I have two in alarms in my home. One is a combo smoke minoxide detector that is located in my upstairs hallway on the ceiling the 2nd is a plug in unit that is located in the same hallway, only closer to the floor just for carbon minoxide. First the ceiling unit was going off we just thought that maybe the battery was bad, so we changed it went aboutSometime afterward, the floor one started to go offso we unplugged it and checked around a little wondering about it, but we are not using any heat right now. We are using our a/c which is forced air, but other than thatno gas stove either. I plugged the one unit into a different outlet it went off a few timesI put my hand over the front of it, it stopped. I made my husband change the battery again in the ceiling unit also perform a test on it. It did the test did not go off. I moved the one back also near the floor again. About an hour later, the one on the ceiling went off againbut not the floor unit.
Try a general Hardware store or a Welding Shop. Stay Safe. Happy Studies.
It is less of a question of being able to live without material things. It would be a question of living without structured society? Without laws, who will rob or kill you for any possessions you do have? Can people still work together for any common goal? You are far more likely to die from someone else killing you than dying because you could not make a fire or anything.
Neither one of the two systems proof to be a hundred percent effective. Nor has there been any unbiased study indicating that one is better then the other. Faraday cages have been the oldest method around, but even when a lightning hits that, the induction created in the cage is still so large, that it can destroy anything inside the building, even when it is not plugged in. In my college years I have conducted a study on this topic.
You can find a huge selection of safety glasses and goggles at Safety Glasses USA's website. If you're working with liquids or caustic vapors I would recommend you wear some type of indirect vented goggle with an anti-fog lens coating, because safety glasses are not the best choice for liquid splash protection as the liquid can still get to your eyes. The Crews Verdict Goggle is an example of a goggle that is lined in a soft foam, so they're more comfortable and won't leave marks on your face. If your primary concern is impact protection then safety glasses will meet your needs.
Sears, Lowes, Home Depot, etc
