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?

Answers: 1

Show answers

Other questions on the subject: Physics

Physics, 22.06.2019 07:00, girlysimbelieve

The seven sisters, seven stars located more than 400 light-years away in the taurus constellation can be seen here with venus and another constellation, orion. the seven stars stay grouped together but seem to move, like the planet venus. why do stars seem to move like planets in the night sky?

Answers: 3

continue

Physics, 22.06.2019 12:20, ginachuquiano450

Aball with a mass of 275 g is dropped from rest, hits the floor and rebounds upward. if the ball hits the floor with a speed of 2.40 m/s and rebounds with a speed of 1.70 m/s, determine the following. (a) magnitude of the change in the ball's momentum (let up be in the positive direction.)

Answers: 1

continue

Physics, 22.06.2019 12:30, morgan3346

Write a full page that sumerizes thermodynamics it’s from the website visionlearnig

Answers: 1

continue

Physics, 22.06.2019 15:30, tamaraquirozmorales

Can you match these to the correct definition

Answers: 3

continue

Do you know the correct answer?

Beats: A policeman in a stationary car measures the speed of approaching cars by means of an ultraso...