In a smoke detector americium (A = 95) transmutes to neptunium (A = 93) by
A) beta emission.
B) alpha emission.
C) gamma emission.
D) none of the above
Answer: B
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a. microwave b. gamma c. visible light d. ultraviolet e. infrared
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An iron nail is brought near a magnet. Which of these is not true?
a. The nail has a north pole and a south pole. b. The nail becomes a north pole or a south pole. c. The magnet exerts an attractive force on the nail. d. The nail exerts an attractive force on the magnet. e. The nail is ferromagnetic.