
A car is approaching a radar speed trap at 80 mi/h. If the radar set works...
A traffic cop sends a radar signal of 2.0 ×10^9 Hz towards a car approaching with a speed of 120 km/s. Find the difference between the frequency of the light emitted by the radar, and the frequency reaching the speeding car. - 180 Hz - 222 Hz - 330 Hz - 460 Hz
You are driving on a straight and endless Route 77 highway with your car. Ahead of you, at the horizon, a policeman stands and points his radar to you and measures your speed. The radar he is using is working on Doppler shift principle at 1800MHz. It detects a frequency shift of 800 Hz in the reflected signal from your car compared to the transmitted signal. What is the speed of your car measured by the radar? Express you answer...
A state highway patrol car radar unit uses a frequency of 9.50×109 Hz . What frequency difference will the unit detect from a car approaching a parked patrol car with a speed of 40.0 m/s ?
A TV station has a weather radar which is monitoring an
approaching thunderstorm. The radar emits radio waves at a
frequency of 2900 MHz . The thunderstorm line is approaching the
radar installation at 45.0 km/h
Radio waves are reflected from the water drops in the
thunderstorms, and the reflected waves are detected back at the
installation. As measured by the receiver at the installation, is
the frequency of these reflected waves greater or less than 2900
MHz ?
By...
A state highway patrol car radar unit uses a frequency of 9.50×109 Hz What frequency difference will the unit detect from a car approaching a parked patrol car with a speed of 39.0 m/s ?
You are travelling at city speed in your car (35 mi/h). Approaching a stop sign, you slwo down at a uniform rate and come to a stop in 3.9 seconds. From the time you step on the brakes, to when you come to a complete stop, what distance does the car travel? show all work
A traffic official, hiding in the bushes, is using a radar speed gun to check the speeds of motor vehicles driving on the highway. The radar gun signals a frequency of 9 MHz. In the case where the motor vehicle is approaching the traffic official at 96 km/h determine the following: A. The frequency of the signal as detected by the motor vehicle. Units: MHz B. The frequency detected by the radar speed gun for the signal reflected back to...
Problem 4: Radar gun Police car is at rest parallel to the highway and measures the speed of cars. It sends the signal of the frequency 1500 Hz which bounces off the moving car and the radar gun measures the frequency of the signal received. For one car suspected of a speed limit violation the received frequency by the radar gun was 1250 Hz. The speed of the sound in the air is approximately 350 m/s a) How fast was...
A car has a top speed of 80 m/s (about 179 mi/h) and has wheels of radius 29 cm. If the car starts from rest and reaches its operating speed after 9.6 s, what is the angular acceleration of the wheels? Assume the car accelerates uniformly.
The police use radar guns and the Doppler effect to catch violators. A police car is driving from right to left at 50 km / h, another man's car is driven at a speed of 150 km / h away from the police car in the same direction. A police radar gun emits an electromagnetic wave whose frequency is 5.0 × 107 Hz that is reflected from the oncoming car. What is the difference between the frequency of the wave...