Consider the following statements:1. Two persons on the surface of moo...
Sound waves require material medium to travel. On the surface of the moon, there is no atmosphere. The speed of sound is maximum in solids and minimum in gas medium.
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Consider the following statements:1. Two persons on the surface of moo...
Understanding the Statements
The question presents three statements regarding sound and its propagation. Let's analyze each statement to determine their validity.
Statement 1: Two persons on the surface of the moon cannot talk to each other.
- This statement is correct.
- The moon has no atmosphere, meaning it is effectively a vacuum.
- Sound requires a medium (like air, water, or solids) to travel; without it, sound waves cannot propagate. Therefore, two astronauts would not be able to communicate verbally without the aid of radio equipment.
Statement 2: Sound waves cannot travel through vacuum.
- This statement is also correct.
- Sound is a mechanical wave that travels through the vibration of particles.
- In a vacuum, there are no particles to vibrate, which means sound cannot be transmitted. This is why there is silence in the vacuum of space.
Statement 3: Speed of sound is greater in solid medium than in liquid or gas medium.
- This statement is correct as well.
- The speed of sound varies in different media due to the density and elasticity of the material.
- In general, sound travels fastest in solids (due to closely packed particles facilitating quicker vibrations), followed by liquids, and slowest in gases.
Conclusion
Given that all three statements are correct, the correct answer is indeed option D: 1, 2, and 3 are correct. Each statement accurately reflects the principles of sound propagation and the properties of various media.