Attractive nuisances can create liability risks. Learn what a home attractive nuisance is and see the most common attractive nuisance examples.
In mathematics, the harmonic mean (sometimes called the subcontrary mean) is one of several kinds of average, and in particular one of the Pythagorean means. Typically, it is appropriate for situations when the average of rates is desired. The harmonic mean can be expressed as the reciprocal of the arithmetic mean of the reciprocals. As a simple example, the harmonic mean of 1, 2, and 4 is 3 1 1 + 1 2 + 1 4 = 1 1 3 ( 1 1 + 1 2 + 1 4 ) = 12 7 .
Harmonic frequency is one component that helps us accurately determine the unique quality of sound made by different instruments, even when they are playing the exact same note. Definition: A harmonic frequency is a regular and repeating multiple of an original wave pattern, known as a fundamental frequency. So if the original wave is set at 500 Hz, it would experience a first harmonic frequency at 1000 Hz, or double the fundamental frequency.