UCSB Science Line
Sponge Spicules Nerve Cells Galaxy Abalone Shell Nickel Succinate X-ray Lens Lupine
UCSB Science Line
Home
How it Works
Ask a Question
Search Topics
Webcasts
Our Scientists
Science Links
Contact Information
Is there any type of testing that could be used to determine how long a metal bolt has been imbedded in the sidewalk? Thank you
Question Date: 2002-12-30
Answer 1:

This is a difficult question best suited for a forensic scientist, or an archaeologist. Firstly, the question to be asked is how old is the bold. Secondly, how old is the sidewalk? If these can be determined and are the same, then a good guess is that the newly bought bolt was hammered into the sidewalk.

How would the ages of the bolt and the sidewalk be determined? If it is a concrete sidewalk, a cement chemist would be able to tell the age from the way the concrete looks under an electron microscope.

The age of the bolt, one might be able to tell using a suitable dating method.

On the whole, it is a very difficult problem to answer in the general case. In the specific case that the bolt looks somewhat new, one could go to Home Depot and look for similar bolts, and then go on from there.



Click Here to return to the search form.

University of California, Santa Barbara Materials Research Laboratory National Science Foundation
This program is co-sponsored by the National Science Foundation and UCSB School-University Partnerships
Copyright © 2017 The Regents of the University of California,
All Rights Reserved.
UCSB Terms of Use