Electrical Engineers

Discussion in 'Political Opinions & Beliefs' started by ImNotOliver, Apr 3, 2021.

  1. Kal'Stang

    Kal'Stang Well-Known Member

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    And yet, if it wasn't for those rag tag collection of farmers, loggers, and truck drivers...Portland wouldn't have s***. Hell, they wouldn't even be able to wipe their asses with toilet paper if it weren't for them.
     
  2. ImNotOliver

    ImNotOliver Well-Known Member

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    Too abstract to wrap your mind around?
     
  3. kriman

    kriman Well-Known Member Past Donor

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    Nope. Only meaningless to use made up numbers.
     
  4. ImNotOliver

    ImNotOliver Well-Known Member

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    Did you notice that the Oregon Ducks were mostly unknown outside of Oregon until Phil Knight gave the University of Oregon something like a half a billion dollars to upgrade their athletic department. Suddenly they were one of the top college teams in the country. Most of the basketball and tennis playing surfaces in Portland and Salem area parks are as good as they get, thanks to Nike.
     
  5. ImNotOliver

    ImNotOliver Well-Known Member

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    Last edited: Apr 8, 2021
  6. Doofenshmirtz

    Doofenshmirtz Well-Known Member Past Donor

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    Last I checked, the elderly (Over 80) had a 92% survival rate. More than age, underlying health conditions put people at the highest risk. Most of these conditions are caused by diet consisting of government subsidized foods.
     
  7. 557

    557 Well-Known Member

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    Absolutely. California produces more than other states put together. The FACT remains, over 55% of fruits and vegetables consumed in the US are imported from other countries. I know you stink at math, but if 55% of produce comes from other countries, even if no other states produced ANY fruits and vegetables your statement could not be true. LOL

    With math skills like you demonstrate on PF there’s no way you ever had anything to do with engineering.
     
    Last edited: Apr 8, 2021
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  8. Patricio Da Silva

    Patricio Da Silva Well-Known Member Donor

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    See, if I said, 'there are more stars in the universe than all the grains of sand', that is a meaningful comparison, as there are OBVIOUSLY a huge number of grains of sand.

    But, EEs? Who knows about such a thing?

    In other words, what is the significance of making that particular point?
     
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  9. garyd

    garyd Well-Known Member

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    Nor am I and 99.9 percent of the rest of America, thanks Trump...
     
  10. garyd

    garyd Well-Known Member

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    Nor am I and 99.9 percent of the rest of America, thanks Trump...
     
  11. Kal'Stang

    Kal'Stang Well-Known Member

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    What's this got to do with what I said? Oh right, nothing. Again, if it wasn't for those rag tag collection of farmers, loggers, and truck drivers...Portland wouldn't have s***. Hell, they wouldn't even be able to wipe their asses with toilet paper if it weren't for them.
     
  12. rahl

    rahl Banned

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    Notice how I pointed out you could provide no evidence that the data was incorrect, and you responded by not being able to provide evidence that the data is incorrect?
     
  13. roorooroo

    roorooroo Well-Known Member Past Donor

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    And not only that, but the quoted number of "16,000,000,000,000,000,000 electrons flowing past a point every second for 1 amp of electricity to flow" isn't correct either.

    Of the various definitions of an ampere, those that refer to electrons flowing past a point in one second refer to a "coulomb," and one coulomb is equal to 6,241,509,074,460,762,607.776 elementary charges, not 16,000,000,000,000,000,000.

    For example, from

    https://www.dictionary.com/browse/ampere (scroll down to the definition which relates to the number of electrons)

    The SI unit used to measure electric current. Electric current through any given cross-section (such as a cross-section of a wire) may be measured as the amount of electrical charge moving through that cross-section in one second. One ampere is equal to a flow of one coulomb per second, or a flow of 6.28 X 10^18 electrons per second (of course, the 6.28 is an older approximation)

    Another example:

    https://en.wikipedia.org/wiki/Coulomb

    The SI system defines the coulomb in terms of the ampere and second: 1 C = 1 A × 1 s. The 2019 redefinition of the ampere and other SI base units fixed the numerical value of the elementary charge when expressed in coulombs, and therefore fixed the value of the coulomb when expressed as a multiple of the fundamental charge (the numerical values of those quantities are the multiplicative inverses of each other). The ampere is defined by taking the fixed numerical value of the elementary charge e to be 1.602176634×10−19 coulombs.

    Thus, one coulomb is the charge of 6241509074460762607.776 elementary charges, where the number is the reciprocal of 1.602176634×10−19 C.
     
