A student uses a bar magnet to pick up a nail. He then touches the tip of the nail to some staples. Why do some of the staples stick to the nail? The nail and the bar magnet are now both permanent magnets. The nail has become a temporary magnet, while the bar magnet remains a permanent magnet. The nail has become a permanent magnet, while the bar magnet has become a temporary magnet. The nail and the bar magnet are now both temporary magnets.

the answer is the nail has become a temporary magnet