Physics

If the wave function is being stretched by the expanding universe,where is the energy going?

A car, starting from rest and travelling from p to q on a straight level road, where | pq | = 10 000 m, reaches its maximum speed 25 m/s by constant acceleration in the first 500 m and continues at this maximum speed for the rest of the journey. A second car, starting from rest and travelling from q to p, reaches the same maximum speed by constant acceleration in the first 250 m and continues at this maximum speed for the rest of the journey. (i) If the two cars start at the same time, after how many seconds do the two cars meet ? Find, also, the distance travelled by each car in that time. i am trying to use uvast equations to solve this but i cant. can someone help me

hi; Let , a ≤ x ≤ b , y1(x) ≤ y ≤ y2(x) ,Let ,V be an interval/region ; a ≤ x ≤ b y1(x) ≤ y ≤ y2(x) , z1(x,y) ≤ z ≤ <z2(x,y) in this case ; might we calculate this integral if we would like to choose our "R" function as any type of light or magnetic wave’s equation ? a∫b y2(x)∫y2(x) z1(x,y)∫z2(x,y) ∇.R.dV thanks

Greetings Everyone, I am developing a sci-fi video game called Sigma. Having said that, the point is: At one of our stages we'll have a scenario full of rocks floating around, similar to what we see in pandora from the James Cameron Avatar movie. One explaination me and the writers thought about it was maginectic repultion, that happens because the rocks and the Earth's area below them is magneticaly charged with the same charge. But thinking about our soldiers, who are cyborgs, full of metal... they could be affected by the magnetic fields as well, being attracted or pushed, depending on the charge of the armour they're using, what is a problem. Does someone has a theory…

Hi all. Any clues on where to find figures for magnetic field attenuation trough seawater ? As at different depths/temperatures/paths, will a compass become less sensitive to earth magnetic field ?

You receive signal from the satellite as a constant stream of data with a receive and get free internet, it's only a concept though

Why do soft plastic (like of chair or toy) become white on bending it ,irrespective of its original color?

I've been trying to use this large chunk of jellied tissue between my ears and the idea of liquid water on Mars isn't adding up. "They" say that in the distant past Mars had a more Earth like environment and liquid water but "they" also say the sun was dimmer way back when as well. That only compounds the problem of liquid water... Just how dense an atmosphere would Mars have had to have under a dimmer Sun to support liquid water and oceans and rivers? I have an alternative opinion... I think Mars was once covered by ice, under the ice water flowed and created the land forms we see today that look reminiscent of river alluvial fans and such but these t…

This topic over laps equally in physics and maths, but since physics is essentially applied maths, I thought it fit best here. My question is: 1) assume our universe isn't a simulation and it's physical laws are prerequisite to all simulations. 2) we create a simulated universes sometime in the future using a portion of this universes energy. 3) within that simulation, simulated beings eventually create a simulated universe of their own. 4)all simulations are modeled on the original physical laws. 5) this process is repeated in each subsequent simulation. Is there a physical (thermodynamic) limit to the number of possible universes or is it …

Quick question, could we magnify the sun into (or onto) an array of solar panels that then transfer the energy to earth using radiation (microwave?). Secondly could it be magnified (concerntrated) to the extent that it becomes a high energy beam (like a laser cutter that uses mirrors and optics) from some satelite in space, do we have the technology to make such a device and what effect would the earths atmosphere have if it were to be aimed at say....england. Regards.

I was thinking about the electric field, and came up with an idea, tell me if it is valid. Perhaps electrons and protons (and other carriers of the force) bend space in such a way that electrons (and other negative particles) bend it to one direction, while protons (and other positive particles) bend it to the other direction. In this way also the electrons repel each other, as do protons, while electrons and protons attract each other. I am not sure if this bending of space is in 3 or 4 dimensions, 4 seems more reasonable to me though. Here is a picture -

Hello, just wondering if it would be theoretically possible to harvest, for example hydrogen, as a clean fuel source from the gas planets? Surely there's an equation where mining / harvesting operations become profitable from what are obviously incredibly rich sources of useable energy? Or is this totally impractical, even with uber-forward-thinking scifi goggles on? Thanks!

Firsly radiation containment: Is it possible to emit highly ionized particles in a (parabole if external, hyperbolic if from various locations or spherical if internal) to the location of nuclear fallout to the extent that the combined ionization equates to zero? Such that, for example, gamma radiation of the same or very similar (possibly higher) energy levels are emitted to the fallout location (prefferably within an instance of the chain reaction caused by the critical mass, but not exclusively, just as damage limitation) so that the instability of the sum of the ionized radiation is counter acted. (In the same regards as nullifying a beam of light in the correspondin…

What is sound? Sound is a vibration, basicaly an wave. What is light? What i found about ligth is that it can be an wave or particle. However couldnt conclude which of those is, maybe both? As u know we can block sound by creating an counter have. So my question is, can we create an counter wave in order to nullify the light?

