# Recent content by gtacs

1. ### 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...
2. ### B Dice roll probability

Yes, I'd like to learn more. Like how to approach these problems...
3. ### 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...
4. ### 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...
5. ### 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...
6. ### 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...
7. ### 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...
8. ### 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...
9. ### 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...
10. ### 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...
11. ### Radio Frequency Interference (RFI)

Excellent! Thank you very much for the replies.
12. ### 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...
13. ### 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”...
14. ### 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...
15. ### 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