Modular programming is a software design technique that emphasizes separating the functionality of a program into independent, interchangeable modules, such that each contains everything necessary to execute only one aspect of the desired functionality.
HOW FM / FREQUENCY MODULATION RADIO WORKS - 1950's
If a person taps on the microphone in front of the speakers, the reverberation travels through the mic, into the amp, and out of the speakers. Simple enough, right? But the key here is that the mic is in front of the speakers. The continuous sound created by the initial resonance that ends up coming out of the speakers is then picked up by the microphone, which creates a circular audio loop that amplifies its own frequency—and creates the uncomfortable, high-pitched screech known as feedback.
When wind is forced through narrow valleys it is known as the "funnel effect" and is explained by Bernoulli's theorem. According to Bernoulli's theorem, pressures are least where velocities are greatest; likewise, pressures are greatest where velocities are least.
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