6. The difference between the speed of sound in air at 0 degrees Celsius and the speed of sound in air at 20 degrees Celsius is that
A. Cooler air molecules move more slowly and respond less readily to the energy of a sound wave
B. Cooler air molecules move more quickly and respond less readily to the energy of a sound wave
C. Coolermolecules do not move and respond less readily to the energy of a sound wave
D. Cooler air molecules move morerandomly respond less readily to the energy of a sound wave
the speed of molecules in a gas , on the average, is a measure of temperature. Temp goes up, then avg speed has increased, and vice versa.
so it would be B? Bc the molecules are movingmore quickly? But it also says in answer choice B, "respond less readily to the energy of a sound wave" so it would be moving quicker but it would be slower? Im confused.
To determine the difference between the speed of sound in air at 0 degrees Celsius and the speed of sound in air at 20 degrees Celsius, we need to understand how temperature affects the speed of sound in air.
The speed of sound in air is influenced by the temperature of the air. Generally, sound travels faster in warmer air and slower in cooler air. This is because the speed of sound is directly proportional to the square root of temperature.
In this case, we compare the speed of sound at 0 degrees Celsius with the speed of sound at 20 degrees Celsius. Since 20 degrees Celsius is warmer than 0 degrees Celsius, we can conclude that the speed of sound in air at 20 degrees Celsius is faster than at 0 degrees Celsius.
Now, looking at the answer choices:
A. Cooler air molecules move more slowly and respond less readily to the energy of a sound wave: This is the correct answer. Cooler air molecules move more slowly and respond less readily to the energy of a sound wave, resulting in a slower speed of sound compared to warmer air.
B. Cooler air molecules move more quickly and respond less readily to the energy of a sound wave: This is incorrect. Cooler air molecules move slower, not faster.
C. Cooler molecules do not move and respond less readily to the energy of a sound wave: This is incorrect. Molecules always move; it is their motion that allows sound to propagate.
D. Cooler air molecules move more randomly respond less readily to the energy of a sound wave: This is incorrect. Cooler air molecules do not move more randomly, and their random motion does not impact the speed of sound significantly.
Therefore, the correct answer is A. Cooler air molecules move more slowly and respond less readily to the energy of a sound wave.