What is Core: Definition and 484 Discussions

Intel Core are streamlined midrange consumer, workstation and enthusiast computers central processing units (CPU) marketed by Intel Corporation. These processors displaced the existing mid- to high-end Pentium processors at the time of their introduction, moving the Pentium to the entry level. Identical or more capable versions of Core processors are also sold as Xeon processors for the server and workstation markets.
As of June 2017, the lineup of Core processors includes the Intel Core i3, Intel Core i5, Intel Core i7, and Intel Core i9, along with the X-series of Intel Core CPUs.

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  1. RJLiberator

    How is speed of rotation of Earth's Inner Core calculated?

    I am interested in this. I'm looking for a simple answer and a more in depth answer (if possible). Any links regarding the math behind it would be great. Thank you.
  2. C

    How Do I Resolve Discrepancies in Magnetic Circuit Calculations?

    Fm = (500)(10/27) = 185.185 At Total flux = βA = (0.35)(0.003) = 0.00105 wb Rm = Fm / total flux = 185.185 / 0.00105 = 176366.6667 At/wb R(air) = (0.1 x10^-3) / (700)(4π x 10^-7)(0.003) = 37.894034 At/wb Rm = length / μA length = Rm...
  3. T

    How is average power calculated using volt-seconds and RMS voltage?

    If I have a voltage magnitude that I can modify, say I'm measureing the RMS of it. And that it is at a set frequency, and I want to know the quantity (that I am only just familiarising myself with) known as volt-seconds, on a coil and magnetic core. Say I was looking at how many volt seconds the...
  4. T

    Converting V-I Curve to B(t) Curve for Magnetic Core: Quick Guide

    Hey, I'm only asking this here because its a bit of a time-critical question (no pun inteded). But if one takes a V Vs I curve (like to measure BH without the equipment to measure flux directly), that is to say, measures the change of increase in voltage and increase in current (where current is...
  5. Dare Diamond

    Maximum Voltage To Apply To An Air core Electromagnet

    Hello everyone. I am glad I came across this science oriented Forum site. I actually get there from Google and what I am deeply curious to know about is the amount of Maximum Voltage my 3.5kg Air Core Electromagnet can bear. The Core of the Solenoid is 120mm in height and 13inches in...
  6. Stephanus

    Earth Core Temperature: Causes & Impact

    Dear PF Forum, Does the Earth core produces its own energy? If it is true, how? Radioactive decay? Gravity? Earth core temperature is around 4000 Celcius. Almost like the sun surface temperature. How can that temperature kept for 4 billions of year? Can the temperature heat the mantle and Earth...
  7. T

    Model an Inductor: Flux Through Core & Air Around It

    Hi, I'm just curious why we model the ideal inductor as having the leakage inductance as being in series with the ideal core, rather than in parallel to it? Because it would seem to me that the flux goes in two parallel directions, one through the core, and one through the air around the core...
  8. Lagraaaange

    Schools Upper level "Core" courses most important for grad school?

    Core being Thermal, Mechanics, E&M, Quantum? Say I graduate with a average 3.4 gap, but ace these courses, would Grad admissions care about a rough first year including Cs in Calc I and II and Bs in General Physics?
  9. E

    Simulation low frequency ferrite core recieving antenna

    Hi everybody i want to simulate, low frequency ferrite core receiving antenna . but i can't find a good and complete software or method to do this. what is your suggestion or experience? thanks for your attention.
  10. E

    Changing core for an inductor

    Suppose you have a pure DC supply with a constant current to an inductor. And you change the core of the inductor from air to iron, leaving the current remain the same. You may try changing to other materials. Does the voltage drop across the inductor will remain the same for any core? Anyone...
  11. Tony Stark

    Established core routers of the world

    Where are the world's Established core routers situated? On which major protocols do they run?
  12. Salvador

    Two magnetic fields interacting in single core?

