Recent content by PRIDES

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    Coilgun capacitor charging circuit questions

    Yes, I'm trying to stay safe. Thanks for the warning. Thats good to know that it is the impedance of the capacitors themselves that gets reduced, so I don't necessarily need a different coil as well. Anyways, I fell really dumb about question one, as I just was doing some troubleshooting, and...
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    Coilgun capacitor charging circuit questions

    I've been making coil guns out of a disposable camera's flash circuit recently, and when experimenting with the capacitors themselves I've come across some things I can't explain, so I hope someone else can. 1. SOLVED: My mistake (In order to make my experiments easier, in place of the...
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    I need some kind of propellant gas for an experiment

    Hm, okay, thanks. I'll see what I can find!
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    I need some kind of propellant gas for an experiment

    How do I buy from Linde? I don't see how. EDIT: They have 0 locations in the US
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    I need some kind of propellant gas for an experiment

    I checked it out. It has something called isobutane mix which I'm guessing is the isobutane/propane stuff, but it doesn't look like they sell from their website and the nearest store is two states away.
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    I need some kind of propellant gas for an experiment

    For the past year or so, I've been experimenting with Isobutane. I used to get it in relatively cheap canisters of r600a from amazon.com and AliExpress, and that worked fine. Now, however, AliExpress has NO purchase options for r600a, and amazon.com will not ship it to the US, even though they...
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    Why Do Polystyrene, d-Limonene, and Isobutane Not Form a Homogeneous Mixture?

    Ok, I am really close to this. d-Limonene dissolves Polystyrene (I have tested this) and Liquid Isobutane mixes with d-Limonene (I have also tested this) However, when I mix all three together, the Polystyrene becomes completely separated from the solution. Same thing with all polymer solutions...
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    Misc. Explain this trending science DIY video

    Oh yes, the rotational direction of the current you are correct. Solenoids ARE different from electromagnets in that respect, oops, my bad. I'll also need to remind myself that a coil simply turned around is still wound the same way as well, which isn't the same as reversing the winding. I...
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    How can neon have a melting point?

    In addition, being a noble gas simply means that the atom's valence shell is filled (in this case) with 8 electrons. The neon's K shell is filled with 2 electrons and the L shell is filled with 8, its "happy". However, sodium has a filled L and K shell but its M shell (can contain 18) only has...
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    Misc. Explain this trending science DIY video

    Well, the magnetic field strength of the solenoid (B) depends on the current of the circuit (constant) the number of turns. The number of turns is the number of turns between the plus and minus, so that is pretty much constant through the whole, so I don't think that the field strength will...
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    Refrigerator Compressors Already have Refrigerant?

    I definitely could cannibalize an old refrigerator, only problem is I have none on hand (buying one might be easier than buying parts now that you mention it though). And no way I'd do this in my basement. In my garage or outside definitely. I really haven't chosen any specific refrigerant...
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    Refrigerator Compressors Already have Refrigerant?

    Of course, I definitely do NOT expect to learn this in 5 minutes (I feel like I always give that impression :( ), thanks though. I probably will find a textbook or something I can use to learn a lot more. I do know a little of thermodynamics (definitely not enough at the moment), but when you...
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    Trying to self-learn calculus but stuck on this idea

    The big thing to understand here is that implicit differentiation kind of depends on the chain rule. First, derivatives with respect to something means that if y = 3(x^2), y = 3u, and u = x^2, then derivative of y with respect to u is 3 and derivative of u with respect to x is 2x so chain rule...
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    Refrigerator Compressors Already have Refrigerant?

    I it were me, I would as well lol. But this is actually a project I might be funded for, so I'll take the chance to learn something new and to test the limits of my engineering ability.
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    Refrigerator Compressors Already have Refrigerant?

    Well, my aim is to design and build a small chest fridge. Would you happen to know much of refrigerators? Can I calculate the temperature difference using the equation q = m*c*t if the energy in the system remains the same? If the temperature of the heat exchange equalize with the surrounding...
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