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Warm up 5/15/13

Warm up 5/15/13. Question: What are the units for MA? Answer: No units! Goal: I will calculate MA for levers. Element of the day. 77 – Iridium – Ir

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Warm up 5/15/13

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  1. Warm up 5/15/13 • Question: What are the units for MA? • Answer: • No units! • Goal: I will calculate MA for levers.

  2. Element of the day • 77 – Iridium – Ir • Iridium is widely quoted as being the densest element, but this is because of an incorrect value for its atomic weight, which never got corrected on density charts. • It is expensive and so is usually only used in small amounts, like in high-end spark plugs, which will last much longer if tipped with iridium.

  3. Lever Lab • Murray Levers • Tonight’s HW • Murray Levers • Review Crossword • Test Fri, ch 7, 8, 9 Agenda / HW

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