in a proton. So how does it "always move at the speed of light" and is also part of a construct which contains particles with mass?

Hi, I was looking into Doppler shift calculations, and I came across this blog post (http://jazzistentialism.com/blog/?p=1728). It gives a very simple and straight forward account of calculating the velocity of a star. Following is the summary the blog post: Spectrum of Alpha Centauri (A. Cen.) is obtained through Lhires III spectroscope. Spectrum of the sky/sun is used as a reference for calculations since A. Cen. and Sun are G2V type stars. When the A. Cen.'s spectrum is superimposed on the Sun's spectrum, A. Cen's lines have shifted to the left (blue). Shift is 4 pixels. From the spectrum, two Iron (Fe) lines are identified at 5371.5 Å and 5424.1 Å. They are 52.5…

I want to write a sci-fi short story, and want to use a possible method of superluminal communication (Communicating with someone faster then light) I am no scientist and literally just searched "Science Forum" so feel free to correct me. Here i go. A personal theory that i could not find anywhere else on the internet was using gravity. Let me explain If you could change the amount of gravity quickly in you're location then someone many light years away would instantly be effected by that gravity. So if the dude light years away could bounce a laser of a planet and very accurately measure difference of planet orbit because of gravity far away one could commu…