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Question: computer chips are etched on circular cylinder wafers of thickness 0.60mm that are sliced from a solid cylindrical silicon crystal of length 30cm . If each wafer can hold 100 chips, what is the maximum number of chips that can be produced from one entire cylinder.
To use a chip-enabled credit card, you insert it in the bottom of a payment terminal and leave it there for the duration of the transaction. Importantly, the card needs to remain in the reader until the transaction finishes, not swiped like a magnetic strip.