Editor
The angular speed for daily rotation of Earth around its own axis is:
Difficulty: Easy
A: 
$\pi$
B: 
$7.3 \times 10^{-5} rad sec^{-1}$
C: 
$5.3 \times 10^{-5} rad sec^{-1}$
D: 
$7.3 rad sec^{-1}$
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