What is Kevlar? Detailed answer

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What is Kevlar? Detailed answer

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What is Kevlar?

This synthetic material is five times stronger than steel. They make bulletproof vests and military uniforms from it.

Author: Mendeleev V.A.

Random interesting fact from the Great Encyclopedia:

When was one moment equal to one and a half minutes?

The medieval English measure of time, equal to one and a half minutes, was called a moment. 40 moments equaled one hour on a sundial.

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Airport Self-Driving Wheelchairs 15.05.2019

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