Conduction-vs-induction

Best Results From Yahoo Answers


From Omilili

Magnetic Trigger vs. Hall Effect Trigger

What is the general opinion as to whether a Magnetic trigger is preferred versus a Hall Effect if I should purchase a distributor with: [A] a Magnetic trigger -or- [b] a Points trigger and transplant that produce an AC voltage using magnetic induction. An iron reluctor wheel spins past a permanent

Shrink fit vs Hydraulic

Us info on both Rego-Fix powRgrip and Techniks shrink fit systems. The Techniks holders are a little cheaper (and made in Taiwan) but the (definitely low-end) induction heating system is 4Gs . The shunk hydraulicsystem works a treat. You won't regret spending on these. Quote: : Newell I have

Humcancelling vs. single coil

The sound of that bass. It's got true single coils in it. I just bought a Fernandes J and some Dimarzio we need to make two smaller coils instead of one big coil. This changes the inductance of the pickup... cover we need to make two smaller coils instead of one big coil. This changes the inductance

Supercharger vs turbo forced induction

I've been thinking about a roadmap for a forced induction project for my S2. I was following Carl for those who want to keep their ac, which is why this kit was developed. I have not done any tuning the front side of the belt, but I don't see how that could be done for those who want to keep their ac

From Yahoo Answers

Question:This is an experiment in which a carboy is filled with one of the gases, hooked up to a manometer and then the top of the carboy is taken off, and quickly replaced.

Answers:Sommerfeld on Thermodynamics: Thermodynamics is a funny subject. The first time you go through the subject, you don't understand it at all. The second time you go through it, you think you understand it, except for one or two small points. The third time you go through it, you know you don't understand it, but by that time you are so used to the subject that it doesn't bother you any more. I. Temperature Scales T TEMPERATURE SCALES Comment: Celsius (no longer "centigrade") vs. Kelvin (units "Kelvins," not "degrees Kelvin") Comment on Fahrenheit and Rankine Rankine made mistakes in calibration leading to strange values for freezing and boiling points. II. Molecular Motion and Temperature/Gas Laws D I6-11: BROWNIAN MOTION WITH TV D I6-01: GAS PRESSURE - MODEL D I3-33: HELIUM BALLOON ON LIQUID NITROGEN D I3-52: CONSTANT VOLUME GAS THERMOMETER - ABSOLUTE ZERO T Graph P vs. T and estimate absolute zero T Zeroth Law of Thermodynamics Comment: Defines fundamental property of temperature D I4-52: CARBON DIOXIDE BALLOON ON LIQUID NITROGEN (page 2) III. Thermal Phenomena THERMAL EXPANSION D I1-11: THERMAL EXPANSION - BALL AND HOLE D I1-13: THERMAL EXPANSION - BIMETAL STRIP Comment: Bimetal strip thermostats Comment: Lava lamp D J7-13: CURIE POINT OF NICKEL D K6-21: HEATING IN CURRENT-CARRYING WIRE Comment: Superconductivity Comment: Thermoelectricity (Fan) Comment: Rubber, etc. at LN temperature D I1-74: SHAPE-MEMORY ALLOY - CLOVER Comment: Thermobile engine Comment: Shape memory alloy (used in space antenna applications) Comment: Originated in NASA invention contest IV. Heat Transfer Radiation D I2-06: THERMOPILE WITH AUDIO OSCILLATOR D N1-01: PRISMATIC SPECTRUM OF WHITE LIGHT - POINT SOURCE Use with thermocouple device from I2-06 Comment: Heat waves similar to light waves Comment: Light bulb and hand experiment D L3-18: FOCUSING OF HEAT WAVES - OVERHEAD PROJECTOR Conduction D I2-21: THERMAL CONDUCTIVITY OF METALS Mention: LEIDENFROST PHENOMENON (cooking pancakes) Comment: THERMODYNAMICS BY TOUCH (page 3) Convection D I2-43: CONVECTION - HOT PLATE Comment: feeds oxygen to fires, etc. D I2-44: CONVECTION - CANDLE IN CYLINDER Oxidation and Burning D I1-62: DUST EXPLOSION MODEL D I1-61: DUST EXPLOSION (with full regalia!) V. Laws of Thermodynamics LAWS OF THERMODYNAMICS T First Law of Thermodynamics D I5-01: MECHANICAL EQUIVALENT OF HEAT - SHOT BAG D I5-02: TRANSFORMATION OF MECHANICAL ENERGY INTO HEAT D I5-22: FIRE SYRINGE Comment: Basis for Diesel engine Comment: Rubber Band Engine Comment: Rubber heats when expanded T Second Law of Thermodynamics Comment: Cannot convert energy with 100% efficiency Therefore: No perpetual motion machines (page 4) VI. Atmospheric Thermodynamics D I5-15: ADIABATIC EXPANSION OF CARBON DIOXIDE D I5-12: ADIABATIC EXPANSION OF AIR - FOG IN BOTTLE Example: opening cola bottle Comment: Hydrogen Bomb white cloud is ice crystals T Normal atmospheric situation on a sunny day Comment: Adiabatic lapse rate = 5.5oF per 1000 feet T Temperature inversion - nights and cloud cover Comment: Two effects: -sound transmission at night -pollution S Pollution enhances sunset, with which we close the program

