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Problem 6: Radar gun A police car is at rest parallel to the highway and measures...
Problem 6: Radar gun A police car is at rest parallel to the highway and measures the speed of cars. It sends the signual with a frequency of 1200 Hz, bounces off the moving car (it is traveling toward or away from tho signal emitted) and the radar gun measures the frequency of the signal received. For one car suspected of specding the reccived frequeney was 1100 Hz. The speed of sound is approximatcly 350m/s (note our radar gun ses...
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...
The radar gun of a police car emits an electromagnetic wave with a frequency of 7.5x10°Hz. The wave from the gun reflects from a speeding car and returns to the police car, where on board equipment measures its frequency to be greater than the emitted wave by 6.4 kHz. What is (1, 1,
A police car uses a radar gun to measure the velocity of a car and find out if it is speeding. The most common radar gun mounted inside the squad car window or dashboard and lies in the X band frequencies of microwaves of 10.50-10.55 GHz. A handheld version of this radar gun utilizes the K band frequencies between 24.05-24.25 GHz. A handheld radar (source of waves) with a frequency of 24.13 GHz is directed to car moving at 61...
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...
Police use radar guns and the Doppler effect to catch speeders. A radar gun emits an electromagnetic wave that reflects from the oncoming car. The reflected wave returns to the police car with a frequency (measured by on-board equipment) that is different from the emitted frequency. If one such radar gun emits a wave whose frequency is 10.5 GHz. A frequency of 2.46 GHz is picked up by the radar gun when a hot shot in a sports car goes...
A police radar gun operates at an emitted frequency of 10 GHz (10 x 109 Hz). The police officer aims his radar toward a speeding car moving directly away from him at v = 0.2c. The signal reflects off the car and travels back to the police officer where he detects it. What frequency does he detect? Instead the police officer aims the radar at an airplane flying directly overhead at an altitude of 10,000 m with v=0.2c in a...
A police officer's radar gun emits radio waves at a frequency of 11.1 GHz. What is the difference in the frequencies reflected back to the radar gun by a car traveling at the 35 mph speed limit and a car traveling 9 mph faster? Assume that the cars are both headed directly away from the stationary officer. A police officer's radar gun emits radio waves at a frequency of 11.1 GHz. What is the difference in the frequencies reflected back...
A speeder is pulling directly away and increasing his distance from a police car that is moving at 24.0 m/s with respect to the ground. The radar gun in the police car emits an electromagnetic wave with a frequency of 6.95×109 Hz. The wave reflects from the speeder's car and returns to the police car, where its frequency is measured to be 316 Hz less than the emitted frequency. Calculate the speeder's speed with respect to the ground.
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