GKFix MCQ Question

What is the speed of a wave with k = 500 m⁻¹ and ω = 1.5 × 10¹¹ rad/s?

• A. 1.5 × 10⁸ m/s
• B. 2 × 10⁸ m/s
• C. 3 × 10⁸ m/s
• D. 6 × 10⁸ m/s