Years ago lighting struck the chimney of my neighbor's house. The chimney exploded sending bricks like rockets shells through my kitchen window and even penetrating the wall. Fortunately, I was not sitting by the window, or I would have been seriously injured. I thought about this today and wondered how many houses have lighting rods on their chimneys, and will a lightning rod prevent such destruction.
You can get even with her when she gets older
6 months at least. Mine have lasted about 1 to 2 years in a couple of cases. I try to replace them every 6 months when the daylight saving time changes. i write the date on each battery when I install them. The cost of batteries is cheap compared to a fire.
Depends. A cheapo battery might last a year, a better one longer than that. In any case, the detector should warn you by beeping that it's running down.
Option number one would be to put the stone in the mold first then pour the resin around it. I think the only other option I can think of is to find some really strong jewelry glue and try gluing the stone to the outside but you're still going to take a chance on it getting knocked off. Best option is probably to pour around it.
The presumption in safety codes is that the battery in a smoke alarm that is being tested periodically, and has no lengthy alarms, will last two years. Therefore, if you change the battery yearly, you still have a margin of safety for a battery that might be weak when installed, or that fails prematurely. Many people replace their batteries twice a year and rotate the old ones into other uses in non-critical devices, such as flashlights or transistor radios.
