Answer: 100 m/s.
- A 10 m/s
- B 50 m/s
- C 100 m/s
- D 1000 m/s
Correct answer: C. 100 m/s
Explanation: v = sqrt(T/mu) = sqrt(100/0.01) = sqrt(10000) = 100 m/s.
A standing wave forms from two identical waves travelling in opposite directions and interfering; nodes (always zero displacement) and antinodes (maximum displacement) stay fixed in place, unlike a travelling wave where the whole pattern moves.
Concept context
Wave types, superposition, standing waves, Doppler effect, and sound intensity.