A chemical property is a characteristic of a pure substance that describes its ability to change into different substances. For example, a chemical property of methane is that it can catch fire and burn in air. Physical properties can be observed or measured without changing the composition of matter.
The downsides are obvious: Almost everyone has headphones, speakers, and other gadgets based on the ubiquitous 3.5 mm headphone jack. Eliminating this connection could render these devices unusable, or at least force everyone to carry around an extra adapter. But Apple doesnât care.
This guide is meant to give you a basic introduction to three main types of headphone cables and their general uses. The three most common headphone cables are 3.5mm, 2.5mm and 6.3mm cables. Below is a picture of each type and a summary of what each type of cable is used for. 3.5mm (1/8 inch): 3.5mm cables are found on most portable CD players, MP3 players and boom boxes.