PHYSICS 10 SCIENCE · 2026–27 · Textbook worked examples · p. 50

Textbook Example 13.1

Calculate the frequency of a sound wave of speed 340 m s⁻¹ and wavelength 2.0 m.

340 m s⁻¹ رفتار اور2.0 m طول موج کی آواز کا تعدد معلوم کریں۔

Solution & explanation

  1. Given v = 340 m s⁻¹ and λ = 2.0 m.

  2. Write v = fλ.

    v=f×λ

  3. Divide both sides by λ.

    f=vλ

  4. Substitute in consistent units.

    f=3402.0

  5. Divide 340 by 2.

    f=170

  6. Unit (m s⁻¹)/m = s⁻¹ = Hz.

f = 170 Hz

Independent study material · English-medium textbook p. 50 · Original book ↗