Author Topic: Why does chalk make a squeaking noise on a blackboard? (Read 5131 times)
SMF 2.0.8 | SMF © 2011, Simple Machines
© 2000–2013 The Naked Scientists®
The Naked Scientists® and Naked Science® are registered trademarks. Information presented on this website is the opinion of the individual contributors and does not reflect the general views of the administrators, editors, moderators, sponsors, Cambridge University or the public at large.