Respostas para dúvidas sobre vidros
Autor: PIBID QUÍMICA UEMS | Publicado: 2011-05-31T14:21:00-04:00

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 <![endif]-->  Anônimo disse... ola meu nome é milena e queria dizer que gostei muito do blog..e gostaria de saber oqsignifica isso Feldspato.. 
 Resposta:Bom dia Milena.&nbsp;Feldspato é o nome dado a muitos minerais de cor clara, frequentes nas rochas eruptivas, sendo um mineral bastante comum na crosta terrestre. Faz parte da composição de inúmeras rochas, dentre elas o granito. Pode ter coloração que vai do acinzentado ao avermelhado. É composto basicamente por silicato de potássio e alumínio. 

Anônimo disse... oi, meu nome é leticia, estudo no tancredo neves, 1ºa e eu gostaria de saber o porque a areia derrete com o calor do fogo e se torna um material sólido? Embora o vidro ser composto por mais outros elementos! 
Resposta:Bom dia Leticia.&nbsp;Todo material possui um ponto de fusão (PF), onde abaixo dele o material vai estar sólido e acima, este mesmo material estará líquido, ainda existe o ponto de ebulição (PE), no qual este material ou substância passa ao estado gasoso, desta forma, quando a sílica é utilizada para a fabricação do vidro, é fornecido calor, este calor vai fazer com que a areia (sílica) que esta no estado sólido, comece a passar para o estado líquido. Este processo ocorre a aproximadamente a 1713º C e quando ela se resfria volta ao estado sólido, ou seja ao seu estado original.

Anônimo disse... OoOiii meu nome é Jéssica, estudo na escola tancredo neves no 1°a... Adorei conhecer um pouko mais sobre o vidro, de onde ele vem, komo se faz etc... Gostaria de saber se vcs conhese algum lugar aqui em Dourados onde podemos estar levando alguns vidros cem mas utilidades ? bjao ;) 
Resposta:Bom dia Jéssica.Em Dourados o único lugar que temos certeza que coleta vidros descartados pela população é no Supermercado Chama, outra possibilidade é através dos catadores de lixo reciclável de Dourados.

Isabela disse... oooi, ta mtto legal o blog ..Parabéens ! é eu sei que não existe só um tipo de vidro blindado,mas intão eu queria saber quais são os outros tipos de vidros blindados, a que tipo de arma (tiro) cada um resiste, como funciona o vidro blindado e eu queria saber tmb quais são as etapas na blindagem de um carro? Meu nome é Isabela ,estudo na Escola Tancredo Neves no 1°ano"A" .. Mtto obrigado 
Resposta:Bom dia Isabela.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Como você mesma menciono na sua pergunta, não existe só um tipo de vidro blindado, na verdade existe quatro tipos de vidros blindados, são eles, o anti-acidentes, anti-vandalismo, anti-arrombamentos e anti-balas.Já quando você se refere aos tipos de armas que um vidro blindado resiste, estamos falando de um único tipo de vidro, ou seja, o vidro blindado anti-balas. Este tipo especifico, segue normas rígidas da Associação Brasileira de Normas Técnicas (ABNT)&nbsp; e esta resumido na tabela abaixo:
Tabela 1 – Nível de proteção do sistema de blindagem quanto ao impacto balístico.
&nbsp;
&nbsp;Legenda: - LRHV – Long Rifle High Velocity- RN – Round Nose- FMJ – Full Metal Jacketed- JSP – Joint Soft Point- SW GC – Semi WadCutter Gas Check- AP – Armor Piercing
Tabela 2 – Nível de proteção alternativa de sistema de blindagem
quanto ao impacto balístico.

&nbsp;&nbsp; Já a blindagem de um automóvel pode ser vista no seguinte vídeo:http://www.youtube.com/watch?v=PlNHEDlh92I&amp;feature=player_embedded&nbsp;