Physics
The world of forces, particles and high-powered experiments.
Subforums
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Vector forces, gravity, acceleration, and other facets of mechanics.
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For discussion of problems relating to special and general relativity.
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Quantum physics and related topics.
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Atomic structure, nuclear physics, etc.
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Topics related to observation of space and any related phenomena.
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3597 topics in this forum
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I am new here and this is the first thread I have created but I have a theory. I am starting to believe there is a new state of matter that is way below any temperature anybody has ever created or experienced. I believe there is a fifth state (states including gas, liquid, solid, and plasma) of matter caused by superfreezing matter and turning it into a pile of atoms. So much energy is transferred out of the matter that the bonds that hold the matter together fail. I do not have much evidence to back this theory up, but I am asking the members of this forum to help me with what I am stating.
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Reputation Points
- 9 replies
- 1.8k views
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Suppose I wanted to make a black hole around myself (not fall into one, make one around me), just to see what it was like. Suppose I could move around the insane amounts of matter required to do so. The question is, what would that look like? Below is my proposal for how I might make a 1 light-year radius black hole around me: A total of 6.37 X 1042 kg of matter is required, and must be contained within a radius of 1 light year to form the black hole. See calculation, it uses the Schwarzschild radius equation. In my scenario, I arrange the 6.37 X 1042 kg of matter into little (relatively) spherical masses arranged symmetrically along a larger sphere of radius 1.1…
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Reputation Points
- 5 replies
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Does it just exist? Any precise reason? Why is there a magnetic field on earth?
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Reputation Points
- 6 replies
- 1.7k views
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OK, please be gentle, i'm really not good at physics. As i understand it, there's 3 forces: strong, electroweak, and gravity. Other forces, such as magentism, can be described in terms of electroweak (?); i.e., it's not a unique force, rather a different incarnation of electroweak, or something like that. heat is not a unique force, it's just an incarnation of movement (i.e., the amount of movement of the molecules). But, i can't think of what motion is. it's clearly an energy, as it can be converted to/fro the other energies, so if it weren't an energy it'd break the first law; but, i can't see how it could be an arrangement of strong, electroweak and/or grav…
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Reputation Points
- 7 replies
- 2k views
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Hi. Why a diamond needle wears out by playing vinyl records ? What is there in vinyl harder than diamond in order to erode it ?
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Reputation Points
- 3 replies
- 1.4k views
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do we have such a unit for energy? and if there was such a unit, what would be its relation with electron volt? I guess they must be equel since they have the same charge but someone said it's 1840 times greater than electron volt.
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Reputation Points
- 5 replies
- 3.5k views
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I need a cool project that explains rotation v's revolution. I have to present this to my teacher and it will be in a science show case. I don't want to do the same thing with the earth and sun ect. I want something differet. I am in the 7th grade and it is an honors class. If anyone has any suggestions I would appreciate it... Thank you : )
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Reputation Points
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As a curious thought, if gravity is really caused by an object causing a dimple in space, then wouldn't the act of lesser mass objects falling into that dimple be in itself gravity in action? Do you see what I mean? Object falls in a hole = gravity. Smaller object falls into dimple around larger object = gravity. So basically, aren't we using gravity to explain gravity?
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Reputation Points
- 4 replies
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Hi I'm wondering what the explanation for this odd icicle that formed on my ice-tray recently? (2 photo's are attached). Thanks, Grant
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- 10 replies
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I am a bit confused about these two concepts. One example is the X-ray diffraction experiment. I think the principle of X-ray diffraction is interference of X-rays, not the diffraction. why it is called diffraction?
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Reputation Points
- 2 replies
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In my Calculus class today we were discussing thermodynamics, and one person claimed that he has thought of a way to violate the laws of thermodynamics. His proposal goes like this. Water expands when it freezes, so as energy is released from water, and it freezes, the expansion could be harnessed to give more energy then you started with, so you get the energy that is released from the water, in addition to the energy generated by the movement of the water as it freezes. I don't have enough of a background in physics to counter this, could someone else help me to understand how this fits in with thermodynamics?
