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Earth's magnetic field
Measurement and real-life
Nobel Prize winners
Physics meets biology
Physics meets Earth science
Semiconductors and computers
Theme park physics
Units of measurement
All about contrabass
A site devoted to the instruments that play the lowest of the low notes.
Changing your voice
The speed of sound is greater in helium than in air, which can create unusual and entertaining results.
Earthquakes occur when "faults" in the Earth slip, creating complex and potentially destructive waves in the ground.
Low frequency organ notes
The organ in the Syndey Town Hall can produce a low note at a frequency of 8 Hertz, which can be felt but not heard.
Snapping a whip
The "crack" of a whip is created by causing the tip of the whip to travel faster than the speed of sound. It is a miniature sonic boom.
Sound from a black hole
Astronomers have discovered sound coming from a black hole in the form of waves through the matter surrounding it.
Sound in the ocean
This extensive site discusses all the aspects of sound in the ocean, including navigation by sound, the sound channel (through which sound can travel for thousands of miles), and whalesong.
Synthesizing musical sounds
Music synthesizers combine sinusoidal waves to create complex musical waveforms. A technique called Fourier analysis can be used to determine the amount of each harmonic to contribute to the final waveform.
What does a sonic boom look like?
An amazing photo of a cloud forming around a plane due to a sonic boom.