Part I of this review highlights key historical high points of the research odyssey that cracked the longevity code and provides the reader with a backstage pass to meet the enzymes encoded by SIRT1âthe seven nutrient-responsive NAD+-dependent histone deacetylase enzymes, dubbed the sirtuins.
To calculate the wavelength of a radio wave, you will be using the equation: Speed of a wave = wavelength X frequency. Since radio waves are electromagnetic waves and travel at 2.997 X 10^8 meters/second, then you will need to know the frequency of the radio wave. If the radio wave is on an FM station, these are in Megahertz.
The Radio Frequency Spectrum In the radio frequency spectrum (Figure 1-2), the usable frequency range forradio waves extends from about 20 kHz (just above sound waves) to above30,000 MHz. A wavelength at 20 kHz is 15 kilometers long. At 30,000 MHz,the wavelength is only 1 centimeter.