Physics

Why does it took longer time to cook rice Porridge than rice?

What is the origin of Gravity? what creates it?

I was wondering what the fourth dimension might be, if a point is 0, a line 1, a square 2, a cube 3 dimensional. What would a 4 dimensional "cube" look like? My thinking went that if a metre cube sat in the same position this could be it. But would that be a cubic metre x second? So I googled metre second and found this link.. so if you know what a four dimensional cube looks like, let me know.

Can humankind ever resurrect the dead? Like every dead person in the world? This guy plans to do so by using Quantum Archaeology. I personally do not think humankind should ever mess with something like this, for various reasons. Do you think this will happen? Please read this article and share your thoughts. http://www.newsweek....ack-life-837967

I have been reading a few rather dodgy threads pertaining to gravity. A question not related to those threads but induced by them occurs to me. Firstly assume you have a hollow space and are not being crushed or burnt to a crisp at the centre of the earth, the sun, or even a black hole Assuming the above, would a gravitional force be felt. Would you feel any gravity at the dead centre of the earth, the sun, or a black hole? My reasoning being there is a equal amount of mass in all directions from the centre of any mass and gravity would pull equally in all directions producing weightlessness perhaps inside your hollow space.

A recent hike up in the mountains reminded me I'd like to understand better the physics behind snow and ice, in particular the combination of melting snow and ice similar to what I have encountered. As I walked, the impression I got was that the surface/outer layer was frozen (the surface was hard enough to support my weight), while the snow below that layer was softer: so if the icy crust cracked and collapsed under my weight, I hopelessly sank in the snow below. Was this observation correct in regard to the phenomenon? If so, can you explain why is it like that? Also, does snow begin to melt on the surface (because it's directly under the sun), or is t…

Hello,I am making a project on the physics of drifting right now. I have searched the internet for a while now and have not found much about drifting. I am wondering how friction, the frictional force, the centripetal force, and how inertia impacts drifting. I am also wondering if there is some way I could find the frictional force of a vehicle while drifting.

Hello, There is now a new theory in the field of physics that unify the concepts of dark energy and dark matter, add anti-gravity as a new force that is opposite to gravity thus making a balance that can allow variable gravity, black holes are instead black stars, and allow speeds higher than speed of light. It is also "singleverse". The name is "Theory of Ma : Singleverse" can be found at Youtube and Amazon.

Theoretical scenario, a nuclear missile is flying over to U.S that will be detonated in 10 minutes. You have 10 minutes to disarm it and or shelter yourself. God bless P.S Every nuclear warhead has a 0.1% chance to turn earth into a sun I call disable it with laser and containment field Red wire, blue wire

When people say you cannot survive moving at the speed of light, well, it generally means the short term acceleration towards that speed. What if you, increase your speed by 1m/s in the space vacuum, clear away of all debris. Just a vehicle that travels faster and faster by 1m/s in a straight path? Eventually you might accelerate past speed of light, and there would be no vibration from air pressure or gravity, just a straight path in space. https://en.wikipedia.org/wiki/Space_travel_using_constant_acceleration

I understand the theoretical graviton is a boson, spin 2 virtual particle. Nothing gets out of a blackhole (except hawking radiation) therefore gravitons if they exist must flow into a black hole from space causing space time curvature. Does this mean gravitons must exist in space everywhere? Is space and the graviton the same thing? Gravity is caused by mass/energy giving the appearence of stretching space. Under string theory the graviton is represented as an open string with each end connected to a multidimensional membrane or Dbrane as are all bosons. Bosons move along this membrane at light speed(with no analogous relationship to the aether…

Alright here is another of my movie physics. But imagine, if you have a full graphene suit, and an expansion suit inside. You would have the strength of steel, why? Because the suit outside can handle the wear and tear. The person inside, however, would need to produce a strength strong enough like the steel. In other words you would need to pull and expansion force close to that of a steel, like a balloon. Think of a balloon, and trying to bend the balloon, it reacts with a force right? How is this force generated. The expansion inside plus the plastic outside. In this case it would be pulling the graphene close to the strength of steel, but it would allow simple maneuve…

Magnets weakly repel organic tissue. How strong an electromagnet would be required to simulate artificial gravity and would a magnetic field that strong be harmful to a person?

In science I think the answer may simply be a region of space where nothing is measured (perhaps I am wrong and it is not simple at all) Are there any other ways of defining a vacuum ? I recall that topological types boil down to how many "holes" there are in the overall shape. Might these "holes" have any bearing on what a vacuum is?

Alright so, LED has fixed number of pixels, RGB, but LCD does not? Someone explain to me what ppi means in the below video, appreciated This is where you get seizure https://en.wikipedia.org/wiki/MicroLED

Sorry if hijacking but I was reading a paper about the theoretical mass of the Graviton. (Mainstream assumed to be 0, the below paper explained that is the mass would be non 0, it would explain the cosmological constant without need for dark energy) Cosmology from quantum potential: https://arxiv.org/pdf/1404.3093v3.pdf It's very short.

Directional microwave or even smaller infrared wave used with hyperspectral imaging technique(it means the 1% of the reflected laser light compares to 99% scattered light which creates an image) to diagnose hardware and structure.

Water reacts to electric field and oxygen reacts to magnetic field, can some explain to me why and the difference between the two fields.

Hello everyone, this is my first post and the reason I joined. I have a semiconductor laser from Thorlabs https://www.thorlabs.com/thorproduct.cfm?partnumber=LDM635 Which has a transverse mode that's not ideal for my application. I need a beam profile as close to a tem00 free of aberrations, and I get what's usual with laser diodes, which is an elliptical mode. I would like your opinions regarding which is the best (simple, cheap, optimal) way to circularize an elliptical beam. Thanks in advance for your time and apologies if this is the wrong forum, I couldn't find anything labeled "optics", "laser" or "lab gear".

In optics, the Ewald–Oseen extinction theorem, sometimes referred to as just "extinction theorem", is a theorem that underlies the common understanding of scattering (including refraction, reflection, and diffraction). An important part of optical physics theory is starting with microscopic physics—the behavior of atoms and electrons—and using it to derive the familiar, macroscopic, laws of optics. https://en.wikipedia.org/wiki/Ewald–Oseen_extinction_theorem https://arxiv.org/abs/1507.05234

Why do people say Quantum Mechanics is strange or weird? Is it matter being two places at once? Matter being in state of not knowing. Object is affected by the Observer looking at it.

is there such a thing ? has anyone made such a thing ? if not, what is the theory that explains that it canot be done ? if yes, where are the 'poles' ?

I heard it said that electromagnetic waves have energy within them. Is that true? And, if so, what kind of energy is it? I don't think it would be thermal energy. I don't think it would be potential energy. What is it? Thank you.

Hi. A coil of N turns wound on a long spool of small diametre, and another coil with the same number of turns N wound in a short length spool of large diametre. Testing one at a time, which should produce a larger voltage output sensing a spinning magnet several metres away ? Would results be different with iron cores inserted ?

I have always wondered why the energy of a photon in vacuum is equal to E = pc (where p is the momentum of the photon, and c is the speed of light in vacuum) and not E = 1/2 pv (where for a photon v = c) as is the case for the kinetic energy of any moving mass. Of course, I understand that photons are massless, but can anyone clearly explain how E = mc^2 and not E = 1/2 mc^2 and prove that in a theoretical non-empirical way??