Micro Definition and 103 Threads

Hi everyone! I would be so happy if someone could help my little brother and I answer a question for a science project that we have researched ineffectively for hours. We hope to design the most efficient propeller for micro-wind turbine. The purpose of this propeller is to naturally rotate when...

Hi, I've already made a question and recently received a reply. My question is how does a microcantilever have a torsional resonant mode. We generally study a longitudinal mode, not so much considering the torsional mode. The man who replied to my question said "It's because of...

Hello guys, There is something that I should study but is not on my book. I am trying to find other explanations online but I can't. So, it's pretty much to calculate quantity and price for perfect competition and monopolistic competition. Then, consumer surplus for perfect competition...

Hello, I have been learning about Cobb-Douglas Utility functions and Cobb-Douglas Production functions. Some of the reading I have incontured have left me confussed. Does anyone know how the utility function difffers from the production function in terms of explaining the exponents. I know...

I'm a new poster; I hope don't violate rules or policy. Am I wrong, or is the rule essentially that a particle isn't finished interacting with the last particle on it's world path unless and until it interacts with a third? This isn't what I might have guessed about physical continuity, but it...

I have this question: "What micro-structural features of metal alloys can be studied by using equilibrium diagrams and how? Can the equilibrium diagrams be used for some other purposes? What are the limitations?" I think that only the composition of micro-structure can be predicted in a...

Homework Statement Im trying to design a Rainfall Driven Micro Hydro-Generating System Under normal operation, the generating system is expected to produce 30 W at 12 V regulated DC. Is there any relation between the length of the water pipe, the speed of rotation of the turbine and the...

Homework Statement I need to design a Rainfall Driven Micro Hydro-Generating System Under normal operation, the generating system is expected to produce 30 W at 12 V regulated DC Homework Equations 1st how to calculate the flow of rainfall 2nd: what are the formulas that I should use...

i am in no way a engineer so i need help i just bought (MICRO SWITCH, PIN PLUNGER, SPDT 16A 250V; Microswitch Type:Standard; Actuator Style:Pin Plunger; Operating Force Max:100gf; Contact Voltage AC Nom:250V; Contact Current Max:16A; Switch Terminals:Quick Connect; Circuitry:SPDT) and it...

Hi, I'm researching a potential masters project involving incorporating piezoelectric crystals into a ceramic so that when a load is experienced the electric field generated encourages the electroplastic effect in the bulk phase so that it becomes more plastic and inhibits crack formation...

I was playing around with some equations and I found a reason why I think micro black holes cannot exist. This proof requires a few assumptions which I have tended to find to be a scientific consensus. They are the following. 1) The smallest mass a black hole can have is the Planck mass which...

hello, this is regarding my project which is detergent control system that need microcontroller 18f4580..but there some error when i run using MPLAB, I'm not sure what was that. can anybody help me,, #include<p18f4580.inc> ORG 0000H GOTO MAIN ORG 0008H BTFSS PIR1,ADIF...

Problem with Cruzer micro 8.0 gb.please help I have a Cruzer micro 8.0 gb and when I attach it to the computer I clicked to open it a message appeared and says `the disk is not formatted do you want to format it` but it appears to be 16 mb .my flash memory wrote in it bl0807kveb made in china...

Hi, I'm looking at controlling about 14-16 different outputs, 2 DC motors, 12 Infra Red scanners and 1 Ultrasound component on a robot. I assumed I would have to build a circuit board from scratch, but I have discovered you can implement a MC instead. But, are there such pieces of hardware...

I was wondering how to rule out the hypothesis that most of dark matter is due micro - MACHOS, that is, if a considerable part of it is due to objects like those of the Oort Cloud and Kuiper belt.

I just want to verify that the dipole moment \vec{m} in the presence of external magnetic field \vec{B} will line up in the the same direction and parallel with the external field. This is according to the right hand rule that if magnetic field is the direction of the thumb, the current will...

Why is internal energy not sufficient to compare states? Thank you for your answer.

Hey. I've been trying to find a really small, micro water pump, direct current, in-line 2.5"x1.5" maybe slightly bigger, but preferably tubular in shape and as small as possible. Looked on ebay to no avail. Any ideas? It has to be cheap as well, something under $50. Oh and 1-2 GPH flow...

Looking into “reverse engineering” a pump and running it like a turbine and using an induction motor of some sort generate power. Basically design/build my own micro-hydro power system. The system if I do go ahead with it, will be connected to the grid. I am very capable of handling the...

I have to design a micro pump which uses a magnet as a plunger. the magnet is pushed and pulled by and electromagnet whose current can be controlled. I wanted to know that how do I relate the current in the electromagnet to the amount and flow rate of the fluid expelled by the pump. The...

hey guys...i'm looking for a micro-controller to toy around with. I'm a newbie so bare with me with a couple newbie questions...Is their a micro that can run straight c code or do I have to do it in assembly? I need it to be able to store a little bit of data much like a variable stores...

I am an Electrical & Electronic Engineering student who has previously used a PIC micro controller for one of my previous college's projects, in that case we didn't have a choice we had to use that particular micro controller, partly because all the class using the same would be easier to teach...

I need a little help with a lab project that I am making for my Micro Processor class. My instructor gave me the idea of making a gun chronograph. He wants me to use 4 qrb1134 reflective sensors to detect an object. The qrb1134's will be in two pairs set at a certain distance apart. The...

Hi, I'm preparing a presentation for micro forming, but I'm totally new to this topic. May i know what should i include in the the discussion as a topic of "micro forming of material" My current plan is: 1. What is micro forming. 2. Three micro forming of metal: massive forming, sheet...

