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Buoyancy

What is Buoyancy?
by

Sarah Cranfill

on 20 September 2010

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Transcript of Buoyancy

Buoyancy
By Sarah Cranfill Definition of buoyancy.... Buoyancy is the ability to remain afloat in a liquid or rise in air or gas. The upward force that a fluid exerts
on an object is less dense than itself. A blimp is used in sports events to take
footage of games. Example One...
A Blimp A blimp is a soft, non-rigid, buoyant airship. Example Two...
A Boat A boat is used for trading, transportation, and fishing. The way a boat floats is, because of their design.
When a boat is fully loaded it will sit lower in
the water, since its surface area to weight ratio
is different than when the boat is light. A boat
will remain stable if it is not overloaded. Example Three... A Submarine A submarine stays aloft, because of the ballast tanks.
The ballast tanks can be found between the ships
inner and out hulls. Vents on top of the
ballast tanks are opened.
Seawater coming in throught the flood
ports forces air out the vents & the sub sinks. Example Four...
Hot-Air Balloon When air is heated, it expands, becoming less dense than the air that is not heated. If the hot air is contained as it is in a balloon, it can force additional weight up into the air. A Hot-Air Balloon is used for sports, and
commercial advertisements. Cites
http://www.eballoon.org/balloon/balloon-usages.htmles
http://www.answers.com/topic/buoyancy
http://chemistry.about.com/od/sciencefairprojectideas/a/physicsprojects.htm
http://www.thefreedictionary.com/Blimp
http://www.ehow.com/how-does_4909612_how-boat-buoyancy-works.html
http://www.wisegeek.com/how-do-boats-float.htm
http://www.onr.navy.mil/Focus/blowballast/sub/work3.htm
http://www.hotairballoons.com/hotairballoon-air-pressure.asp
http://www.pa.msu.edu/sciencet/ask_st/082494.html Cites Part 2
http://www.google.com/imgres?imgurl=http://upload.wikimedia.org/wikipedia/commons/6/62/USNavySeawolfSubmarine.jpg&imgrefurl=http://commons.wikimedia.org/wiki/File:USNavySeawolfSubmarine.jpg&usg=__crpHBOcy24Rxl0rMlfN92BYijiA=&h=420&w=620&sz=59&hl=en&start=33&zoom=1&tbnid=nMY2v1_c0rgmHM:&tbnh=140&tbnw=193&prev=/images%3Fq%3Dsubmarine%26um%3D1%26hl%3Den%26safe%3Dactive%26biw%3D1280%26bih%3D610%26tbs%3Disch:10%2C12350%2C1235&um=1&itbs=1&iact=hc&vpx=495&vpy=179&dur=2522&hovh=185&hovw=273&tx=133&ty=139&ei=oA-STJOkLsK88gbgm-SjBg&oei=kg-STKLdJcL58AbtkPS4BQ&esq=3&page=3&ndsp=18&ved=1t:429,r:14,s:33&biw=1280&bih=610

http://www.google.com/imgres?imgurl=http://www.amnightlife.com/lifestyle/wp-content/uploads/2008/07/hot-air-balloon.jpg&imgrefurl=http://www.amnightlife.com/lifestyle/%3Fcat%3D5&usg=__f0-iJfDzvvFgya3cqeyyvT9o0Aw=&h=531&w=398&sz=51&hl=en&start=0&zoom=1&tbnid=gLCMCbUwB8y_RM:&tbnh=149&tbnw=101&prev=/images%3Fq%3Dhot-air%2Bballoon%26um%3D1%26hl%3Den%26safe%3Dactive%26biw%3D1280%26bih%3D610%26tbs%3Disch:1&um=1&itbs=1&iact=hc&vpx=701&vpy=52&dur=448&hovh=259&hovw=194&tx=65&ty=168&ei=3w-STKbyCML58AaP4MWvBQ&oei=3w-STKbyCML58AaP4MWvBQ&esq=1&page=1&ndsp=20&ved=1t:429,r:4,s:0

http://www.google.com/imgres?imgurl=http://www.discoveringfloridakeys.com/photos/glass-bottom-boat.jpg&imgrefurl=http://www.discoveringfloridakeys.com/glass_bottom_boat.php&usg=__zlJP_UOhx7NWDMApLZYNYxHx7Tk=&h=338&w=450&sz=28&hl=en&start=15&zoom=1&tbnid=aWMXBWCg0NPPFM:&tbnh=139&tbnw=196&prev=/images%3Fq%3Dboat%26um%3D1%26hl%3Den%26safe%3Dactive%26biw%3D1280%26bih%3D610%26tbs%3Disch:10%2C4370%2C437&um=1&itbs=1&iact=hc&vpx=137&vpy=322&dur=1908&hovh=194&hovw=259&tx=186&ty=115&ei=NxCSTNDBNsP48AbK5oG_Bg&oei=JBCSTOeMCYH58AbR8aWuBQ&esq=2&page=2&ndsp=16&ved=1t:429,r:6,s:15&biw=1280&bih=610

http://www.google.com/imgres?imgurl=http://www.goodcleantech.com/images/personal%2520blimp.bmp&imgrefurl=http://www.goodcleantech.com/2007/08/the_personal_blimp_the_beginni.php&usg=__oYlguVYiNxZcTE5q9Zr6CBrzOtM=&h=412&w=449&sz=543&hl=en&start=0&zoom=1&tbnid=NsEROBynfwpFVM:&tbnh=122&tbnw=130&prev=/images%3Fq%3Dblimp%26hl%3Den%26biw%3D1362%26bih%3D559%26gbv%3D2%26tbs%3Disch:1&itbs=1&iact=hc&vpx=115&vpy=95&dur=718&hovh=215&hovw=234&tx=136&ty=132&ei=_86QTLSUB4W0lQeF8dDkAQ&oei=_86QTLSUB4W0lQeF8dDkAQ&esq=1&page=1&ndsp=21&ved=1t:429,r:0,s:0 A Submarine is used to dive under the water.
They are used to explore depths unseen, and secretly attack.
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