why is foam and cardboard a good insulator?

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why is foam and cardboard a good insulator?

pls answer for each material

2006-08-21 21:04:59 · 3 answers · asked by banglaaa 1 in Education & Reference ➔ Trivia

3 answers

A good insulator has trapped air between the layers. Foam has little bubbles of air trapped in it. Cardboard has air trapped in ridges. Hope that helps.

2006-08-21 21:10:53 · answer #1 · answered by my_alias_id 6 · 3⤊ 0⤋

This is a density subject, however both materials come in high and lower density forms,the higher the density, the better insulation.They also both retain heat , or cold.

2006-08-22 04:16:18 · answer #2 · answered by Ron~N 5 · 0⤊ 0⤋

Natural property of these materials.

2006-08-22 04:14:42 · answer #3 · answered by Sam 7 · 0⤊ 0⤋