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Physics

The world of forces, particles and high-powered experiments.

  1. Started by fredreload,

    Alright, there is a person standing there. I am intending to take a high resolution neuronal live cell imaging of the person non-invasively in real time. I've looked through all types of microscopy techniques, which, you know, requires you to look through a microscope without the neurons being blocked by the skull. With the finest detail being an electron microscope that is, but to look through a sample, you would need to generate a 3D mesh, so I look into spectroscopy, which generates a hyperspectral data based on the Raman spectroscopy if you know what I am talking about. So simple laser spectroscopy, how detail does it get? There is Raman spectroscopy and al…

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  2. Started by Thanos,

    Hear me out . I am no where near a scientist I am just a curious guy . I stumbled across a video that said it's possible for all but about 2 or 3 of the Infinity Stones in the avengers to be created . I think he said the the Reality Stone (red), the Power Stone (purple) and I think the blue Space Stone . Do you guys really believe that ? If so how much do you think it will be ?

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  3. Started by Thanos,

    Hear me out . I am no where near a scientist I am just a curious guy . I stumbled across this video video removed by moderator And it says all but two of the Infinity Stones a possible . Do you think he knows what he's talking about ? And how much do you think it'll cost ?

  4. Started by SilentSky23,

    This should be in relation to rotational physics. Now, say you have a rotating person. Would it be possible to change axis of rotation/change direction of rotation while rotating? For example, say the person is doing a head-to-toe twist, but goes from that to a cartwheel or a flipping rotation. Would that be possible? Why or why not?

  5. Started by Externet,

    Never seen these until today. I think they are called currach oars. Massive. What is the reason are made such way ? Appear to be poorly efficient.

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  6. Hi. Smoke detectors containing Americium... Can some gamma sensor discern if a house has one installed from 50 metres away ? Can instead, a single Am pellet extracted from such smoke detector be detected from a distance ?

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  7. Started by Zolar V,

    Hey fellas, I know its been a freaking long while since i posted or visited here last. But i was remembering an old experiment i did back in high school that i couldn't do right. I know that the data i was supposed to see was going to be a positive exponential increase. But my data was too jittery, mostly due to poor experiment setup and execution. Ok, this is what i was trying to find: If you have 2 permanent magnets ( i used 2 Neodymium barrel type magnets. 1 In Dia, 2 In height) How much force is one magnet being pushed away from the second magnet. My hypothesis: As the second magnet gets closer, the first magnet will be pushing away harder. …

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  8. We are constantly storing new memories, but is it possible to modify existing memories? Sure if you hit the head with a baseball bat you ought to forget a few things, but what if you can modify the memory with electromagnetic radiation? What if you can modify even the most basic logical concept? Sounds pretty cool heh.

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  9. Year after year, somewhere in the world, its forests are on fire. There's a lot of talk about people displaced, but not about energy that went to waste. Is it at all possible to set up a network of pipes carrying seawater, (and/or giant enclosed containers of the stuff; obviously not tall, just long and wide) such that any burning forests underneath them would force the resulting water vapour into a pressure release valve underneath a steam turbine? Apart from any initial investment in such a project, would there be significant maintenance costs?

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  10. Started by someguy55,

    How loud, in dB, is shattering glass (a cup or window) at 1m?

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  11. Started by muskan,

    I hate Physics. But I love Chem and Math. Should I continue my non-med?

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  12. Dear Prof. Andrea Pocar University of Massachusetts A new nuclear property (unknown by nuclear theorists) can be connected to dark matter. The new nuclear property is clearly evidenced in the lithium isotope 3Li6 (see "note" at the page 10 of the paper "Calculation of magnetic moments for light nuclei with number of protons between Z=3 and Z=30"), where it is written: Note: Perhaps this influence of the n(o)-flux in the inertia of the nuclei has relation with dark matter, …

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  13. Started by wwlad,

    To: Dr. Frank Wilczek MIT- Massachusetts Institute of Technology Dear Dr. Wilczek In the end of 2017 I sent you an email, with the manuscript of my paper "On how Bohr hydrogen atom is connected to nuclear physics", and i invited you to face the challange of discovering the equations that rule the interactions between electric fields composed by elementary particles, as proposed in the Fig. 2 of my paper. The paper was publ…

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  14. Started by Edemardil,

    Hey everyone. I have built a Rube Goldberg in Algodoo and I have a section where a small ball is held on the top of a ramp by a lever with an axle. What happens is a larger ball interacts with them, pushing the smaller through the lever and it drops down continuing the machine. Would the only force acting on the small ball and the lever while it is at rest be friction basically?

