The speed of sound in air at 0°C is 331 m/s. If the density of air is 1.29 kg/m³, then what is the bulk modulus of air? A) 1.15 × 10⁵ N/m² B) 1.41 × 10⁵ N/m² C) 1.68 × 10⁵ N/m² D) 2.03 × 10⁵ N/m² E) 2.50 × 10⁵ N/m²

Question

Quizplus · Accepted Answer

The bulk modulus (K) can be found using the formula K = ρv², where ρ is the density of the medium and v is the speed of sound in that medium. 
Substituting the values given, 
K = 1.29 kg/m³ x (331 m/s)² 
K = 1.41 × 10¹² N/m² 
Using scientific notation, 
K = 1.41 × 10¹⁵ N/m² 
Therefore, the answer is B.

The Speed of Sound in Air at 0°C Is 331