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A silicon cantilever weighing 5 0 femtograms resonates at a natural frequency of 6 . 4 kHz . If the same cantilever is used to

A silicon cantilever weighing

50

femtograms resonates at a natural frequency of

6.4

kHz

.

If the same cantilever is used to tug on a molecule which breaks when the cantilever bends by

1

,

what is the force required to break the molecular bond?

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