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.
Plugging in a headset, microphone or speakers. Speakers, microphones and headsets have one of two types of plug: mini jack plugs or a USB plug. Mini-jack plugs look like typical headphone plugs. You'll have two plugs which have corresponding ports on your computer. Mini jacks come in different styles. Some are color-coded with one pink or black with a pink band and one green or black with a green band. Others have symbols with a microphone symbol on one jack and a headphone symbol on the other.