Caffeine Information. Caffeine is naturally found in cocoa beans, coffee beans and tea and is synthetically produced for use in certain medications and in beverages. This substance is a stimulant drug that quickly enters the bloodstream and affects the brain.
Frequency Range Chart. The radio spectrum refers to the section of the electromagnetic spectrum that holds all possible radio frequencies ranging from 3 kHz to 300 GHz.Radio frequency is used for radio communication technology, wireless networks and telecommunication systems.he radio spectrum refers to the section of the electromagnetic spectrum that holds all possible radio frequencies ranging from 3 kHz to 300 GHz. Radio frequency is used for radio communication technology, wireless networks and telecommunication systems.
The frequency range of a musical instrument is called ambitus. The Frequency Range of a CATV amplifier are categorised as mentioned below; 1  Low Frequency Range are 1&nbsp;Hz to 150&nbsp;MHz. 2  Intermediate Frequency Range are 151&nbsp;MHz to 299&nbsp;MHz.  High Frequency Range are 300&nbsp;MHz to 50&nbsp;GHz.