Table of Contents
Choose the correct options for the following questions.
One second is equal to the duration in which the outer-most electron of the _______ atom makes 91,92,631,770 vibrations
Difficulty: Hard
A:
Kr-86
B:
N-14
C:
U-235
D:
Cs-133
Conversion of $10^{-6}$ micro-centimeter in meters is:
Difficulty: Hard
A:
$10^{-12}$
B:
$10^{-14}$
C:
$10^{-2}$
D:
$10^{-10}$
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