Does expansion exist on the micro level as well as the galactic level? I've never read about it, but it occurs to me that there can be no uniqueness about where the expansion of the universe exists. I have to envision an atom as a 'kind' of solar system, and a molecule therefore as a...

So here's the situation: A few months ago, my dad decided to try a free internet security trial from Trend Micro. It simply involves downloading updates about once a day, and a routine scan for potential viruses. Everything was fine for the first few months, but just today it reported that...

Hi all, I was wondering if anyone knew, or if anyone knows where I can find, the maximum magnetic field that a micro - electromagnet can put off... I am sure this depends on a lot, but I just need an estimation as I am running a simulation and need a typical value. I ran the simulation with...

Hello Gentlemen, I'm in need of a miniature liquid flow sensor capable of measuring liquid flows in the mili and possibly high micro ranges that is quite accurate. I seem not to find much on the internet as most of the sensors are for greater flow capacities. Any help would be much...

Hey guys, new user old reader here:blushing: wondering if you guys could recommend me some stuff. I am after a complete off the shelf micro liquid delivery system which can provide liquid flow in the micro scale.. any suggestions would be much appreciated. Miles

Some one has put a devise in me and you clever people of the world may be my only saviour. It must have cost a fair bit because it can move around,inflict pain and irritations to say the least. The point is,if its metal, Mri scan is out. X ray,ive tried no show(it moves) Would trying to take...

so i found a manual for a small HV device, using a flyback, powered by DC supply. here's the link for the http://tacashi.tripod.com/elctrncs/555sstc/555sstc.htm" i built a small platform giving the primary coil 8V in frequency which in theory should be around 20 KHz(i do not have an...

Hi, can anyone please help with my project of building a portable miniture Gas (butane)powered oven. Approx a 1" cube or ball shape? Needs to be able to raise temp quickly, and hold even oven temp of approx. 200Deg. Celsius... Thanks, Richard

I have recently been reading Moment of Creation by James Trefil, and I have stumbled upon the question, where has all the antimatter gone? I asked myself, what if micro black holes produced by the tremendous energy at the big bang are the answer? If you have an understanding in hawking radiation...

When I read the security report from Cern (not that I am too worried), I came to something, which I do not fully understand: As we all know, we are save from micro black holes created at the LHC because of Hawking radiation (for one of many reasons). The Cern people push this argument further...

This baffles me, because the device outlined below could create energy ... Theres two tanks A & B with a microscopic gate between them Air in A & B starts at say 25 degrees whenever a faster than average moving molecule approaches the gate in A a sensor opens the gate and let's in pass...

What are miniature black holes at a quantum level? What does string theory say?

In the air, and I tried hitting it with my hand, would I now have a hole there?

What I need is that when a certain key (on a keypad) is pressed it would output a corresponding binary number. I have completed this with an HC11 in assembly language. My professor says that the HC11 is over kill and that a micro pic would do this for little money. I am new to micro pics and...

looking to design and hopefully build a micro-tensile tester to test the properties of human hair. as part of my uni class I need to design the grippers involved and have a look at non contact extensiometers. Could anyone point me in the right direction with some links or books? or even...

[SOLVED] Can someone check my precision for a meter stick, vernier cailper, and micro Meterstick Precision: 1 mm Example: 607 mm Vernier Caliper Precision: .1 mm Example: 41.5 mm Micrometer Precision : .01 mm Example: .05 mm what I'm asking basically is, is the precision I...

Has anyone here micro etched material? I'm going to start learning the process of micro etching and have the oppertunity to do it to a bolt. I'm wondering what purposes it would serve... I know that from micro etching, you can see how a certain product has been formed from the lines, is this...

I need to rectify 100micro v ac to 1 v dc. can u suggest a good rectifier schematic. The most rectifier circuit i found on google did to wrok in this micro volt range.

hi all! I am not a physics but enginereing major. I am confusing about what's going on with heat tranport in micro- scales. I encounter terms like phonon-electron interaction, electron gas, lattice etc.. What exactly is a phonon? does it posses mass? What is electron gas? Could anyone...

Q1. A 10,000 Micro Farad capacitor has an asymmetric tolerance specification of +20%/-50% What is the possible range of values for this capacitor? How do I do this problem ? Q2. A 15-bit A/D converter has V(full scale) = 10 V. what is the value of the LSB> If the input voltage is 6.83 V...

I have a limited understanding of how nuclear devices work and understand the basic physics related to fusion and fission. However whilst I do not believe the latest assertions by Bashir the cleric from Indonesia who reckons the CIA set off a micro nuclear device in Bali - rather than it...

Does anyone have any ideas on how to construct an electromagnetically actuated micro pump? If so, please post.

What are the equations used to determine the streamflow and lift for Micro Aerial Vehicles? What are the problems with MAVs?

Thermodynamics treats with macroscopic systems, where statistical mechanics make sense. In these systems there is an arrow of time following the second law. On the contrary, temporal reversibility is generally seen at microscopic level. What is the limit (magnitude order in number of...

Why do we use two channels in MICRO ARRAY analysis ?? LIke red and Green ?? What does the ratio between red/green signify ??

Hi all, can somebody please advise whether the below answer is correct... or am I on the right path?? Q: What maximum current is delivered by a 2.2 Micro F capacitor when connected to a North American Outlet where Vrms = 110V and f = 60 hz? my answer: I = Vmax / XC XC = 1 / wC =...