1.

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?

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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