Question:Locomotives that use Dynamic Braking with DC traction motors excite the field coils of the motors and turn them into energy producing generators. AC induction motors don't have that option since there are no windings on the rotating armature and there are no slip rings. When used as a traction motor, there are short circuited windings on the rotating armature that produce magnetic fields when rotated in magntic flux fields produced by three phase rotating fields in the outer windings. It would seem that for these traction motors to produce electricity that they must have additional windings on the rotating armature or permanent magnetics installed. Other articles on AC locomotive dynamic braking say that an induction motor is used with no slip rings. If so then how can the traction motor be turned into an alternator?

Answers:Induction motors that are controlled using variable frequency drives VFDs), become generators and produce braking torque when the applied frequency is reduced. The VFD continues to provide magnetizing current, but the phase relationship between the current and voltage changes such that net power is returned from the motor to the VFD. The VFD can be equipped with a converter that will return power to the source in the same way that a DC converter returns energy to the source. It is difficult to explain how this works without diagrams. I will try to find some reference material on line and post links. Edit 1 The speed vs. torque curve for a typical induction motor is shown here: http://i13.tinypic.com/730cfhy.jpg In normal operation, the motor accelerates quickly through the orange part of the curve when it starts and operates in the green part of the curve. Note that the motor only produces driving torque when it is operating at less that 100% (synchronous) speed. If the load were to make the motor operate above 100% speed, such as could occur when an electric locomotive is going down hill, the motor operation moves into the red part of the curve. As operation moves from the green part to the red part of the curve, the torque produced by the motor drops to zero and becomes negative. When the motor is producing negative torque, it is acting as an induction generator. It is braking the load and generating electric power with the energy received from the load. Edit 2 The Wikipedia article, http://en.wikipedia.org/wiki/Power_factor, explains that when AC voltage and current waveforms are in phase with each other, the instantaneous value of the power is always positive. When the current and voltage are not in phase, the power is negative during part of the cycle and positive during part of the cycle. The net power transferred to the load is less than the RMS load current multiplied by the RMS load voltage. In an induction motor, that means that, in effect, part of the current is being used to generate the magnetic fields in the motor and the rest is being used to transfer power. When the motor load is reduced to zero, the current that is being used to generate the magnetic field remains relatively constant, while the current due to the load is reduced to zero. A small percentage of the current is also caused by losses in the motor resulting in heat. When the motor torque is reduced to zero, the current is reduced something like one third of the full load value, but the phase relationship changes so that very little power is transferred to the motor. When the load torque becomes negative, the current increases and the phase relationship changes so that power is transferred from the motor to the source. This all happens due to the inherent characteristics of an induction motor, no control action is necessary. However, with a variable frequency control unit, the motor s torque vs. speed curve can be adjusted to make the crossing point from positive to negative torque occur at any speed. That makes it possible to provide braking or accelerating torque as desired.

Question:I want to find out if the label that says how much fat the chips contain is actually true.

Answers:You would have to extract the fat from the potato chip in some organic solvent, after measuring its mass, then you will have to determine the mass of salt that precipitates out as well to get the net mass of the salt-less potato chip. If you know the identity of the fat you could do an quantitative NMR experiment, but if not then you're better off doing HPLC (for this technique you'll be require to prepare standard solutions of fat to get a graph relating intensity of peak vs concentration). I hope this was helpful to you.


From Youtube

A War On Science - Evolution Vs Intelligent Design - Part 5

BBC Horizon - A War On Science - Evolution Vs Intelligent Design Part 1 www.youtube.com Part 2 www.youtube.com Part 3 www.youtube.com Part 4 www.youtube.com Part 5 You Are Here Just under half of Britons accept the theory of evolution as the best description for the development of life, according to an opinion poll. Furthermore, more than 40% of those questioned believe that creationism or intelligent design (ID) should be taught in school science lessons. The survey was conducted by Ipsos MORI for the BBC's Horizon series. Its latest programme, A War on Science, looks into the attempt to introduce ID into science classes in the US. Over 2000 participants took part in the survey, and were asked what best described their view of the origin and development of life: 22% chose creationism 17% opted for intelligent design 48% selected evolution theory and the rest did not know. Intelligent design is the concept that certain features of living things are so complex that their existence is better explained by an "intelligent process" than natural selection.