    I have a question that I can't figure out , there is a toroidal transformer , and the core has an attached part on which another coil is wound. the main coil of the toroidal transformer is connected to a DC source. which creates a static magnetic field in the torus core. the other coil at the...
  13. T

    What Happens When a Transformer Core Reaches Saturation?

    Over the years I've learned a lot about TXs etc. But I'm a bit rusty. Any thoughts on general reminders about core saturation. I know there are huge issues, but the specifics I can't remember that well. I vaguely remember hearing something like when there is a DC component on a transformer the...
  14. S

    The Magnetic Field of Earth's Core: What is the Source?

    1) Is there any evidence that the Earth's magnetic field originates in the core rather than elsewhere? 2) Is there a compelling physical model?
  15. A

    Magnetic field solenoid with diamagnetic core

    For a solenoid as on the picture with a diamagnetic in the middle, the total B-field generated will come from both the free currents inside the solenoid as well as the induced magnetic field from the diagmagnetic material. But will the magnetic field attributed to the bound currents inside the...
  16. M

    Why is it important to use insulated wires in an electromagnet core?

    Hello everyone, I read somewhere that it is preferable to use insulated iron wires instead of a single iron core inside an electromagnet. Anybody has an idea on why is that and what difference does it make to use each? Thanks in advance.
  17. E

    Answer: Common Core Math: Multiply & Divide 2-Digit Numbers Intuitively

    47 x 62 = ? (40+7) x (60 + 2) 40 x 60 + 40 x 2 + 7 x 60 + 7 x 2 2400 + 80 + 420 + 14 2480 + 434 2914 Consider a rectangle with dimensions 47 units by 62 units. The rectangle can be subdivided into four smaller rectangles: 40 x 60, 40 x 2, 7 x 60, 7 x 2. So when kids multiply two...
  18. magnetpedro

    U-Shaped Ferrite Core Inductor question

    I'm using a U-Shaped Ferrite Core with coils in both legs of the U. I've calculated it's inductance using an analogy between electric/magnetic circuits. L = N2/Rtotal where: N = number of turns of coil in both legs of the U; Rtotal is the total reluctance of my circuit = R1 + R2 R1 =...
  19. A

    Transformer with open iron core?

    Hello everyone, I'm not sure if the title makes sense, but I'll try to explain it a bit better here. So, if we have a transformer with an open iron core (U shaped iron core, with coils wrapped around each side, same number of coils, same thickness), why is the electromagnetically induced emf in...
  20. S

    How can I obtain a soft iron core for my electromagnet experiment?

    Hi, I am planning to conduct an experiment using electromagnet but I could not find the soft iron core. My school lab doesn't have it, and I tried asking around in shops which sell electrical appliances and shops which sell science apparatus but nobody seems to sell it. Does anyone know where...
  21. T

    Gravitational Force on a Particle in Jupiter's Core

    Homework Statement Jupiter has a core of liquid metallic hydrogen, with uniform density $\rho_c$, with radius $R_c$. This is surrounded by a gaseous cloud $R_g$, where $R_g>R_c$. Assume the cloud is of uniform density $\rho_g$. The problem also specifies that we are to assume both regions of...
  22. lputput

    What Would Happen if Earth's Core Suddenly Disappeared?

    What would happen if the core of the Earth suddenly disappeared? Would the gravitational field it emitted immediately disappear because the mass at the center disappeared. Would the surrounding Earth collapse into where the core used to be because of it being pulled there or would a new center...
  23. M

    Calculating the radius of a star's core

    Hi, I'm trying to make a simple model of stellar evolution for a game project of mine, but I'm not sure how to predict the radius of a star's core without reference to its surface radius. I am trying to derive the surface radius from the amount of energy being released by the core. The goal is...
  24. C

    Joule thief : number of turns around the ferrite core

    Hi everyone, I have to build a simple Joule thief circuit for school. Here it is :(http://upload.wikimedia.org/wikipedia/commons/8/83/Joule_thief.png). The resistance of the resistor is fixed to 1 kOhms, the voltage across the "dead battery" is about 1.5V, the transistor needs about 0.7V to...
  25. Syed Alam

