Micro Definition and 106 Threads

Hi It is about a DNA strand on which there are always two segments, the segment ##A##, which is folded and has the length ##l_A## and the unfolded segment ##B##, which has ##l_B+\lambda##. Here is a section of the DNA There is now, as shown in the picture, a force ##F## pulling on the...

Are there soundwaves so tightly packed that you could have two people standing next to one another and fire sound at a distance directly into one person's ear as that only that person hears it?

Let's say Mary has mastered every microscopic physics from quantum theory to particle physics. But she hasn't encountered iron or other macro objects. Can she predict using say a super computer at her disposal the properties of macroscopic objects? Let's say the super computer can assemble the...

In recent years, the "Casimir Effect" has been used to generate mechanical motion in micro devices. Is it in the realm of possibility that some such device could be made to oscillate or rotate?Regards

Now that astronomers have more or less determined that a new state of matter (free quarks) exists, have they set a precedent for more fierce competition with high energy physicists to discover new particles? What other possible macroscopic occurences of microscopic phenomena wait to be...

Thus is there a 5th dimension within atoms or external to atoms?will this be part of extended fields of limited Times or infinite Times? closed or open dimension?Life is a Song of SearchThe Uni-verse Sings on high.

Hello, I have a raspberry pi with a camera and would like to take some pictures with. Online, there are preloaded and not preloaded cards...What is the difference? Preloaded in what sense? For example: https://www.amazon.com/dp/B01LXR6EOA/?tag=pfamazon01-20 Not sure about the NOOBs either...

Hi All, I would like to make a glove with a small transmitter antenna on the index finger. A small receiver similar to a LoJack device would track the finger. The device would need to be extremely accurate to follow small movement (1 mm?) of the transmitter. I’ve made a device that uses an IR...

I am performing an experiment where I have built a scale model of a wind turbine, and am measuring the current it can produce with a micro generator. I am using a standard multi meter and the micro generator is DC. I do not know much about the topic, but whenever I start measuring the current...

Would it be possible for an "extra" dimension to be created if a microscopic black hole was made and maintained until it sucked in a mass (a person) and was "turned on and off" infinitely quickly popping in and out of existence so that the gravity doesn't kill a human but the "extra dimension"...

I've been reading several ideas postulated by some researchers using either Dark Matter and or a micro Black Hole as energy sources to power a future spacecraft . 1) using dark matter as fuel to power a spacecraft by taking dark matter into a cavity and shrinking it to critical point using...

Homework Statement A 1.3m×1.3m×1.3m cube of nitrogen gas is at 20∘C and 1.5 atm. Estimate the number of molecules in the cube with a speed between 700 m/s and 1000 m/s. Homework Equations P= (1/3) (N/V) (Mv2rms)The Attempt at a Solution 20oc = 293 K 1.5 atm = 151950 Pa Solving for N N=...

Homework Statement What is it: Practice Paper 1 b question for SL Economics IB Question: Discuss why it may be important for a firm to have a knowledge of price elasticity of demand. PS: It isn't stated explicitly to use a diagram, but my understanding is all Paper 1 questions need to be...

Dear All Gravitinos, I write this post here to discuss a new conjecture on resolutions of the schwarzschild singularity and the physics interpretation for the micro states of black-holes (arxiv: 1606.06178, published in Nucl. Phys. B2017,02,005...

What if the LHC produced a mini black hole and as a result a micro singularity was produced. If you were using Euclidean space time what equations and factors do you think would be most relevant?

Homework Statement I am preparing for my final and I am stuck on the following question Homework EquationsThe Attempt at a Solution My best guess would be to make some kind of next state table, but I don't understand the relationship between xT1, yT2, yT3 and any kind of table.

I have a story where an extremely advanced species has figured out how to produce and control kugelblitzes to a high enough degree that they can calculate the distance to an enemy and produce and fire one to explode at the target. Would there be any possible defense against such a weapon? I...

Does such a thing exist. I have a device that only has a slot to write data to a micro sd card. I have an external USB hard drive. Is it possible to hook up my external hard drive to the micro sd slot in my device? Like a male USB cable into the external hard drive that has a male micro sd...

http://gizmodo.com/frozen-tardigrade-brought-back-to-life-after-30-years-1753152359 Sorry if this is the wrong place for this post am only posting to get a few good responses if possible :). Is there any way we could extract the properties in the gnome of the tardigrade and genetically...

Say you had a crystal lattice box on a micro scale. You can push it with a bigger piston to accelerate it. Say it's lying on a friction-less surface (or this happens in minimal gravity and vacuum). My question is, would the possible kinetic energy that you can impart on this cube be quantized...

http://www.nasa.gov/centers/ames/research/exploringtheuniverse/blackbox.html https://en.wikipedia.org/wiki/Miniaturized_satellite Michio Kaku "The Physics of the future" CubSats are not really Nano/Micro Spacecrafts: Im: What are the best books about the theme?

Hi All! Haven't been here for some time, the changes are looking good! Anyway, formalities aside, I am having serious problems sourcing and implementing a suitable stainless steel (Grade: 304; thickness: 0.3mm) substrate for my etching process. I'm currently working on developing a...

Can one create a black hole when already inside the black hole ?

Looking at Ben Krasnow's youtube video on breaking down the parts and general cost for a scanning electron microscope, he lists a raster scan generator, is that able to produce the highest resolution images still? Or is there another more modern technology for this purpose? Otherwise, how has...

