A fly is walking around the groove of a 33 r.p.m. record. The record is lying flat on the floor, and when looked at from above, the fly appears to be traveling clockwise. If it carries on in this way, will it eventually arrive at the edge of the record or the center?
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It will arrive at the outer edge. When a record is played on a turntable, it revolves clockwise when seen from above, and relative to the record, the needle moves counterclockwise. If the needle-and hence the fly-were to move clockwise around the groove, it would end up at the outer edge.
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