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Out of two, which one would make a higher pitch and why? 1) A post card , rubbed slowly against a comb? 2) A sandpaper , rubbed rapidly against a comb? |
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Answer» Out of two, which one would make a higher pitch and why? 1) A post card , rubbed slowly against a comb? 2) A sandpaper , rubbed rapidly against a comb? |
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