arderea fibrelor naturale si a celor sintetice
DESCRIPTION
Arderea fibrelor naturale si a celor sintetice. Realizat de Stefan Mihaela Cocu Ciprian Colegiul National “Vasile Alecsandri” Galati, Romania. Obiectivul lucrarii. Observarea diferitelor proprietati ale fibrelor sintetice si naturale prin ardere. Modul de lucru. - PowerPoint PPT PresentationTRANSCRIPT
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Arderea fibrelor naturale si a celor sinteticeRealizat de Stefan Mihaela Cocu CiprianColegiul National “Vasile Alecsandri”Galati, Romania
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Obiectivul lucrarii
Observarea diferitelor proprietati ale fibrelor sintetice si naturale prin ardere.
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Modul de lucru
se taie fasii de 2 cm latime din fiecare material se ia fiecare fasie si se pune pe foc se monitorizeaza intregul process pentru fiecare material in
parte
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Arderea bumbacului
Prima mostra de material a fost bumbacul. Cu clestele am luat fasia si am pus-o in flacara.
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Lana
Lana este o fibra naturala ce ia foc doar sub flacara continuua avand un miros neplacut
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Hartia
Al treilea material a fost hartia. Aceasta a ars rapid , lasand o cenusa gri, sfaramicioasa.
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Matasea artificiala Matasea
artificiala este o fibra sintetica ce arde rapid lasand o cenusa neagra , fina
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Stofa Stofa este alcatuita din
fibre sintetice avand o viteza de ardere foarte mare. Aceasta aproape s-a “topit” la flacara , lasand in urma o cenusa moale, malebila.
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Cauciucul Sintetic. Cauciucul sintetic este
o fibra sintetica ce arde cu o viteza moderata , dar degaja un miros extrem te neplacut.