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Item : JHL 701
Free
Falling Balls Set
No matter the mass of different substance, they are falling with the same velocity.
Free Falling Balls Set contains :
steel ball 32mm diameter x 1
wood ball 32mm diameter x 6
Teacher is holding two different ball on hands, standing on table, dropping
the balls at the same time, then student can listen the sound of collision of
steel and wood ball with floor at the same time.
Item : JHL 701
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