Question

Which happens to sound when temperature decreases? As temperature decreases:
A. articles vibrate quickly, sound travels fast.
B. particles vibrate slowly, sound travels slow.
C. As the temperature decreases, particles vibrate slowly, sound travels fast.
D. As the temperature decreases, particles vibrate quickly, sound travels slow​

Answer 1

Answer:

B) is the correct answer.

motion of sound depends on temperature.

Molecules at higher temperatures have more energy, thus they can vibrate faster. Since the molecules vibrate faster, sound waves can travel more quickly.

since,the temperature is decreasing so molecules have less energy and can't vibrate faster.

Answer 2

As temperature decreases: (B) Particles vibrate slowly, sound travels slow.

Explanation:

• Sound is a type of energy caused by vibrations. It occurs when an object vibrates which in turn causes movement in surrounding air molecules. These air molecules bump into the molecules close to them, causing those molecules to vibrate as well and it continues until the vibrations reach our eardrums.
• When we decrease the temperature, less heat energy is supplied to the atoms, and so their average kinetic energy of the particles decreases. Due to this particles vibrate slowly.
• Sound is caused due to these vibrations only, therefore, it's speed depends on the movement of these particles. If the vibrations is slow, sound travels slowly.

Hence, As temperature decreases: (B) Particles vibrate slowly, sound travels slow.