W : Build on studentsâ knowledge of literary elements by explaining how to draw conclusions, including determining the theme, based on information in folklore. H : Engage students by using the story Goldilocks and the Three Bears to model how to draw conclusions based on text.
For a signal whose fundamental frequency is f, the second harmonic has a frequency 2 f, the third harmonic has a frequency of 3 f, and so on. Let w represent the wavelength of the signal or wave in a specified medium. The second harmonic has a wavelength of w /2, the third harmonic has a wavelength of w /3, and so on.
In 1956, the second was redefined in terms of a year relative to that epoch. The second was thus defined as the fraction 1 â 31,556,925.9747 of the tropical year for 1900 January 0 at 12 hours ephemeris time. This definition was adopted as part of the International System of Units in 1960. Atomic second