Question

the speed of sound through diamond is about 12,000 m/s. the speed of sound through wood is about 3,300 m/s. which statement explains why the speed of sound is different through these materials? (1 point) they have different phases of matter. they have different temperatures. they have different salinities. they have different rigidities.

Explanation:

To determine why the speed of sound differs in diamond and wood, we analyze each option:

• "They have different phases of matter": Both diamond (solid) and wood (solid) are in the solid phase, so this is incorrect.
• "They have different temperatures": The question doesn't mention temperature differences affecting the speed here; the focus is on the materials themselves, so this is incorrect.
• "They have different salinities": Salinity is related to the amount of salt in a substance (usually liquids like water), and neither diamond nor wood are typically described by salinity, so this is incorrect.
• "They have different rigidities": The speed of sound in solids is related to the material's rigidity (stiffness). Diamond is much more rigid than wood, which affects how fast sound waves travel through them. This explains the speed difference.

Answer:

D. They have different rigidities.