Yesterday's Answer:
The radioactive substance in smoke detectors is called Americum-241. It emits alpha particles and low-energy gamma rays.
Today's Question:
Perhaps the most important prayer in Judaism, observant Jews aspire to have it be the words they utter with their last breath. What is this prayer called?
I don't know this one.
(Sources: American Mensa, email transmission, October 27, 2011: http://www.howstuffworks.com/home-improvement/household-safety/fire/smoke.htm; http://education.jlab.org/itselemental/ele095.html; http://www.youtube.com/watch?v=6J_KqY81EmA)
Compiled by Otto Ladensack and Patricia Ladensack
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