MGS4 - Solid Snake vs liquid Ocelot part - 2

Not me playing-history of the two Solid Snake, real name David, is a product of the Les Enfants Terribles project and "son" of legendary soldier, Big Boss along with his "brothers" Liquid Snake and Solidus Snake. He is known as "the man who makes the impossible possible" and his exploits have made him into a living legend among the mili tary black-ops. Initially a Green Beret, Snake was later inducted into high-tech special forces unit FOXHOUND during the early 1990s while it was under the leadership of Big Boss. From there, Snake would thrice avert potential nuclear catastrophe and even slay his "father," Big Boss. After the Shadow Moses Incident and subsequent manipulation campaign by the Patriots, the secret organization behind American politics, Snake became labeled a terrorist. He faked his own death in 2007 and proceeded into hiding, although he would later emerge in 2009 to assist Raiden in the Big Shell Incident. About five years later, his cells would enter an advanced stage of degeneration due to being a clone created from early cloning technology. His body began to age very rapidly, causing his health to decline. The extent of his rapid degeneration was predicted by Dr. Naomi Hunter, who estimates that he only has six months left to live. Liquid Snake- liquid Ocelot Nationality British Affiliations FOXHOUND SAS Current status Deceased (As Liquid Ocelot) Liquid Snake (commonly referred to as Liquid) is Solid Snake's twin brother and genetic duplicate, along with ...

Ottawa University Video Data Conventional Generater vs Regenerative Acceleration Generator

This video data represents a Conventional Generator output vs the Regenerative Acceleration Generator output under identical conditions - rotor speed and torque. Conventional Generator Output = 0.8 Watts Regenerative Acceleration Generator Output = 32.7 Watts Regenerative Acceleration Generator Output Increase = 4025% over the Convetional Generator. Potential +/- Difference Inc. - Regenerative Acceleration Technology The Current Energy Paradigm In a nutshell Regenerative Acceleration Technology represents a new energy generation paradigm. For example, when a Conventional Generator delivers power to a load the generator causes the prime mover (whatever is turning the generator) to DECELERATE. This is commonly referred to as Regenerative Braking in an electric vehicle. The more power the generator delivers the greater the rate of deceleration. New Energy Paradigm PDI generator technology, on the other hand, does NOT cause the prime mover to decelerate under load in fact it causes it to ACCELERATE. It is referred to as Regenerative Acceleration. When applied to electric vehicles the technology will not only supply power to the batteries but it has the capacity to accelerate the EV as well. The more power the generator delivers the greater the acceleration. This is a 180 degree paradigm shift from conventional generator operation. The How and Why This is accomplished by forcing the inductive generator coils to operate at higher frequencies where the coils impedance (coil AC ...

SSD vs HDD Speed Comparison: OCZ Vertex 2 vs. Samsung 5400rmp

How the test was conducted / How to upgrade your computer? Read more below... WHAT IS THIS VIDEO? Speed comparison between my old HDD and my new SSD drives on real applications, not with benchmarks. HDD: Samsung 500GB 5400RPM SATA-300 2.5" (HM501II) SSD: OCZ Vertex 2 240GB SATA-300 2.5" (OCZSSD3-2VTX240G) System: Macbook Pro 13", 2.53GHz Intel Core 2 Duo, 4GB DDR3 1067MHz HOW WAS THIS TEST CONDUCTED? Preview shows two screen capture videos that were run on the same system. The data from the HDD was cloned to the SSD and the computer was booted twice, with each hard drive. The old video contains comments on what is currently tested; the reviewed software is: iTunes, Safari, Microsoft Word, Photoshop. The video shows how much time it takes for each app to load on each drive. The SSD is much - much!! - faster. The startup time of the system is: HDD: 1 min 5 sec SSD: 16 sec The experiment is very precise. Before recording the video, each system was restarted 3 times in a row (you will not believe it, but the system restarts faster and faster each time). HOW TO UPGRADE YOUR SYSTEM? In order to upgrade your system, you only need to replace the the hard drive with a new ssd drive. Vertex 2 is, according to several reviews, the fastest SSD you can get in December 2010. After you buy the SSD, you can replace it yourself very very easy following this tutorial with images (link below). After that, reinstall the MacOSX from your installation DVD that came with your mac and choose ...


Warning: mysql_close(): supplied argument is not a valid MySQL-Link resource in /edu-source/cbsenext/cfw/index.php on line 550