Last year, when i just back home, everything turns dark, i can't see anything but a Christian cross in dark for a few second. After a few second, i see my home appear and the cross gone. I am sure that was not a dream, and i sure i "see" it, a white cross, with vine with grapes on it. What's that? Can someone give me a scientific answer to me?-Why this will happen?

I have a simple doubt about the orbits of the planets in our solar system Is there a recorded instance where all planets in the solar system have lined up straight? And is there any planet whose orbit is perpendicular to earth's orbit?

I have set up an experiment which measures the variation of small currents (10 to 100 nA) with time. My samples are some treated diodes held under reverse bias at elevated temperature (50 C). The data shows a clear daily cyclic variation in all the measured 'leakage' currents (I have 8 diodes measured sequentially) and I am stumped to know why. The lekage current peaks at around 10 PM and reaches a minimum at around noon. The maximum current is up to 8% greater than the minimum. The "waveform" of the variation is broadly sinusoidal but distorted by the fact that the rise time is ~10 hours whilst the fall time is ~14 hours. The diode leakage current is particularl…

I was recently trying out a (very) small electrolysis experiment. It is literally a bottle cap with two nails inserted, connected to a 12v power supply. If I pour a bit of water into the experiment, it does what I expect. However, once I was feeling a bit lazy and couldn't bother to collect some water. So I decided to just spit into the experiment. And when I tried it, it started to produce this weird white liquid. A few seconds later, red blobs started appearing and it started to get harder. So my question is - what is this stuff? Is it splitting the elements of saliva like it does with water, or does the saliva somehow react weirdly to electricity?

So basically I signed up here just to get an answer on this question. Lets say we have a car, with a caravan attached to it. We have the choice to put a block of 500 kilograms in either the car or the caravan. It has to be placed in one of those. There's about 1 meter between the back of the car, and the start of the caravan. Is there any difference on the amount of resistance on the cars energy depending of what choice we picked and why? I hope you understand my question, else I will happily explain further.

In our solar system Mercury was once though to be tidally locked to the sun, now we know it rotates three times in two orbits of the sun. Is it probable that planets that are being discovered in close orbits of small stars but still in the life zone of that planet might do the same instead of being locked like the moon is to the earth?

I photograph birds as a casual hobby. Recently I upgraded from a camera with a 16x zoom to one with a 30x zoom. It is amazing because the camera viewfinder (when it decides to focus) acts like a binocular and through it I can see details of a bird's face from many yards away. One thing I have discovered is that, when I use the 30x zoom on flying hummingbirds, the wings are often visible in the pictures. I used to see photographs like this and I thought it must take some kind of special camera to freeze a hummingbird's wings, which are an invisible blur to the naked eye. But what is amazing is that when I look through the viewfinder, at 30x, the wings are visible! …

I have a random question, so what if you figured out a way to increase or decrease the number of gluons in a proton. Because gluons pull the quirks together, Would this have any offect or the proton and if so what would happen. My theory is that if your decreased the number of gluons in a proton than it would cause the proton to fall apart as radiation and if you increased the gluons than it would cause the proton to like fuse together or somthing. Also would there be a similar offect if you increased or decreased the number of mesons in a nuclious?

Hello everyone, Can anyone give an example of a lab experiment that takes place in CERN that would cause a wormhole? Its ok if its a little fictional. I just need a basic scenario. Thanks.

So there are plenty of resources around explaining why the sky is blue with Rayleigh scattering. Now according to this website, and others, one of the reasons the sea is blue is Raman scattering: But it fails to explain exactly why Raman scattering would produce a blue sea. As i understand it Rayleigh scattering predominates Raman scattering and would be sufficient to explain the blue sea. If anything, as anti-stokes scattering, which would shift towards the blue end of the spectrum, is rarer than stokes scattering, which shifts towards the red, wouldn't the overall Raman shift be towards the red end? I'd appreciate any pointers or useful resources to …

How that is Photons increase the mass of an object that absorbs it, if the photons have no mass? Since all reactions in Chemistry can always go 'both ways' and be reversed no matter how improbable the odds for one side of the reaction vs. the other, it seemed logical to me that if nature/chemistry is this way, perhaps mass to energy is this way as well? We know Mass converts to energy, how can we be certain that with enough energy under the right circumstances we might not be able to create mass from energy? m = E/c² How that is Photons increase the mass of an object that absorbs it, if the photons have no mass?----http://en.m.wikipedia.org/wiki/Matter_creation-------