Physics, 18.02.2020 00:01 nanagardiner08

A police officer uses a radar gun that emits electromagnetic waves with a frequency of 10.525 GHz (1.0525 1010 Hz). Assume the police officer is at rest, and is aiming the radar gun at vehicles traveling either directly toward, or directly away from, the radar gun. Assume the speed limit is 110 km/h, as it is on many Canadian highways. The police officer observes reflected waves that have a frequency of 2500 Hz below the frequency of the emitted waves.

a. At what speed is the car moving?

b. Choose the two correct statements about this situation.
a. The car is moving toward the police officer.
b. The car is moving away from the police officer.
c. The police officer should not cite the driver for speeding.
d. The police officer should cite the driver for speeding.

Answers: 2

Show answers

Another question on Physics

Physics, 22.06.2019 05:40

Karen is running forward at a speed of 9 m/s. she tosses her sweaty headband backward at a speed of 20 m/s. the speed of the headband, to the nearest whole number relative to a stationary observer watching karen

Answers: 1

Answer

Physics, 22.06.2019 08:30

Pl asaaap ! match the term to the correct description. a type of wave that transfers energy where the particles in the medium move perpendicular to the direction in which the energy is traveling. a type of wave that transfers energy where the particles in the medium move parallel to the direction in which the energy is traveling. movement that is back and forth, like an equal sign = a type of wave that transfers energy where the particles in the medium move in a circle motion while the energy travels left or right. movement that is like a t transfers energy from one location to another 1. wave 2. parallel movement 3. perpendicular movement 4. transverse wave 5. longitudinal wave 6. surface wave

Answers: 1

Answer

Physics, 22.06.2019 16:30

A14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.

Answers: 2

Answer

Physics, 22.06.2019 17:10

Which statement best describes the superposition principle? a.) if two in-phase waves arrive simultaneously at a point, their amplitudes add up b.) if two out-of-phase waves arrive simultaneously at a point, their amplitudes add up c.) if two in-phase waves arrive at a point one after another, their amplitudes add up d.) if two out-of-phase waves arrive at a point one after another, their amplitudes adds up

Answers: 2

Answer

You know the right answer?

A police officer uses a radar gun that emits electromagnetic waves with a frequency of 10.525 GHz (1...

Questions