Ultrasound is sound with a frequeny above the range of human hearing.(Above 20 000Hz)
Frequencies above the human hearing range are called ultrasonic frequencies. These frequencies typically range from 20 kHz to several gigahertz and are often used in various applications such as ultrasonic cleaning and medical imaging.
ultrasonic
Inequalities
"Radio" is the generic name we give to electromagnetic radiation with frequencies less than 300 GHz (wavelengths greater than 1 millimeter).
"Radio" is the generic name we give to electromagnetic radiation with frequencies less than 300 GHz (wavelengths greater than 1 millimeter).
A reflex angle is between 180 and 360 degrees
west indies
During WW2 it was , by Japan , referred to as the 'Greater East Asia Co-Prosperity Sphere' .
The West Indies.
During WW2 it was , by Japan , referred to as the 'Greater East Asia Co-Prosperity Sphere' .
subwoffer
Once a tropical cyclone becomes a tropical storm (39 mph winds or greater) it is given a name by it's RSMC (Regional Specialized Meteorological Center)