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105 - exam 4 - Fall 2008 - solutions

# 105 - exam 4 - Fall 2008 - solutions - Fall 2008 Physics...

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2. P=F/A P elephant /P clown = (15000/(4 π 6 2 ))/(150/(2 π 1 2 )) = 1.38, so P elephant >P clown Choice A. Problem 3. In the “collapsing can demo”, why did the can collapse when the air was pumped out? a. Too much sucking force pulling on the inside b. Too much pressure from air on the outside 3. The force was applied by atmospheric pressure. Choice B. Problem 4. How deep does a scuba diver have to dive before the pressure is 2 atm? a.
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105 - exam 4 - Fall 2008 - solutions - Fall 2008 Physics...

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