1. Explain why sounds get quieter the farther you are from the source.

As sound waves travel farther from their source, the more spread out their energy becomes. ... The same amount of energy is spread over a greater area, so the intensity and loudness of the sound is less. This explains why even loud sounds fade away as you move farther from the source

Explanation:

As sound waves travel farther from their source, the more spread out their energy becomes. ... The same amount of energy is spread over a greater area, so the intensity and loudness of the sound is less. This explains why even loud sounds fade away as you move farther from the source

radioactive decay occurs in unstable atomic nuclei – that is, ones that don't have enough binding energy to hold

the nucleus together due to an excess of either protons or neutrons.