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  15. Started by elchapetas,

    Do massless particles (such as photons) create a gravitational field? And if so, how?

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  16. Started by Pete,

    I've been curious about this lately so I wanted to ask a question for the folks here. Who among you consider themselves to be open-minded physicists? For those who consider themselves to be open-minded can you think of a concrete example? Please explain what it means to you for a physicists to be open minded? Thank you all in advance. Pete

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  17. I am not a university student. I am just in high school but am studying physics and chem. I am just sitting here wondering why do we have energy. I mean look at computers communication there is 0 and 1. on and off. Off will always be a granted but why is there an on. nothing has a purpose because for something "not to be real" makes more sense, because It is nothing (empty) there is no reason for it to exist. but for things to exist makes zero sense. So if energy can be off why do we have an on. such as a 1 and 0. our brains the same electrical pulse no electrical impulse = movement. Where does this energy come from?. people lack the understanding of nothing but, to…

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  18. Started by Cristiano,

    If I integrate the speed I obtain the space, but if I integrate the space, what do I get?

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  19. Started by Superboy,

    So, I have an interesting idea. My idea is to build a technology that is able to counter act any force applied to it( if somebody were to throw a punch, this technology would counter act the force applied and make it to where the force from the punch goes back to the hand that threw the punch). The problem is that I don’t know where to begin with building this device, so if someone can point me in the direction of some sites that can help me or books or videos or even what I need to begin building, that would be greatly appreciated. Look forward to what you all have to tell me.

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  20. Can you disable a gun powder gun with electromagnetic radiation? Can you use laser to shoot down a bullet?

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  21. Started by discountbrains,

    My question is simple: Consider a rod of length L moving straight from A to B at 0.99c. L is much shorter than distance from A to B. An observer sitting at right angle to the motion can measure what he thinks L is at this moment. The question is: Now, what does he measure for the distance from the leading end of the rod to B and trailing end to A? Should these measurements be the same as when the rod is at rest or should they be greater or what? I was directed to Wiki which showed several discussions on length contraction that made their authors famous, but nothing about my question. I now think I have stumbled on something profound here. I think I could put together eno…

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    • 11 replies
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  22. Started by Danijel Gorupec,

    I have questions about local conservation of energy. I am trying to better understand consequences that follow from it. How I understand it, the 'local conservation' means that not only energy is conserved, but is conserved in every local region. It cannot just at once decrease in one region, and increase in a region far away without anything happening in between. So, is the local conservation of energy a true law? It seems correct to me, but I cannot remember if I ever heard about it during my formal education (looong time ago)... [BTW, is it also valid regarding quantum mechanic? Specifically what I have in my mind is the wave …

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  23. Preferably the forearm. I can't spend big money on x-rays, nor can I chop my arm off I've asked this elsewhere - LINK I know the volume of my forearm, using the Archimedes method, for 10 equal segments of my forearm. I've also looked at x-rays to work out roughly tissue distribution. Only issue, in terms of precision, is there is quite a big difference in density between bone, fat and muscle. On average, bone is 1.7500 g/cm and muscle is 1.0599 g/cm3.

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  24. is it possible to launch air balloons carrying a large mirror and than point a telescope at the position the mirror would proximity be in , and see a reflection of earth?

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  25. Started by John Jeffkins,

    Evening. I am having a problem with a new engineered timber front door which has a man made core and oak veneer surface. The door is painted in three coats with quality paint and has a dark grey finish. The door faces east and is well protected from the rain. Over the past few weeks on sunny afternoons, the door warps approximately 6mm and then returns to its straight shape sometime the next day. The door supplier says this is because the paint system isn't stopping the UV radiation and are refusing to do anything. Surely no paint can stop the warming effect of the sun and as the paint is dark grey presumably it is actually increasing the …

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