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How is radar used to determine the speed of moving objects?
The "radar gun" is not the same as position-finding radar. Using microwaves (or a pulsed laser), it determines the speed of an object by measuring the change in the frequency of the waves when they are reflected back toward the gun.In this application it is useful to think of light as a series of waves. Radar then is radio frequency waves sent out from the radar gun to the vehicle under consideration. These waves travel at a set speed that is constant, nothing can change how fast they go, but the distance the waves are from each other can be varied. This spacing of the radio waves is referred to as the frequency.The closer the waves are to each other, then more of them can travel past a certain point in a given second. The farther apart the waves are, the number passing a certain point in any given second will be lower. Frequency then is a measurement of number of waves per second passing a certain point. Usually we don't consider unit-less values in such measurements so frequency is just considered to be (/second), (per second), or Hertz.When a radio wave strikes a car it is reflected back the way it came, back to the radar gun where there is a coil that can detect them. If the radar gun were fired at a stationary wall the frequency of the waves coming back would be exactly the same as the frequency of the waves going out, and the instrumentation of the gun would interpret this as a stationary object.If the wall was moving towards the gun however, then, in the time between the successive radio waves striking the wall, the wall moved a little bit closer to the gun. This makes the second radio wave get reflected sooner and the second wave travels back to the gun closer to the first wave then when the two of them left the gun. This is an increase in frequency. The radio waves are still traveling at the same speed (the speed is always constant, can't vary) but they are closer to each other, more concentrated.The instrumentation in the radar gun detects this change in frequency and uses it to calculate the speed of the approaching wall. It works the same way to determine the speed of a car.
Does Speed Racer have an m on his shirt?
yes because his car have an m!
How does adaptive laser guided cruise control work?
How it works is not nearly as important as what it does. The "how" involves distance sensors similar to radar guns, computers, and algorithms. The "what" that the driver needs to know is that it will slow the car down automatically if the car see's a vehicle in front of it getting too close, and match that cars speed. Typically the car will then speed back up to the speed set by the driver when it no longer sees that obstacle a.k.a. that car exited, sped up, or you changed lanes. How it works is not nearly as important as what it does. The "how" involves distance sensors similar to radar guns, computers, and algorithms. The "what" that the driver needs to know is that it will slow the car down automatically if the car see's a vehicle in front of it getting too close, and match that cars speed. Typically the car will then speed back up to the speed set by the driver when it no longer sees that obstacle a.k.a. that car exited, sped up, or you changed lanes.
What did Peter ask Meg to do so she could get a new car on Family Guy?
Tell everyone she crashed into the Quahog TV antenna knocking out cable for the whole town instead of him.
What happpens to a car moving at a constant speed as it turns a corner?
The car undergoes a change in velocity. It accelerates (and does so at a constant rate - if the rate of turn is constant) in the direction of the turn. The speed is constant, but the direction the car is going changes at each instant in time because it is turning. And because it is changing direction, that means its velocity is changing (because velocity is speed plus a direction vector).
What waves from Sparkys car antenna?
An American Flag.
What is a car antenna booster used for?
A car antenna booster is used to 'boost' the radio waves of the car's antenna. This is usually used to improve radio quality and reduce static that might be heard.
What does the M stand for on Speed Racers car?
it probably means "Mach"
How is magnetism used in a car?
Any solenoid in your car is an electromagnetic device, including the alternator. The car antenna also receives electromagnetic waves to get radio.
What do police use to see the speed of a car?
radar waves.
What can cause sound waves to increase their speed?
y do u car
How is radar used to determine the speed of a car?
A beam of electromagnetic waves is bounced off the car
What type of car is most popular among boy racers?
The most popular car type used by boy racers are called Glanzas
What are the tips for need for speed most wanted?
max out your car and beat the blacklist racers. if you don't have more money do races you've already done to get money.
What is the waves length of radio waves?
Radio waves have the longest wavelengths in the electromagnetic spectrum. These waves can be longer than a football field or as short as a football. Radio waves do more than just bring music to your radio. They also carry signals for your television and cellular phones.The lengh isSolution: Solving for wavelength, i have λ = v/f = (3.0x108 m/s)/(88.1x106 s-1)The size of a radio antenna is closely related to the wavelength of the waves it is intended to receive. The match need not be exact (since after all one antenna can receive more than one wavelength!), but the ordinary "whip" antenna such as a car's is 1/4 of a wavelength. An antenna optimized to receive KLON's signal (which is the only one my car radio is ever tuned to) would have a length of 3.4 m/4 = 0.85 m.
How do you get the red car in Lego racers crosstown?
hello
What are the options for car radio antenna types?
The options for car radio antennas include internal car antennas, external car antennas, power antennas, and satellite antennas. The internal antenna is the least effective and most cars come with either the external fixed antenna or the power antenna unless their is a satellite radio in the car and then it is a satellite antenna.
