It's a good book
You can remagnetize a magnet by rubbing a good magnet along the bad one. Do this a few times. Be sure to rub the magnet in only one direction.
a summary is most of the time good and a critique can be good or bad depending on the paper.
not a summary.
Neither or both.
no, not really, any summary will give an inaccurate and misleading picture. A good example of this is the summary given on answers.com.
brain drain conclution
No
You are probably talking about an electro magnet. For detailed explanations and some good drawings see the link on electromagnets here:
A good summary will avoid unnecessary details, repetition, and personal opinions or biases. It should focus on the main points and key information of the original text.
a good boy is one that you do not get into trouble
its good but expensive