Question

question 6 (multiple choice worth 2 points)
(03.03 mc)

hydrophones help scientists listen to and record sounds from the ocean. which statement best describes how ocean water affects sound waves?

warm water increases the speed of sound.
cold water increases the speed of sound.
high water pressure decreases the speed of sound.
low water pressure increases the speed of sound.

Explanation:

Analyze factors affecting sound speed in water

Using the Sound Wave Speed and Medium Density Effects knowledge points

• Sound speed in water depends on temperature, salinity, and pressure.
• Higher temperature increases the kinetic energy of water molecules, which increases the speed of sound.
• Higher pressure (depth) increases the density and elasticity of water, which also increases the speed of sound.

Evaluate the given options

• Warm water increases the speed of sound: Correct. Higher temperature increases sound speed.
• Cold water increases the speed of sound: Incorrect. Cold water decreases sound speed.
• High water pressure decreases the speed of sound: Incorrect. High pressure increases sound speed.
• Low water pressure increases the speed of sound: Incorrect. Low pressure decreases sound speed.

Answer:

• (A) Warm water increases the speed of sound. (Correct answer)
• (B) Cold water increases the speed of sound.
• (C) High water pressure decreases the speed of sound.
• (D) Low water pressure increases the speed of sound.