A Small Centrifuge Head Has 12 Spots (Holes) Labeled in a Manner

question 12

Multiple Choice

A small centrifuge head has 12 spots (holes) labeled in a manner similar to a clock face. There are three tubes of equal volume that need to be centrifuged. In which of the following choices for tube placement would the centrifuge be balanced?

• A) 1, 2, 3
• B) 1, 4, 7
• C) 1, 5, 9
• D) 1, 3, 8

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Definitions:

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