    Hot Channel Analysis of Small PWR core

    I am currently working on thermal-hydraulics of a small PWR. The configurations are: Thermal power (MWth) 333 Core height is 1.8 m Pressure (MPa) 15.5 Total rod diameter (mm) 9.50 pin pitch (mm) 12.65 Pitch/diameter ratio 1.33 Flow Area (m2) 8.92E-05 Intlet mass flow/area (kg/m2/s)...
  26. Dotini

    Earth's inner core has an inner core of its own

    Thanks to a novel application of earthquake-reading technology, researchers have found that the Earth's inner core has an inner core of its own, which has surprising properties that could reveal information about our planet. http://www.sciencedaily.com/releases/2015/02/150209113222.htm The...
  27. S

    Troubleshooting Transformer Core Loss Simulation Error

    Hello Engineers, while simulating transformer core losses in transient Maxwell sollution, I have got an error: Current leak to the air. does anyone ahev idea to solve this problem Thank you
  28. PsychonautQQ

    Why is the core of a subgroup contained in the subgroup?

    Let H be a subgroup of G, then: Core H = {a in G | a is an element of gHg^(-1) for all g in G} = The intersection of all conjugates of H in G My book goes on to say that every element of Core H is in H itself because H is a conjugate to itself. Previously, I understood that H was a conjugate to...
  29. T

    Exploring the Milky Way's Core Jet: A Puzzling Outflow

    Milky Way core drives wind at 2 million miles per hour -- ScienceDaily http://www.sciencedaily.com/releases/2015/01/150105182525.htmThe article graphic shows three distinct flows of material... One moving towards earth One moving away from earth And One with no net motion along the line of...
  30. S

    Transformer core variable reluctance

    Hi , When DC is applied to a transformer there is no secondary induction because DC current creates no changing flux in the Core. If I could change the reluctance, or permeability is another word I guess, of the transformer core while still having DC applied to the...
  31. M

    Magnetic field with and without ferrite core

    An air core circular coil of n turns produced a magnetic field of (for eg) 0.5 tesla at a point in space (not within the coil nor along the axis of coil). If a ferrite core of μr (relative permeability)=200 and of the same length of the coil is inserted into the coil what happens to the magnetic...
  32. T

    Anyone know anything about magnetic amplifiers?

    Hi, I was wondering if anyone knew if you could use a magnetic amplifier: http://en.wikipedia.org/wiki/File:Magnetic_amplifier.svg as like a variable resistor for controlling current from the source to the load? I imagine there would be a large voltage imposed across it when it is a high...
  33. P

    Heat the core of an object or a specific point inside the object?

    hello! is it possible to heat the core of an object or a specific point inside the object? or are there specific objects we can do that? obviously after heating a specific point inside the object, the rest of the object will conductively heat up too, but I wonder if there is a way to...
  34. M

    How Can Nuclear Plants Improve Emergency Core Cooling Systems?

    For dealing with different types of loss of coolant accident (LOCA), pressurized water reactors (PWR) have emergency core cooling system (ECCS). ECCS are simply redundant pumps to inject water into core to cool fuel, thus preventing fuel melting in case of an accident (hypothetical) that involve...
  35. S

    Astrophysics - triple alpha core Temp

    Homework Statement Explain why stage 1 and 2 of the triple alpha process will not being until the core Temp of the star is around 10^8K. Homework Equations 4He+4He = 8Be (step 1) 8Be+4He = 12C (Step 2) The Attempt at a Solution I "think" I need to work out the nuclear energies... However I...
  36. S

    Power in Sun's Core: Comparing 10^26 W to 276 W/m^3

    I'm curious about something I read comparing the power released in the core of the Sun being comparable to a compost pile (~276 W/m^3). This seems very low (Wikipedia confirms this value). The value I find for power in the core is on the order of 10^26 W, and using the volume of the core of...
  37. V

