![subject](/tpl/images/cats/fizika.png)
Physics, 05.05.2020 23:46 Redeyestudio53
Beats: A policeman in a stationary car measures the speed of approaching cars by means of an ultrasonic device that emits a sound with a frequency of 39.6 kHz. A car is approaching him at a speed of 35.0 m/s. The wave is reflected by the car and interferes with the emitted sound producing beats. What is the frequency of the beats when the speed of sound in air is 343 m/s?
![ansver](/tpl/images/cats/User.png)
Answers: 1
Another question on Physics
![question](/tpl/images/cats/fizika.png)
Physics, 21.06.2019 23:00
Will you chech and finish these for me, because i am stumped with them.
Answers: 1
![question](/tpl/images/cats/fizika.png)
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 12:30
Which governments provide garbage collection services to homes and businesses
Answers: 3
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 12:40
Find the equation for the plane through upper p 0 left parenthesis negative 4 comma negative 8 comma negative 5 right parenthesis perpendicular to the following line. xequalsnegative 4 minus t, yequalsnegative 8 plus 2 t, zequals3 t, minusinfinityless thantless thaninfinity
Answers: 2
You know the right answer?
Beats: A policeman in a stationary car measures the speed of approaching cars by means of an ultraso...
Questions
![question](/tpl/images/cats/mat.png)
Mathematics, 29.08.2019 17:40
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/geografiya.png)
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/istoriya.png)
History, 29.08.2019 17:40
![question](/tpl/images/cats/obshestvoznanie.png)
Social Studies, 29.08.2019 17:40
![question](/tpl/images/cats/mat.png)
Mathematics, 29.08.2019 17:40
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 29.08.2019 17:40
![question](/tpl/images/cats/biologiya.png)
Biology, 29.08.2019 17:40
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mkx.png)
Arts, 29.08.2019 17:40
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/en.png)
English, 29.08.2019 17:40
![question](/tpl/images/cats/mat.png)
Mathematics, 29.08.2019 17:40
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mkx.png)
Arts, 29.08.2019 17:40