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Everything posted by Acme
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If the original poster or other person stands barefoot on a hill in a thunder storm and holds a long pointed metal rod up high there is a fair chance of attracting lightning and said lightning has energetic properties sufficient to extinguish quite a few life forms in the immediate vicinity.
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Not so. Weightlessness and Its Effect on Astronauts
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How do you reduce voltage and make a current last longer?
Acme replied to MWresearch's topic in Engineering
Yes. But again where in actual practice would the alternator change direction do you think? Because, again, I know of no application in practice where that happens. And again, there is no application where you can't avoid it mechanically. Please answer this so I don't keep asking. -
How do you reduce voltage and make a current last longer?
Acme replied to MWresearch's topic in Engineering
Again, there is no actual situation using an alternator or generator where the direction of rotation changes. Not in wind mills, not in dams, not in autos. You are creating a problem where none actually exists. One bridge is all that is needed, regardless of the direction of rotation. Other than for sensitive electronic circuits -such as computers- it doesn't matter if the DC is pulsed. -
How do you reduce voltage and make a current last longer?
Acme replied to MWresearch's topic in Engineering
While the alternator will produce electricity in either direction, the nut holding the pulley on can be unscrewed when running the alternator 'backwards'. If for some reason it is necessary to run backwards the nut needs to be secured with some locktite®, peening, or other method. Nice pic. That back wheel is a rather more complex version of what I meant by 'vane'. Perhaps it is so built in order to have enough power to turn the large structure. What I had in mind was the old wind mills used to pump water in America back in the day. (Well, they are still used though they have been around more than a century.) Illustrations of American wind pumps here, as well as an exploded diagram of the whole mechanism including the gearbox. Aermotor Windmill Company: Windmills since 1888 -
How do you reduce voltage and make a current last longer?
Acme replied to MWresearch's topic in Engineering
Actually there are wind mill design that rotate no matter the wind direction. Here is an illustration: Wind turbines @Wiki The alternator is not going to randomly reverse direction. This is ensured by the mechanical design of the driver. -
How do you reduce voltage and make a current last longer?
Acme replied to MWresearch's topic in Engineering
Wind mills rotate in only one direction because of the pitch of the blades. Using a vane, they also orient themselves to point always into the wind. They also need gears in order to spin the alternator at a high enough speed and the friction is and always has been just part of the bargain. -
How do you reduce voltage and make a current last longer?
Acme replied to MWresearch's topic in Engineering
AC means Alternating Current and the polarity is constantly reversing. Why would you want to change the direction of the rotor? Whatever is driving the rotor you can use gears or pulleys so as to keep the rotor turning only one way. This doesn't make much sense in light of what AC is as I just noted. -
Roger that. I barely skimmed them for the record. Which all suggests to me brain pathways that have been built up over time by experience, i.e. feedback or -if you will- strange loops. I'm no fan of the banal arguments/debates of 'free will', if that is the crux of your statement here. I acts, therefore I is.
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Both seeking approval in their own special way ; troll and droll. Warms the heart, don't it?
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Physical pain v/s emotional pain
Acme replied to petrushka.googol's topic in Anatomy, Physiology and Neuroscience
The fight or flight response that may be produced by Fear has benefits to survival. -
It is not viruses or bacteria that necessitate cooking pork thoroughly, it is a parasite that encysts in the meat. This is not to say viruses and bacteria cannot contaminate pork during processing as with other meats. Taenia solium
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You would also be ending all the joy. I have reported you to the FBI as a terrorist.
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Found an article describing the process: Steam Distillation: The isolation of eugenol from cloves They use dichloromethane as a solvent. According to Wiki some paint strippers use dichloromethane, so maybe you can find it at a paint store. Dichloromethane @Wiki I think it's just a motor, but it's definitely over-kill. Given all said so far it's still not clear to me if you could use a centrifuge or not. ??
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How do you reduce voltage and make a current last longer?
Acme replied to MWresearch's topic in Engineering
Electrolysis is an entirely different animal than motors and generators. In simplest terms, a current moving in a conductor creates a magnetic field around that conductor and a conductor moving in a magnetic field creates an electric current in that conductor. This Wiki article is a fair introduction to the subject, including the historical discoveries and developments. > Electric motor -
We're looking for serious questions.
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Make one? [i would definitely have a shield, unlike this do-it-yourselfer. Duck & cover!!]
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Centrifuge?
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How do you reduce voltage and make a current last longer?
Acme replied to MWresearch's topic in Engineering
The old auto generators also used regulators to keep from overcharging the battery. Get a little DC motor, hook it to a small light, and spin it with a drill. [spin the motor, not the light. ] The light glows. Obviously if you hook a battery to the motor the motor runs. It's just the nature of the device. The magnets don't use energy; it's the coils using energy when there's a current flowing in them. -
I am ambivalent about this thread.
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How do you reduce voltage and make a current last longer?
Acme replied to MWresearch's topic in Engineering
Because a DC generator won't deliver a constant voltage/current with the differing rpms. This is why autos use alternators as I earlier related. A straight DC generator will also act as a motor, so if it isn't putting out enough juice to charge the battery it will draw juice from the battery and run. As an aside, if you get an alternator and regulator from a junkyard, take them out of the same vehicle so they will be properly matched.