From: muratlanne@gmail.com   
      
   "Jim Wilkins"  wrote in message   
   news:jdd0bm$smf$1@dont-email.me...   
   >   
   >  wrote in message   
   > news:94e4c697-f479-4648-b91f-346af6c13e31@b14g2000prn.googlegroups.com...   
   >> FLASHFLIGHT   
   >> Questions to think about?   
   >   
   >> Why are some flashlights brighter than others?   
   > Why are some people?   
   >   
   >> Why is it important that all of the batteries point in the same   
   >> direction?   
   If one is reversed the others will force current through it backwards,   
   overcharging it until it pops open and leaks corrosive electrolyte fluid.   
   [Snip possibly gurlz-inappropriate speculation on why sled dogs in line all   
   want to point in the same direction]   
   >   
   >> What is the difference between old batteries and new?   
   Old ones have less remaining capacity. If mixed with new ones they can be   
   drained empty and then charged backwards, again causing messy leakage   
   >   
   >> What makes a flashlight suddenly become dim or bright when you shake it?   
   One of the wires from the glass bulb is soldered to the base's center   
   contact. The solder oxidizes slowly and becomes a bad connection but it's   
   soft enough that shaking the flashlight may let the battery wipe the solder   
   clean.   
      
   jsw   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)