why are school bells made of metals?

School bells are made up of metals or alloy:-

Because metals have a property(except Hg) to produce sonorous(production of sound in metals when a metal is struck on the surface of metal),that’s why metals  are used in making bell to produce a high  hearable frequency sound.

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metal are sonorous, they produce ringing sound when hit thereforeschool bells made of metals.

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Because they are sonorous.

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