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Q. A small fly of mass 0.27 grams is caught in a spider's web. The web vibrates predominately with a frequency of 4.50 Hertz. What is the value of the effective spring constant stiffness constant for the web?

Q. A certain radioactive isotope placed near a Geiger counter registers 352 counts per minute. 100 hours later, the counter registers 11 counts per minute. What is the half life of isotope?

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