![subject](/tpl/images/cats/fizika.png)
The sound of normal breathing is not very loud, with an intensity of about 11 db at a distance of 1 m away from the face of the breather.
note that in this problem sound intensity in decibels is denoted β; intensity in w/m² is denoted i.
given that a person with normal hearing canbarely detect a sound with intensity of 1 db at a frequency of 1khz (the sensitivity of the human ear peaking near 1 khz), how faraway could this person detect another person breathingnormally?
express the distance
in meters.
![ansver](/tpl/images/cats/User.png)
Answers: 2
Another question on Physics
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 02:00
Which statements about tornadoes are true? check all that apply. (a) about 12,000 tornadoes hit the united states every year. (b) a tornado looks like a funnel. (c) tornadoes are deadly atmospheric storms that cause millions in damages each year. (d) tornadoes can reach wind speeds of more than 300 miles per hour. (e) kansas is the state with the most tornadoes. (f) you will always notice a funnel before a tornado strikes.
Answers: 2
![question](/tpl/images/cats/fizika.png)
Physics, 23.06.2019 10:20
Why does a smaller car get better gas mileage than a bigger one?
Answers: 1
![question](/tpl/images/cats/fizika.png)
Physics, 24.06.2019 11:30
Has anyone completed physical science b lesson 7 unit 1 portfolio forces and motion days 1 and 2?
Answers: 1
![question](/tpl/images/cats/fizika.png)
You know the right answer?
The sound of normal breathing is not very loud, with an intensity of about 11 db at a distance of 1...
Questions
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/ekonomika.png)
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/ekonomika.png)
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/health.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 29.05.2020 15:58
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/ekonomika.png)
![question](/tpl/images/cats/health.png)
Health, 29.05.2020 15:58
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 29.05.2020 15:58
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/istoriya.png)
History, 29.05.2020 15:58
![question](/tpl/images/cats/mat.png)
Mathematics, 29.05.2020 15:58
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/ekonomika.png)
![question](/tpl/images/cats/biologiya.png)
Biology, 29.05.2020 15:58
![question](/tpl/images/cats/mat.png)