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    B Dice roll probability

    OK Let me see if I got this... The probability of NOT rolling a 3 is 5/6 or 83.3% (even I can calculate the chances it WILL happen from here, lol). Then, if I add another dice, I would take (5/6)^2 or 69.2%, three dice (5/6)^3 or 57.8% etc...And, that's all there is to it? So, each time you...
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    B Dice roll probability

    Yes, I'd like to learn more. Like how to approach these problems...
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    B Dice roll probability

    Yeah, just messing around. a similar question came up at work, and I realized I didn't know how to calculate this...
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    B Dice roll probability

    So, I made a 6x6 grid. I counted the number 3s in the column and row. I counted 12 out of 36 possibilities. Which leads me right back to 12/36 or 1/3??? Yeah, I learning this on my own, not for a class or anything. A probability question came up at work and I realized I didn't know how to...
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    B Dice roll probability

    Hello, I am trying to learn the basic concepts of calculating probability as it pertains to dice rolling. I have searched the internet and not been able to figure it out. If I have a regular 6 sided dice and I want to know the probability of rolling a 3, I know its 1/6 or 16.6%. This is...
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    Automotive Automobile HP and Gas mileage question

    Thanks for the reply Ranger Mike. At the 500HP would both cars consume the same amount of gas if both cars were sitting still and the engine efficiency was the same on both engines? It seems like they would. I mean if one engine is at 12000 rpms (even though it uses less gas it is going...
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    Automotive Automobile HP and Gas mileage question

    I hadn't thought of that. I was focused on the engine itself, not the vehicle. But it is a good question. Lets say the vehicles are not moving and putting out 500 HP. So, let me give you a little history on why I'm asking. I watched a youtube video on a guy who took a honda civic and...
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    Automotive Automobile HP and Gas mileage question

    Hi all, I have a few questions concerning cars and HP, I will post the first question now and I think the answer will determine if I need further help. I will prefeace my question with the disclaimer that I have very limited automotive knowledge. If 2 cars that are operating at the same...
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    VRLA batteries - charging

    This a pretty good white-paper on batteries. It says VRLA batteries generally do better at the recommended float voltage, and dont require "equalization" like a flooded lead acid. But I would look at the manufacturer's documentation to be sure...
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    T1 circuit or device help

    I work in the electronics industry on radio communications specifically. The radios I maintain are not usually located at the facility in which they are used. Meaning the tramsmitters and receivers are located several miles from their respective operators, and the audio signals as well as the...
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    Radio Frequency Interference (RFI)

    Excellent! Thank you very much for the replies.
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    Radio Frequency Interference (RFI)

    Thank you for the replies! Let me see if I understand. By "random string of high current impulses" you are referring to the number of electrons "jumping" the gap between the electrode and return path. The reason it is random is because the arc is constantly changing due to the environment in...
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    Radio Frequency Interference (RFI)

    I am an electronics technician, and I work on various types of electronic equipment including radio communications devices which is the reason for asking this question. I was recently troubleshooting a radio communications malfunction, basically when squelch was broken, there was a “noise”...
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    Ground and common clearing it up!

    I'm not sure I follow you Jim, If you have a 10:1 step-down txfmr being fed 2400vac on the primary, the secondary would be outputting 240vac to the house. Now, if the primary shorted to the secondary, lets say half way (we now have a 5:1 txfmr), the surge of the extra 240vac will not enter...
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    Working of antenna

    This was a recent topic, and some very good explanations, look at the links I posted in this thread, it explains half-wave dipoles really well. https://www.physicsforums.com/showthread.php?t=527429&highlight=gtacs
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    Power supply and Multimeter questions

    What a great way to explain this! After I read this question I was working with a DC power supply (working just as the OP'er stated) and had no idea how to explain why it worked that way. Nice Job!
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    How to power 375 watt 12vdc motor ?

    This one would run it. Under the details tab it says the 12v lines will run 53A (and is the cheapest I seen) for <$100. Be careful on what you buy, just because the wattage is over what you need doesn't mean the 12v line will run at that power rating. Good luck...
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    Help needed with static electricity!

    Very informative links Bud, and thanks for the rewrite westom. I am curious, what happens to the surge once it enters an AC to DC powersupply? Is the powersupply normally the failed component?
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    Radio frequency antennaa

    Here are some good links to how an antenna radiates. If you need specific information, there are alot of people here that know alot about antennas and RF radiation. http://www.hottconsultants.com/pdf_files/dipoles-1.pdf http://w4trc.org/dipoles/dipoles-2.pdf [Broken]
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    Help needed with static electricity!

    Westom, could you expound on this please, I like, Jim, thought you were refering to standing waves on the wire, and could not relate that to the problem. I looked for info. on long-wire antennas and could not find anything of value. As far as the whole house protectors you mentioned, I did...
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    Ground fault power line

    Why would we care about any potential to earth if the electricity is not trying to go there? I definitely see the benefit of grounding/bonding in the home, as digoff demonstrated. In the case of insulation breaking down inside a conduit, having the green/bare wire bonded to the metal...
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    Ground fault power line

    I think the grounded grid is invaluable for its static electricity dissapation and would not change a thing. But, lets say, there was no such thing as static electricity seeking a path to ground. I dont see how an ungrounded system would be un safe. The unintentional ground fault caused by...
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    Help needed with static electricity!

    In the OP he said they added a ground (im assuming and earth connection). On a typical, professional, installation the barn would be fed from the main DP to a sub-DP via a 100A (mine) breaker. The sub-DP would then be earthed. Something im interested in exploring is, you said the "earthing...
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    Help needed with static electricity!

    Isnt the return on the primary side hard wired to the neutral of the secondary, and then directly to ground at the pole? (At a typical house transformer)
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    Ground fault power line

    Here is a link to a good conversation about grounding/earthing. It seems to me the only reason the "earth" anything would be to dissipate static electricity (Jim has a real life story in my link). Grounding/bonding internally, like dlgoff stated in post #5, makes perfect sense...
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    Electrical earth

    This has been discussed at length here. JimHardy and EvilBunny have some really good explanations at the link below: https://www.physicsforums.com/showthread.php?t=526008&highlight=grounding&page=2
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    Help needed with static electricity!

    Sounds like you got it!! Good Luck!
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    Help needed with static electricity!

    I think the lightning rods are a good idea, but I dont think it will solve your problem. I would guess your wiring is fine if you had it done professionally, you dont have any other issues, and you have had it inspected. Is your opener plugged into a standard outlet mounted on the ceiling...
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    How antenna radiates?

    gotcha! tyvm
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    How antenna radiates?

    I didnt see where the wavelength was given. vk6kro, figured out, by looking at the circuit diagram in the first post, what frequency the circuit would operate at. I was just curious how he got that answer from looking at the diagram.
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