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so that they produce the sound louder.
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BECAUSE THEY ARE SONOROUS
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Metals produced ringing sound i.e,sonorous when struck hard
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Since metals are SONOROUS, so the school bells are made up of metals so that they produce loud sound when striked with force.
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METALS HAVE A PROPERTY KNOWN AS SONOROUSITY. THIS PROPERTY ENABLES METALS TO PRODUCE A RINGING SOUND WHEN BANGED.SO SCHOOL BELLS ARE MADE UP OF METALS.
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so it can be heard in all classes of the school
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because they are very sonorous and produce loud sounds when the are hit by something.
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because metals are sonorus in nature and thus produce loud sound when hit by a hammer(armature).
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BECAUSE THEY ARE SONOROUS