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21. Which of the following statements below is TRUE about the relationship between temperature and the speed of sound? I. In warmer temperature, particles move quicker allowing the sound to travel faster II. There is a wider space between particles in colder temperature allowing the sound to travel faster. III. In colder temperatures, particles move slower making the sound travel slower. A B. I & II II & III C. I & III D. I, II, & III​

Sagot :

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Answer:

C. I&III

Step-by-step explanation:

I. In warmer temperature, particles move quicker allowing the sound to travel faster.TRUE

II.There is a wider space between particles in colder temperature allowing the sound to travel faster.FALSE. SOUND DOESN'T TRAVEL FAST IN COLDER TEMPERATURE. IF THE TEMPERATURE IS DECREASED, PARTICLES MOVE SLOWER, BECAUSE OF LESS ENERGY.

III.In colder temperatures, particles move slower making the sound travel slower. TRUE.

so the answer is I and III.