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.
Connecting to a headphone jack. Plug one end of your cable into the headphone jack of your cassette deck, and the other to the line input (not microphone input) of your computer. The traditional line input of a desktop is blue with what looks like communication waves spreading outwards above it. To connect to your computer with a headphone jack, you will need a cable with a 3.5mm stereo plug on each end (or a cable with suitable adapters so that both ends terminate with a 3.5mm stereo plug). 2  Many cassette decks have unbalanced line outputs.