Physics

Light has been measured to move at about 186,000 miles a second. In Einstein's special theory of relativity he explained what would happen if that ultimate speed limit was approached. His theory was proven correct when it was determined that there was an absolute differential between the time registered on atomic clocks on Earth versus the atomic clocks on vehicles orbiting our planet. My question is, does anyone have a theory as to why light maxes out at about 186.000 miles a second. I mean why specifically that speed? I am a part of a think tank that is of just recent trying to answer this very question. Our team is working on the idea that this speed limit has somethin…

I came across several articles discussing issues about MRI in smartphone. How is it possible that giant MRI can be fitted and installed in tiny smartphone?

There's no scientific law or term that I can possibly contradict. Although there is a small exception to this rule, which I've pondered for a bit now. That's the law of Entropy... with the statement that "everything tends from order to disorder". The reason why I find this statement incorrect might be obvious; I don't believe that things constantly tend from one to the other, but back and forth between the two. Of course, it depends on how someone sees these words. Myself, I understand order as everything being sorted in a neat pattern, or arranged based on a set of logics. Whereas disorder is something being moved around chaotically, or simply broken and splattered a…

Hi Every! Thanks for reading. I'll start off by saying I'm not sure if this is the right sub forum for this question and I apologize in advance if I have posted in error. I wanted to do a simple experiment to compare the current output of 4 different usb charging bases. I used a multimeter and modified usb wire. If you're not familiar with this item here is a quick intro: To charge many devices at home a "wall charger" is usually included. It consists of a base that plugs into the wall outlet and has a usb port. A usb cable is used to connect the base to the device (phone / tablet / etc...). Most bases are typically 5 Volts and have a current between 1.0 amps…

I was thinking of Einstein's spacetime concept. Particularily the part where, if an object travels near the speed of light, its velocity through space slows down its passage through time. I always understood this as particles having a limited potential, which they cannot gain or lose (without the particle changing its structure) but rather "buy or sell" between dimensions. However, one interesting problem arises: We see space as being three dimensional, and tend to envision it in three axes; Up - down, left - right, back - forth. So how is it that space doesn't show this behavior across fixed axes? A particle going at the speed of light should only be able to travel in 6 …

Hi all, I am looking for a type of liquid crystal with the following physical properties: Clearing Point: 93°C Delta N = 0.1521 Delta Epsilon = 10.6 These values were obtained from a type of liquid crystal from MERCK (ZLI-4151-000) but they no longer produce it. Has anyone here used this LC before? If so, does anyone know where else I can get it from? Thanks. Does anyone know any companies that sells liquid crystals?

Mathematically, in a simple a logical sense, time just does not seem correct to me. Despite the fact that I observe it. But in order to move from one second to another, we have to travel half that distance in time. And half that distance. And half that distance. To infinity. So theoretically, we cannot move forward in time. We would have to travel through an infinity of infinities between an infinity of intervals of time. Xeno's arrow could never have never hit it's target then. It couldn't even leave the bow by this reasoning. So time seems to be just the stitching together of brief instances of existence of matter in a certain arrangement, translating the informatio…

earth isnt so stupid as it looks like

V speed, cannot be V ^ 2 / t beacuse its fault

Hi, I have a mixture of hydrocarbons with a wide range of boiling points (200-620 centigrade). I want to distill this mixture in vacuum. I have no problem for distillation of light fractions with boiling points less than 450oC. But for the fraction with boiling point in the range of 450-620 centigrade, I need to do the distillation in high vacuum (0.01-0.001 mbar)! How cant I get this amount of vacuum by combination of different vacuum pumps (Roots Vacuum Pump; SIDE CHANNEL Vacuum Pumps; Liquid Ring Vacuum Pumps and Rotary vane Vacuum pump!)? The size of the distillation chamber (Made of black iron sheets) which we use is about 50000 lit, so the speed of vacuum shou…

G, g, and Strong Nuclear forces.... Are these forces all the same, or are they different??? Yes I know about acceleration, but it is still a force. G from what I know is the same in all the universe yes?? Science talks about forces, but if these forces have never been seen, how then can these forces be either related, the same things, or have different values, on different planets, altitudes and etc.. As per the periodic table being involved with invisible forces, only obscures matters even more... Please pardon this, but I don't get the point, this makes no sense whats so ever...

