![subject](/tpl/images/cats/biologiya.png)
In which one of the following locations can a person hear the echo of a sound? a. at least 33.2 meters behind the reflecting surface
b. at least 16.6 meters in front of the reflecting surface
c. less than 33.2 meters behind the reflecting surface
d. less than 16.6 meters in front of the reflecting surface
![ansver](/tpl/images/cats/User.png)
Answers: 2
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Another question on Biology
![question](/tpl/images/cats/biologiya.png)
Biology, 22.06.2019 08:30
Which best describes a benefit of using dna technology in medicine? a) medicine can be produced in mass quantities. b) medicine can be distributed at a reduced cost. c) medicines have fewer side effects. d) medicines are resistant to antibiotics.
Answers: 3
![question](/tpl/images/cats/biologiya.png)
Biology, 22.06.2019 09:30
Which statement is a physical property? becomes moldy quicklyeasy to digestconducts electricity poorlydoes not burn
Answers: 1
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/biologiya.png)
You know the right answer?
In which one of the following locations can a person hear the echo of a sound? a. at least 33.2 mete...
Questions
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 18.09.2019 12:30
![question](/tpl/images/cats/mat.png)
Mathematics, 18.09.2019 12:30
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/himiya.png)
Chemistry, 18.09.2019 12:30
![question](/tpl/images/cats/obshestvoznanie.png)
Social Studies, 18.09.2019 12:30
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/health.png)
Health, 18.09.2019 12:30
![question](/tpl/images/cats/mat.png)
Mathematics, 18.09.2019 12:30
![question](/tpl/images/cats/en.png)
English, 18.09.2019 12:30
![question](/tpl/images/cats/fizika.png)
![question](/tpl/images/cats/istoriya.png)
History, 18.09.2019 12:30
![question](/tpl/images/cats/en.png)
English, 18.09.2019 12:30
![question](/tpl/images/cats/mat.png)
Mathematics, 18.09.2019 12:30
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 18.09.2019 12:30
![question](/tpl/images/cats/mat.png)