Suppose you and your friend are on the Moon. Will you be able to hear any sound produced by your friend ?

Explanation

To determine whether you and your friend can hear each other on the Moon, we need to consider how sound travels.

### Step-by-Step Solution:

1. **Understanding Sound Propagation**: Sound is a mechanical wave that requires a medium (like air, water, or solids) to travel. It propagates through the medium by creating regions of compression and rarefaction.

2. **Atmospheric Conditions on Earth**: On Earth, we have a thick atmosphere composed of gases, primarily nitrogen and oxygen. This atmosphere acts as a medium for sound waves to travel through. When you speak, your vocal cords create vibrations in the air, which then travel to the ears of the listener.

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