What is the angular speed of the Earth’s daily rotation in rad s⁻¹?
Correct answer C. 7.3 × 10⁻⁵ rad/s
Explanation
The Earth turns through 2π radians in about 86,400 s (more precisely 86,164 s), so ω = 2π ÷ 86,164 ≈ 7.3 × 10⁻⁵ rad s⁻¹.
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