yoshhash2

Apologies if this is not in the right category. I can't find advice to this anywhere. I am installing solar panels on my roof. I want to know beforehand if it will interfere with incoming satellite signals, or with outgoing antennae signals (we rent out space to a radio station broadcast antennae). Even if you don't know the answer, some generalities would help. I have been told that since solar panels do not transmit a signal, it is completely irrelevant- true or not true?

Thank you. However, people (and the internet) are telling me that I was probably mistaken, that this battery in question is probably NiCad, not lithium. Stated another way, I don't understand the difference between a 12 volt lead car battery and a rechargeable household 12 volt battery, NiCad or otherwise, want to know if they are interchangeable at low rates. (I do however, understand that nonrechargeables are not meant to be recharged.) Still the same answer then?

I agree that spouting generalities don't help the argument. This can be answered simply by reversing the roles: there are also some guys who are turned on by girls who are trouble from the word go. This does not mean we all are. True story: I am one of these nice guys who felt the titular generality was true. I was once on a date with a girl that you could describe as "bad"- flirty, shallow, demanding, etc. Well, it happened that I had grown tired of not only her attitude but the many other girls like that that I had been seeing. She was flirting up a storm with a guy at a party, and I basically gave up on her, without coming out and saying it. I just got really sarcastic and sullen and just plain mean. To my utter amazement, she responded to it, though that was not my plan. She acted not only conciliatory, but almost clingy. That only made me more disgusted, and so I tried to ditch her- but of course that only got her hotter. She was the classic case you described, but I was not simple enough to presume all women were like that. Oh, yes, the rest of the story- I couldn't keep up the act. I eventually started to feel sorry for her, so I softened up- and poof, the illusion was over, she lost interest.

recharging non-automotive (lithium) batteries with an automotive trickle charger- Does anyone know if you can safely do this/ what are the risks? Specifically, I mean using a solar powered 2 Watt charger to charge up a 12 volt lithium battery for a cordless drill, but I would also like to know if in general, you can do this, for other applications, like recharging AA batteries. I have lost the charger, do not want to fork out for another one, since I hardly ever use it. Side question- if indeed this is possible and safe, is there any way to establish which is the positive terminal, which is negative if it is not labelled?

I get the general gist of it, and even studied up on the various theories within on wiki, but there are some things I don't understand: I have seen tables that show the embodied energy for standard things like bricks and sheets of plywood, etc. There seems to be a certain amount of consensus, but I seriously have to wonder if this is because they are all just copying from one source. Does anyone know of a reliable, peer reviewed source that breaks it down further, showing where they get these figures? I need to know, when they calculate, do they account for other factors such as transportation, storage, the amount of waste produced, ease of disassembly and disposal, or how to account for materials which may have been diverted from the waste stream.

thanks, both of you. john, i wonder though, if you could elaborate on why you think it is impractical. it seems that the sodium acetate could perform as a giant heat (energy) storage tank, one that does not need to be insulated like ordinary hot things, to keep it hot, as long as it is not jarred or otherwise allowed a nucleation point. anything of value (free energy from the sun), which can be stored cheaply and indefinitely, for that euphemistic rainy day, is good, no? what am i missing here?

i am a total newbie here....i understand basic principles like supercooling, phase change, etc, but otherwise a total dummy, i have equivalent to 1st yr university in chem, but that was a long, long time ago. so go easy on me. i am trying to find out the difference btwn sodium acetate trihydrate (used in handwarmers), and anhydrous sodium acetate (used as de-icer). is it the same thing? the former seems to be kind of expensive, sold by the gram, the latter seems to be cheaper, sold by the ton. specifically, i guess i want to know, does the latter share the trait to be easily supercooled? the reason i ask, is i like the potential for sodium acetate trihydrate to "store" heat, and would like to do this in large quantities, but it seems too expensive to do this on practical terms, but anhydrous s.a. seems a lot cheaper, can it do the same? i also would like to know, am i naiive here to think that you can store the heat of summer to be busted out of some huge underground storage facility in the dead of winter? (i know that you would have to separate into small quantities or otherwise you use it all in one enormous reaction.) will it remain in it's supercooled state indefinitely, as long as you don't provide a nucleation point (physically disturbing it, contaminants, etc)? on a similar note, could one do a similar opposite thing with ammonium nitrate? i am an architecture student, by the way, obsessed with the idea of saving the world thru green architecture.