When experimenting with fusion, why do we always go so big and make extremely expensive reactors that take years to create and even construct facilities for? I've seen some failed attempts at making fusion happen in carbon nanotubes, failing in the sense that the carbon nanotubes are just...

off the top of your head can someone name a pic micro that has a adc, Ethernet and open tcp stack available for it. preferably in dip package, 40 pin is all my programmer can handle. I figure I should do something with my time so why not get started on my aquarium project.

Hi guys, My name is Rogelio H. Aguirre, a grad student from the University of Waterloo working on MEMS sensors. Currently, I am working with micro laser welding suppliers to fabricate the packaging of a pressure and a temperature sensor. I have some experience on weldings, but not in micro...

All that I've read about black holes describe something so massive it's gravity overcomes all other forces and it causes a region of spacetime to develop that no particle or electromagnetic radiation can escape from. That explanation since it depends on mass makes no sense in regard to...

I'm interested in standard curriculum textbooks on micro- and macroeconomics. No holding back on math rigour please, I get annoyed by the law of demand presented as a straight line.

[ mod note: moved from homework ] as a mechanical project we have been asked to design a micro steam car. we have chosen to use a wobbler engine for this. The aim of the project to see how far this car can travel based on a given amount of fuel. We are making a boiler which will provide the...

Hello, Always looking for answers to my questions, I had some answers like what micro black holes possibly created at the LHC (if it does not evaporate) would put millions or billions of years to be dangerous? I would like to know why Sorry if I come to you Ps : sorry for the way I did not...

I am trying to calculate the magnetic field (in tesla/gauss) of an iron core electromagnet that is very small and has very few windings. For example 12 windings over 0.003 meters. I know this is not going to produce a very strong field, but I would like to pulse a strong current through the coil...

My wife got me hang gliding lessons for Christmas, which I'm going to take this summer. In preparation I'd like to learn what I can about atmospheric behavior on scales of a few meters to a few kilometers. I've found small isolated sources with tidbits of information, but nothing with any real...

Hello everyone! New here to this forum! My question is...I race a 600 micro sprint here on the east coast. My car has a front and rear panhard bar. The frame mount for the rear is located on the outside of the right frame rail. The frame mount for the front is located on the inside of the...

Hi, I'm a freshman in college and a beginner in electronics. Does anyone know of a way to use a micro analog thermometer to change the color of a small LED light once it hits a certain temperature. I am looking to make this on an extremely small scale.

Hi! I'v been looking into this for way too long and have come to that point where nothing makes sense, hoping you guys could help me out! :smile: Basically i have been given a net head of 20m and need to provide a micro hydro turbine with 5kW of power for over one minute. What i want to...

Good Evening , i am post graduate student of Thermal Engineering.I have some experience to COMSOL software(but not expert atleast). So now i am doing a project on Modelling a Micro thermal energy harvestor. The problem goes something like this , there is strip made up of bimetal ( material of...

hello i need some help and am confuse about it now.. after calculating the math.. 1.67531519 x 10 power of negative 8.. if i change to nano it is 16nf? 1.515761363 x 10 power of negative 10, if i change to nano is 15nf? what about changing to miro? confuse with the 10 power of...

If the amount of hidden information inside a black hole, depends on the size of the hole, one would expect from general principles, that the black hole would have a temperature, and would glow like a piece of hot metal. But that was impossible, because as everyone knew, nothing could get out of...

Homework Statement This isn't homework, just pursuing some physics on my own and curious. Homework Equations So I've got 2 questions which have been sort of bothering me. 1-When I throw something into the air, does it stop for a tiny time at each molecule it meets (Newtons third law)...

Hello, I have a mechanical motion platform. It's only about 8 grams and about 5x5x5 cm. I'm a bit worried about the natural frequency and I want to mechanically damp it to slightly under-damped. I'm using phosphor-bronze for my spring elements, I'm not sure how much damping is intrinsic to...

Hello, would someone know where could one purchase a radial inflow microturbine of diameter 1 - 2 cm All I need is a contact web address or similar of the manufacturer or seller. Many thanks

Hi, I am very interested to learn something about micro controller system and work with these. But I don't know much about this so perhaps my question is going to be very stupid one. The thing that I want to know is that what is programmer or burner in a micro controller. Is it a device that is...

Homework Statement Hello, I am required to determine the total number of micro states of a system in equilibrium within a certain value, 1/σ. The number of micro states for this system is given by, \Omega...

A panel put out over 30.7 volts, say 34 volts and I have a micro-inverter that require a voltage of 11-30 to work. Other than shading some of the panel, is there a way to half the voltage from the panel without as much loss from shading some of the cells to work the inverter?

I'm looking at getting one of these for my tablet but would a female to female USB adapter on the end of the USB lead that came with my tablet work the same? Thanks

From theory, we know that Boltzmann entropy for a given distribution, defined through a set of occupancy numbers {ni}, of the macrostate M, is given by: S=k log(Ω{ni}) where omega is the number of microstates for the previously given set of occupancy number, {ni} . Assuming that the system...

Micro econ MR MC AC etc help! Homework Statement The adjacent graph (I've attached it) shows the short-run cost situation of a competitive, profit-maximizing firm. Assume that MC is plotted between units. Determine for each of the following prices: i) $150 ii) $200 iii) $230 iv) $350 a)...

anyone know how to convert decibel micro volt per meter to dbm?this term are using for rf electromagnet...tq..

I had an exchange with Lubos Motl about this topic, in the comments here. Very briefly, there is a 2004 paper in which the author (Kjell Rosquist) considers the old idea that the electron is actually a spinning, charged (i.e. Kerr-Newman) micro black hole. Using a purely classical model for...