Question

When a region of a sound wave is in the state of compression ___.

• A. it has high pressure, low density
• B. it has low pressure, high density
• C. it has high pressure, high density
• D. it has low pressure, low density

Answer 1

The correct option is C it has high pressure, high density

Sound is created by vibration of particles. When a particle is vibrating, it tries to push the medium next to it, making it a region of high pressure and density. This portion of the medium is said to be in compression.