27. In a sound wave the particles that moved closer together is
A. Frequency C. Compression
B. Period
D. Rarefaction
28. Which of the following best describes a high frequency
sound? It has
A. low pitch
C. high pitch
B. low energy
D. All of the above.
29. Which of the following would most likely transmit sound
best?
A. Steel in cabinet C. Air in your classroom
B. Water in the ocean D. Water in a swimming pool
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Answer:
27. C
28. C
29. A
Explanation:
27. Where the molecules are pushed closer together is an area of compression and when they spring back.
28. A high pitch sound corresponds to a high frequency sound wave.
29. The speed of sound is faster in solid materials and slower in liquids and slowest in gases.