    Matter at the core of neutron star

    How would you approximately describe matter in the core of underlying neutron star? I am asking for really fundamental properties. No strange matter, consider just n,e,p. A ratio, can we describe particles as free? Gas x fluid x superfluid? etc.
  38. K0DPW

    Earth's Magnetic Field and Core

    Given the increase in geophysical phenomena (such as earthquakes and volcanic eruptions), it is obvious "something" IS going on with our planet. I have no trouble believing in this theory that a reversal of the Earth's magnetic field may be included -- sooner as opposed to later. However, no...
  39. A

    Optimizing Refractive Index for Bright and Even Side Glow in Solid Core Object

    Hi All, I'm trying to create something which has a solid, cylindrical, non-reflective core (assume the core is made out of a black rubber similar to that of a car tyre for instance and 20m in length, but only 1cm in diameter), which has a translucent or transparent plastic layer (or several...
  40. avito009

    Why is stellar ash found in the core of a White Dwarf so dense?

    A normal star's core consists of Hydrogen but a white dwarf is itself the core and it consists of stellar ash. So the degeneracy pressure is exerted when this stellar ash becomes very dense (In other words when the white dwarf becomes very dense). Am I right? The density of a white dwarf is so...
  41. M

    If the earth's core was to abruptly turn solid

    How long before our magnetic field disappeared and how long after that would we be dead due to radiation?
  42. S

    Ferrite core size and number of turns for transformer design

    hello. I'm designing a 100w 4Mhz class E amplifier. I need a ferrite core transformer for impedance transformation and load isolation but unfortunately I lack the knowledge required for designing it. if anyone could guide me to a good book or a web page, or simply give me some formulas I would...
  43. M

    How was the core temperature of sun estimated ?

    It was estimated that the heat inside the core of the Sun inside around 15 000 000 °C - this value is extremely enormous. How did scientists estimate this value?
  44. H

    What Triggers a Supernova Explosion During a Star's Core Collapse?

    So at some point nuclear fusion in a star becomes unable to sustain the core against its own gravity pressure, then the core collapses and the surface explodes in supernova explosion. What actually happens when the core collapse that makes the surface explode, and why would the core not explode...
  45. M

    AC Electromagnet Core Material

    I'm attempting to build an alternating current electromagnetic coil and want to maximize its potential field. My initial query was to find the very best core material for the electromagnet. I found an older post (2005) on the subject and saw some very interesting answers there. Being new here...
  46. W

    The 15 Million Degree Pinhead: The Sun's Core Materialized on Earth

    Is it true that a pinhead size if the Sun's core if materialised on the Earth would be too dangerous to go within 90 miles of it? I read from Wikipedia that the energy produced in the Sun's core is about 270 watts/m3. About the same as an active compost heap. I know the pinhead of core matter...
  47. D

    Solenoid to fire magnetic ball, question about best core material)

    So I want to fire a magnetic ball through a solenoid coil but want to know if core material can enhance the performance. Would wire wrapped around soft Iron tube core work better then say a thin copper tube? The aim is to increase efficiency so less power needs to be used to fire the magnetic...
  48. W

    Laminated iron core inside a coil magnetic field question

    A laminated iron core was inserted into a coil with an AC current flowing in the coil. 1.The current in the circuit decreased after inserting the core. 2.Also the magnetic field was found to be stronger on the outer edge than in the center of the laminated iron core. How to explain the fall...
  49. Y

    How Does Water Affect the Inductance of a Coil?

    water as coil "core" How much a coil inductance of 0.1 mH (3 cm long, some 50 turns wound around 5 cm diameter empty plastic pipe) may change when water enters the pipe ?
  50. R

    Steel Soap bars: magnetic core, solid?

    I bought a Stainless Steel soap bar and it works, it just does. It was from China and hollow inside and I would like to know if that's either a cost cutting measure or how the bar works? What would happen if it were solid? Another thing would be if it had a magnetic core, or made from a metal...
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