Question

which statement about the effect of temperature on the speed of sound is correct? (1 point)
changes in temperature have no effect on the speed of sound.
as temperature increases, the speed of sound increases because molecules in the medium collide more frequently.
as temperature increases, the speed of sound increases because the medium becomes denser.
as temperature increases, the speed of sound decreases because molecules in the medium collide less frequently.

Explanation:

To determine the correct statement, we analyze the relationship between temperature and the speed of sound:

1. The first option is incorrect because temperature does affect the speed of sound.
2. The second option is correct. Sound travels via molecular collisions. As temperature increases, molecules gain kinetic energy, move faster, and collide more frequently, which increases the speed of sound.
3. The third option is incorrect. Generally, an increase in temperature (for gases, e.g., air) leads to a decrease in density (since molecules spread out), not an increase.
4. The fourth option is incorrect. Higher temperature increases molecular motion and collision frequency, so the speed of sound should increase, not decrease.

Answer:

B. As temperature increases, the speed of sound increases because molecules in the medium collide more frequently.