Dear students, if you were affected by the recent 4 days of unavailability of Giancoli Answers, please accept my humble apology. There was an issue with disk space being used up by automated server updates, and the server eventually ran out of space, rendering the website unresponsive. This happened to coincide with me taking a four day long weekend! I have fixed the issue, and improved the server monitoring, so I don't expect an outage of such a long duration to happen again.
As always, best wishes with your studies,