After Reading a Few theory's on how our universe was created a few people have stated that there are a couple of ways our universe was created, According to the first theory our universe is the result of a Source with infinite density and mass, resulting in the big bang theory creating a 3 dimensional plane of existence that we live in, while time is supposedly a 4th dimension surrounding the 3rd dimension an expanding with our universe, they went on to say that our universe is young an will eventually evolve into a higher plane been a 4th dimensional plane of existence then so on to a 5th dimensional plane thats what they stated in the first theory..., other physicist ha…

Hello guys I had a question in mind and i wanted a pretty neat answer for it so thought i'd put it over to you guys Okay , i wanted to know what would be the perfect frame of reference that could be used as the origin for motion . Some say time IS the best frame of reference. But recently i read an article and ever since had this question in mind. Is time really the PERFECT Frame of reference for describing motion ? Or does even time lag behind in some aspect ? Fill in the details as much as possible Thanks xD

Light is, to my knowledge, made up of particles that behave in a wave-like manner (just like all matter in the universe, technically). Going by that, should it not be possible to make these particles speed up or slow down? Movement is energy, and I can think of three energetic forces that might have an impact on light: 1. Heat. Higher temperatures make all other forms of matter speed up, I don't see why light would be an exception. I'm not sure whether this has been tested, but logically there should be some kind of difference in speed between the light being released from an immensely hot light source (let's say a star) and the light lost out in freezing space. Furth…

As far as photons, am I wrong in the idea that there is still a debate concerning light being a wave or a particle. The reason I am asking this is because I just wrote a post suggesting that photons are particles that carry the force that is at the source of the governing dynamic of the electro/magnetic activity. If light is not a particle, and light consists of photons, does this mean that photons are waves? Can waves carry force in the same way that photons are thought to?

Ok so its preaty well known that if you are moving extreamly fast relative time slows down depending on where you observe it from also time does the same when somthing are effected by gravitational mass so hypothetically could you bombard an object with microscopic black holes causing an area where they are passing through (in abundance) to stand still relative to the world around it?

I am disappointed by my high school physics education. My teacher teaches me physics in the textbook however not the nature of the physics: What is physics? Also the textbook only gives a mere introduction of the science, so i dont see the whole picture.

Which do you agree with? Please state why.

I was trying to think of new age energy sources and this occurred to me. Could have sworn I read about it somewhere in that context. I'm probably wrong. I mean, to my knowledge, gravity is just there. It's a property of matter. Nothing "powers" it. By that logic it's creating energy out of nothing.

If Antimatter hit a black-hole would it destroy the black hole or make it bigger? I know how Anti matter reacts to matter but how would this effect a black hole?

Basic quantum question. Not even really at that. Wave mechanics perhaps. But when photons and electromagnetic radiation strike a material and cause the emission of an electron because the radiation is at the proper frequency, would this be an atomic example of resonance frequency? Or even, to an extreme, an example of resonance disaster?

Just wondering,is the 3rd dimension just depth?

So I want to measure the distance between two objects wirelessly, which should preferably give out the same type of waves to do so. My prediction is that slower the speed of the wave, more accurate we can measure the distance between the transmitting objects. So radio waves or sound waves are much slower than Bluetooth which works at the speed of light? if I'm correct. I'm a complete novice to every form of science, especially physics. So please tell me the most accurate and the most energy efficient way of calculating the distance between two variable objects wirelessly. It does not have to consist of a method of waves. Thank you, Waiting in anticipatio…

Hello everyone Here's a question in preparation for the med school approval exam: A freighter, which has a constant horizontal sectional area of [math]4,500\text{ m}^2[/math], lowers [math]6[/math] more meters into the water when it's filled with cargo. The mass of the cargo is: 1. [math]27,000,000 \text{ kg}[/math] 2. [math]270,000,000\text{ kg}[/math] 3. [math]60,000\text{ kg}[/math] 4. [math]4,500,000\text{ kg}[/math] To try to solve this, I called [math]l[/math] the length of the freighter, [math]h[/math] the height and [math]d[/math] the depth. Let [math]x[/math] be the height that is under water when the freighter is unloaded, [math]V_{o_1}[/math] th…

When big bang happened our universe had created and at that time there was no matter but only energy , will any one explain then how matter was formed from it ? And at that time what energy looked like I mean in empty universe how can u tell that here is energy and this is energy , was energy present as sort of some particle or something else ?