Unit Test — Unit test

Question 4 • DL Physical Science A (switched content, 2023+)

Which statement best compares the speed of a sound wave moving through a pot of boiling water and the water vapor above the pot?

Answer

The sound wave would move faster through the water than through the water vapor.

The sound wave would move slower through the water than through the water vapor.

The sound wave would move the same speed through the water and the water vapor.

The sound wave would move through the water and water vapor at the same speed, but decrease in speed at the transition point.

Explanation

Sound travels faster through liquids than through gases because the particles in a liquid pass along vibrations more effectively. So the sound wave would move faster through the boiling water than through the water vapor above it. Choice A is correct; the speed does not stay the same across the two materials.

AI-written and checked against the verified answer.

More from this Course

Unit Test

Unit Test

Electric Charge