Answer :
Final answer:
The hammer drill has the highest decibel level, typically around 100 dB, compared to other machines like the bulldozer, hand drill, and lawn mower. Each of these machines has specific decibel levels that can vary slightly based on their usage. Thus, in terms of loudness, the hammer drill stands out among the options given.
Explanation:
Understanding Sound Levels
The question asks which of the listed machines produces the highest decibel level when heard from equal distances. Decibel (dB) levels measure the intensity of sound, with higher levels indicating louder sounds. The sounds produced by each machine can be compared based on typical decibel levels associated with them.
Typical Decibel Levels
- Hammer drill: Approximately 100 dB
- Bulldozer: Ranges from 85 to 100 dB
- Hand drill: Approximately 90 dB
- Lawn mower: About 90 to 95 dB
From this list, the hammer drill usually produces the highest sound level at around 100 dB, especially when actively drilling into concrete or tough materials.
Learn more about Sound Levels here:
https://brainly.com/question/51234050
