Physicians perform needle biopsies to sample tissue from, Ask an Expert

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Physicians perform needle biopsies to sample tissue from internal organs. A spring-loaded gun shoots a hollow needle into the tissue; extracting the needle brings out the tissue core. A particular device uses 8.4 needles that take 93 to stop in the tissue, which exerts a stopping force of 42 .

A) Find the impulse imparted by the tissue.

B) How far into the tissue does the needle penetrate?

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