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Izmad
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Homework Statement
a) A very powerful vacuum cleaner has a hose 2.91 cm in diameter. With no nozzle on the hose, what is the weight of the heaviest brick that the cleaner can lift?
(b) A very powerful octopus uses one sucker of diameter 2.91 cm on each of the two shells of a clam in an attempt to pull the shells apart. Find the greatest force that the octopus can exert in salt water 32.3 m depth.
Homework Equations
p=F/A
P=P(atm)+pgh
A=pi*r^2
density of salt water=1.025kg/m^3
P(atm)=1.013*10^5 Pa
The Attempt at a Solution
I'm a little confused. This is what I did with question b.
Pressure=P(atm)+(1.025)(9.8)(32.3)=1.016*10^5
A=pi*(.0146)^2=.0007
Area*Pressure=Force .0007*1.016*10^5=71.12 N
THIS IS WRONG. I'm not sure what I'm doing wrong. Can someone please explain
And i don't know what to do with question a. I found the area of the vacuum. But I'm not sure how to figure out a mass. Does P(atm) play a role in this? Could i get some direction please?
Thanks
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