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I am going to see Michio Kaku talk about his new book, Physics of the Impossible, at a local Borders on thursday. I haven't read the book yet but I plan to buy it at the store. From what i understand, the book is him discussing what technologies that we now consider impossible may be a reality in the future and what may never actually be possible. I don't know if he claims that certain things are impossible but if he does, I may be inclined to disagree. The reason for that is, there is no 100% concrete, indisputable evidence of something being impossible. I'm not sure that I can even imagine how to prove something to be impossible like that without having a Hawking-like T…
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- 9 replies
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Has anyone really been far even as decided to use even go want to do look more like?
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- 2 replies
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The plasma injectors are fused and the warp coils are fried, but is that why the warp field destabilized? It seems the answer may be "no". Apparently, when QM is taken into account, warp fields destabilize near c and the inertial bubble becomes irradiated. http://arxiv.org/abs/0904.0141 Now, who's working on the Star Gate? Merged post follows: Consecutive posts mergedAlso, what possible FTL is left?
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why's diffraction grating better than double slit experiment for finding wavelength of a wave
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- 986 views
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Don't sure this is the right forum for my thread because I am referring about a medical device that is blood analyser. The problem of this device is it can't suck the blood sample in the pre-dilute mode. The blood will be attracted into a so-called White blood cell basin. At that time, a plastic pot is at "negative pressure" and it connects to White blood cell basin via a valve. In the others way, the tube that sample will be attracted into also connect to that basin. So when I test "ON" that valve while no using sample (means the tube is connected to air pressure. The basin get two pressure, "-" from the pot and "+" from air. And so in that test mode, another motor …
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Reputation Points
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I recently aquired a device that turns neerby EM noise (unlike an AM radio) directly into an electric signal (for human hearing frequancy signals) for headphones. It is called an Induction Receiver and has a magnetic pickup that is a coil of wire. Other names include ground meter. I created another thread in the past asking for one to be made for me, this one is really good. It is bi-directional and creates a rich soundcape of noise and the best I can describe it intuitivly is as if elecrisity made a noise as it flowed. Although it's a bit heavy on mains hum. The device can fit into my pocket and is like having an extra sence. Please PM me to be added to my go…
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Reputation Points
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- 809 views
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What's the difference between centripetal and centrifugal force?
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Reputation Points
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Is the Photoelectric effect the same thing as the Photovoltaic effect? If not what are the differences? Thanks G56
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Reputation Points
- 5 replies
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What is the smallest object ever observed with gravity? Also, how is it determined/known that subatomic particles (ie free electrons) have gravity?
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- 1 reply
- 959 views
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Fairly straightforward question: why do solenoid actuators always have such short displacements? Is it due to the limitations of their typically small size? Could you theoretically design one that has a longer displacement, especially if you can make the moving shaft longer than the magnetic region? I'm partially thinking in terms of the jumping ring demo that's standard in first-year Physics labs. Also, why does the ring jump higher with AC? Is it greater voltage?
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I am at an ethanol refinery. We are measuring the wt% of ethanol in our beer prior to distillation. I measure the volume rate of this beer into the distillation system. I would like to convert the wt% ethanol in the stream to vol% to allow me to calculate the max 200 proof ethanol production from this stream. I've been told to multiply the wt% by 1.2, 1.23, and 1.26 by different people. I know this is temp dependent, but I don't need to be so exact. I believe these numbers may come from mixing with water and not the stream I have. The sg of the beer is 0.9385 and the sg of the stream after ethanol is removed is 0.9795 (still contains 0.05 wt% ethanol). Can anyo…
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Reputation Points
- 4 replies
- 11.3k views
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Hey guys, I'm trying to create a large square column of light that has the same diameter all the way down. This is proving to be extremely difficult. I was wondering if anybody had any ideas of how this might be created? Although not square would theater lights be able to achieve a spotlight that doesn't gradually expand as it moves further from the source or is this just going against the laws of light? Any input would be extremely useful!!! Thank you. Nez
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Reputation Points
- 8 replies
- 5.2k views
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Hi! Now, I heard a religious person tell that God exists outside time. Is this possible? I mean can something exist outside time? I'm a christian, and with low education, so I thought I ask peope that should know, ie, you. Just mentioned my christianity, so that you do not think me trying to disprove God or something. No. Just need to know the facts of it, ie can something exist beoynd time. thank you for your comments!
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Reputation Points
- 39 replies
- 10.1k views
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I wonder what makes anything trnsparent, translucent or opaque? Light can travel through vacuum but not through a brick-wall, but on the other hand sound (which is also energy), can go through a wall!
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Reputation Points
- 1 reply
- 1k views
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