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  14. Aleksander Ulyanov

    Aleksander Ulyanov Well-Known Member

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    The over half-million dead don't share that opinion. Look, It's somewhat silly to stand in front of an oncoming fast freight train and watch it until it narrowly misses you every day but especially so to then insult as cowards everyone who doesn't share your unusual custom. Conservatives are ****ing crazy IMO and while that is generally their full right. I really resent their trying to kill me with their strange delusions
     
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  15. garyd

    garyd Well-Known Member

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    No one is trying to kill you. Paranoia is not a good look. Nothing you do guarantees you won't get it. Nothing I do guarantees you won't get it.
     
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  16. Fangbeer

    Fangbeer Well-Known Member Past Donor

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    Think of a simple circuit with an ideal 1v cell with 1 ohm of internal resistance as a dc voltage source. Connect it to an ideal capacitor. During the first instant of the first time constant 1 amp of current will flow through the capacitor. Electrons will be leaving the anode. Electrons will be entering the cathode. Current will flow through the capacitor. No electrons will pass from cathode to anode of the capacitor. During the first instant of the second time constant, the current will be something like 330mA. Still no electrons moved from cathode to anode of the ideal capacitor. After 5 time constants no more current will flow.

    Now with the capacitor charged to the dc supply voltage, if you attach an AC signal to the anode of the capacitor. Current will again flow through the capacitor to the cathode, but no electrons travel from one side to the other.

    If this wasn't true, we'd have a heck of a time coupling amplifier circuits, smoothing pulsating DC, and filtering frequencies.
     
    Last edited: Apr 8, 2021
  17. ImNotOliver

    ImNotOliver Well-Known Member

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    No current flows through the dielectric either.
     
  18. roorooroo

    roorooroo Well-Known Member Past Donor

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    Agreed, but my point was that a certain poster who fancies himself as "highly intelligent" thought that a coulomb was 16,000,000,000,000,000,000 electrons, when in fact, it is the charge of 6,241,509,074,460,762,607.776 electrons.
     
  19. ImNotOliver

    ImNotOliver Well-Known Member

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    Were you aware that one electrical charge is the amount of electrical charge of one electron. In conventional current flow, it is the gaps, or the holes in between that flows, as each electron moves one step forward, the hole steps backwards one step. Thus with each electron taking only one step forward, a hole can pass the entire length.
     
    Last edited: Apr 8, 2021
  20. ImNotOliver

    ImNotOliver Well-Known Member

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    Large amounts of money flows through the Portland metro area on a daily basis. There are a lot of really nice houses. It has nothing to do with the rural counties.
     
  21. ImNotOliver

    ImNotOliver Well-Known Member

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    The most simple use of a capacitor is as a filter on a power supply to reduce ripple. When there is a current spike, the excess is dropped into the capacitor, which is drawn in because the other end of the capacitor is tied to ground. When the current dips low, some of the excess current, or charge, or electrons are drawn out of the capacitor and back into the line. No current flows through the capacitor. What is put in one end is taken out that same end. It is kind of the beauty of capacitors, the current flow on each side is mostly independent.
     
  22. ImNotOliver

    ImNotOliver Well-Known Member

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    Whatever silliness you want to believe. I was just stating that most of American fruits and vegetables are grown in California. I like to eat bananas. I know of no place in America that grows bananas. They seem to come from Central America. I am okay with that.
     
  23. garyd

    garyd Well-Known Member

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    My dad grew a banana tree in his back yard. It is a pain in the butt, but it can be done.
     
  24. 557

    557 Well-Known Member

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    Some of us just care about being factual. Some don’t. Keeps the place interesting. :)
     
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  25. Fangbeer

    Fangbeer Well-Known Member Past Donor

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    Nope. Capacitors resist changes in voltage. Inductors resist changes in current. If you have "a current spike" you drop it into an inductor's M field. If you have a voltage spike you drop it into a capacitor's E field. If the current increases but the voltage does not, there will be no change in the capacitor's charge. What you're suggesting is a cap in parallel with a load. If you put a cap in parallel with a load and the load shorts, current will spike and the cap will do it's best to keep that current high.

    Capacitors do smooth out ripple, but ripple is delta V, not delta I.

    In power supplies, the capacitors are there to smooth out the output of a bridge rectifier which oscillates from peak to 0 @ twice the AC input freq.
    Caps are also used to phase shift AC voltage to start and run inductive motors.
    Caps are used in bandpass and band reject.
    Caps are used for coupling.
    Caps are used in voltage multipliers.
    Caps are used for PF correction.

    Got a nifty little use for caps on my 3 phase drill press running off my single phase 220 home supply.
     
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