Ultrasound, like audible sounds, is transmitted by means of longitudinal waves. Ultrasound is used in medicine to break up kidney stones and gall stones. It is also used, in a process known as ...
For water waves and sound waves the unit hertz is usually good enough but radio and TV waves have such a high frequency that the kilohertz (\(kHz\)) or even the megahertz (\(MHz\)) are better units.
In Pakistan, a Trump impersonator sings to promote pudding. A food vendor who, according to locals, looks remarkably like U.S. President-elect Donald Trump attracts more business and attention than ...