Home 2.3 Kai and Maile: Penny Fingers

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2.3 Kai and Maile: Penny Fingers




Kai shows Maile how the composition of a penny changed after 1982 and how the differences in mass can be detected by noting the differences in inertia. Duration 2:53.



2.3a Why did Maile move her hands as she was trying to determine which penny on her fingers was heavier?
2.3b What metal is used to fill the inside of pennies manufactured after 1982?
2.3c Kai says, "What you're doing is you're measuring inertia--what it takes to lift that penny." Why would it have been better of him to have said "...what it takes to MOVE that penny"?

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