You can't you can only do that on PC's
The minimums are based on what you are. If you are a student 1GB RAM and 160GB Harddisk is the basic requirements. If you are a gaming person or a professional who wants fast computer then 2GB RAM and 250GB Harddisk is enough.
Yes. You can connect a laptop harddisk (2.5" form factor) to a desktop. Easiest option is to use a 2.5" external harddisk enclosure and connect it to desktop using a USB port. You need to check if the HDD is Serial or Parallel ATA and you can get a corresponding enclosure. - Neeraj Sharma
hard-disk
If your laptop battery fails or no longer holds a sufficient charge, you can easily replace it. But as long as it is working fine then you don't need to replace it.
no you can not
A (harddisk) is a hard drive that stores and provides quick access to large amounts of data.
i agree
You should go to a expert for that. I strongly do not recommend taking apart your laptop
Some laptop microphones have internal errors with them, so you should replace them. You can replace them at BestBuy or any other electronic store for a lesser price.
No, they are not the same thing.
Not enough info. Which model?
$200