This document is a commentary on the solutions to the 1999 ENEM physics exam. It discusses the exam questions and provides explanations for the answers. It also includes the author's contact information on various social media platforms like Facebook, Twitter, Slideshare, and others to allow students to connect with him online for additional exam preparation help.

2. ENEM 1999
RESOLUÇÃO COMENTADA DE FÍSICA
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33.  Facebook:
www.facebook.com/professorwaltinho
 Twitter: www.twitter.com/WalterAlencar1
 Slideshare: www.slideshare.net/WalterAlencar
 Flickr:
www.flickr.com/photos/professorwaltinho
 Formspring:
www.formspring.me/profewaltinho
 Orkut: www.orkut.com/walteralencar
 Sype: professor.waltinho3
 msn: professorwaltinho@hotmail.com