All modern cd-r drives are writable, such that you can go back and burn additional data onto the cd-r disc until the disc is full.
Answer: Science, Technology, Engineering, Mathematics,
Explanation:
I know because I participate in a STEM club
I believe its when some one does engineering as a hobby.
The answer is number 2 accessible
A power supply, such as those in a computer, take the power from the given outlet, and send it through the computer into the hardware it need to run on. A battery has a certain amount of power which is in some cases, continuously draining.