Physics, 12.03.2020 00:13 ezrasedore
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
Answers: 2
Another question on Physics
Physics, 21.06.2019 19:30
Asun-sized star will spend most of its lifetime as a: white dwarf red giant protostar main-sequence star
Answers: 1
Physics, 22.06.2019 08:30
The coefficient of friction is a number that represents the resistance to sliding between two in contact with one another.
Answers: 2
Physics, 22.06.2019 17:30
Which basic property determines a colored light's placement on the spectrum of visible light? a. speed b. frequency c. amplitude d. velocity
Answers: 3
Physics, 23.06.2019 00:30
If you let go of the notebook after lifting it, will it move? how?
Answers: 1
You know the right answer?
A policeman in a stationary car measures the speed of approaching cars by means of an ultrasonic dev...
Questions
Mathematics, 28.04.2021 21:50
English, 28.04.2021 21:50
Mathematics, 28.04.2021 21:50
Mathematics, 28.04.2021 21:50
Social Studies, 28.04.2021 21:50
Mathematics, 28.04.2021 21:50
Mathematics, 28.04.2021 21:50
Mathematics, 28.04.2021 21:50
Biology, 28.04.2021 21:50
Engineering, 28.04.2021 21:50
Chemistry, 28.04.2021 21:50
Physics, 28.04.2021 21:50
