Phthalates are another class of chemicals that are often used in deodorants and antiperspirants that you may want to avoid. Phthalates are used in cosmetics, synthetic fragrances, plastics, body care products and medical goods. They help to dissolve other ingredients and to create a better consistency.
A harmonic is a signal or wave whose frequency is an integral (whole-number) multiple of the frequency of some reference signal or wave. The term can also refer to the ratio of the frequency of such a signal or wave to the frequency of the reference signal or wave.
From the third formula in the above equation, it is more apparent that the harmonic mean is related to the arithmetic and geometric means.Equivalently, the harmonic mean is the reciprocal of the arithmetic mean of the reciprocals.As a simple example, the harmonic mean of 1, 2, and 4 is.The Harmonic mean is a Schur-concave function, and dominated by the minimum of its arguments, in the sense that for any positive set of arguments, Thus, the harmonic mean can not be made arbitrarily large by adding more big values to the argument set.he harmonic mean is related to the other Pythagorean means, as seen in the third formula in the above equation. This is noticed if we interpret the denominator to be the arithmetic mean of the product of numbers n times but each time we omit the j th term.