Àdàkọ:POTD/2007-05-19
Àwòrán Ọjọ́ Òní | |
A 2.38 g piece of aerogel supporting a 2.5 kg brick. Aerogel is a silicon-based substance and the world's lowest-density solid. It is composed of 99.8% air and is a stiff foam with a typical density of 3 mg per cubic centimeter. Aerogel holds 15 records for material properties, including best insulator and lowest-density solid. Aerogel can support 2000 times its own weight without collapsing. Photo credit: NASA |