radar -note this word is a palindrome (palindromes are words that are spelt the same whether you write/read it forwards or backwards)
That process is never used, and has no name, since the process of sending outthe pulse can't tell you any information about the position of an object.However, if you collect and analyze some of the energy in the pulse after it reflectsoff of the solid object and returns to you, then you can derive a lot of informationrelated to the object's position, shape, composition, and speed. This technique isquite effective, is widely used, and is known as 'RADAR' .
FM means frequency modulation AM means amplitude modulation
I know the answer,but I just can reply it in Chinese.
One method to extract the intelligence (signal) from a high frequency carrier in FM receivers is with a phase locked loop.
A superheterodyne receiver is a Radio Frequency receiver method that multiplies the received signal frequency with a local oscillator frequency to get frequencies that are the sum and difference of the 2 frequencies. For example, if the received signal is 5MHz and the local oscillator frequency is 4MHz, they are multiplied together. 1MHz and 9MHz frequencies would be gotten. Usually the 1MHz is the Intermediate Frequency (IF). It will be admitted (through a band pass filter) later passed through the required electronic circuits for proper processing. There is also the method of the Variable Tuned Filter.
radar
Radar locates objects with radio waves.
This is likely describing the process of using radar technology to determine the position of a solid object. Radar works by emitting high-frequency radio waves towards an object and then measuring the time it takes for the waves to reflect back, allowing for calculations of the object's distance and position.
That process is never used, and has no name, since the process of sending outthe pulse can't tell you any information about the position of an object.However, if you collect and analyze some of the energy in the pulse after it reflectsoff of the solid object and returns to you, then you can derive a lot of informationrelated to the object's position, shape, composition, and speed. This technique isquite effective, is widely used, and is known as 'RADAR' .
radar
You're probably angling for the answer "Radar" or you could be fishing for the answer "Sonar" instead. To be a little more accurate, the object is not located by "sending out a pulse" of radio energy, but rather by analyzing the energy the object returns after the pusle is reflected off it. We can do the same thing with sound, and we locate things under water by this method. Bats locate insects in the air via sonar.
Experiments are a method for finding solutions to problems.
Relative frequency is a method of calculating the frequency of an event. Percentage frequency is a way of presenting the frequency of an event.
To find the position of an object from a velocity-time graph, you need to calculate the area under the curve of the graph. This area represents the displacement of the object.
The post method. ( As opposed to the get method ).
Write a simple program in finding roots x^3-6x^2+11x-6.1=0
listing method , factor tree