we have a very high ceiling with a smoke detector, at least 25 feet, how do we change the battery?
Home smoke detectors contain radioactive materials.-True they are used to ionize any smoke particles which are then attracted to charged plates and cause an electric current, which sets off the alarm. Are radioactive materials and radiation unnatural? False no, many exist naturally, such as Uranium, Radon. 3. All radiation causes cancer. - FALSE I assume this means, literally, all radiation, which includes light and heat. 4. Human senses can detect radioactivity.- FALSE no, cannot do .
A black hole is basically a dead star. Black holes originate after the star has burned out all of its hydrogen into heluim. Even light cannot escape black holes. LOL and maybe people that wrote it could've been on something. Good Luck
