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In this class, you will understand why materials undergo thermal expansion and contraction. The concept of linear expansion will also be discussed. Want to know more about this topic? Brasil Escola http://brasilescola.com/fisica/dilata... http://brasilescola.com/o-que-e/fisic... http://brasilescola.com/fisica/dilata... http://brasilescola.com/fisica/dilata... Mundo Educação http://mundoeducacao.com/fisica/dilat... http://mundoeducacao.com/fisica/dilat... http://mundoeducacao.com/fisica/exper... Follow us: Brasil Escola: http://www.brasilescola.com Facebook: / brasilescola Instagram: / brasilescolaoficial