fahaddakhil3186
21.09.2021 •
Chemistry
What is rebar and why is it needed to make tall buildings?
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Ответ:
rebar
is gridwork of steel rods
Explanation:
Reinforced concrete is one important component of skyscrapers. It consists of concrete (a mixture of water, cement powder, and aggregate consisting of gravel or sand) poured around a gridwork of steel rods (called rebar) that will strengthen the dried concrete against bending motion caused by the wind.
Ответ:
the signing of The Treaty of Versailles
Explanation: