HELP, DOING SCIENCE HOMEWORK!!!

Psycho18

Platinum Member
Nov 4, 2001
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OK, I need to define density and give 3 examples of its definition...(example--ice is less dense then liquid water, so ice floats on the water. Thats only an example, I cant use it.
 

Ionizer86

Diamond Member
Jun 20, 2001
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p=m/v; Density equals unit mass per unit volume. ie having 13 grams of mercury per mL of that stuff.
 

guyver01

Lifer
Sep 25, 2000
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your head is more dense than air, so it doesnt float away, unlike helium, which when filled into the more dense balloon to capture and contain it, does float away?



 

VBboy

Diamond Member
Nov 12, 2000
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One megabyte of a Zipped file is more dense than one megabyte of an Unzipped file!
 

CubicZirconia

Diamond Member
Nov 24, 2001
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Seriously, did this homework really warrant an all caps title and three exclamation points? Look up density in a dictionary. And I'm sure you can find dozens of charts that list densities of various materials to get your examples.
 

DanFungus

Diamond Member
Jul 27, 2001
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bowling balls are more dense than milk, so they sink
rolleye.gif
 

VBboy

Diamond Member
Nov 12, 2000
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Originally posted by: Psycho14
Whats the definition of Density??

I told you, go to Dictionary.com - they have an encyclopedia/thesaurus linked from there, you can find your definition there.
 

Psycho18

Platinum Member
Nov 4, 2001
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OK, I have another question. How can I relate convection and density to the structure of the earth, to explain the driving mechanism of plater tectonics.
 

Hayabusa Rider

Admin Emeritus & Elite Member
Jan 26, 2000
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Simply put, density is mass per unit volume.

Re: Plates and stuff-

I would show you my skills of an artist, but in a post here I cannot. Besides I am too lazy. The rock that floats above the mantle is less dense. Else it would sink. Now heat from the earths core is brought to and travels through the mantle via convection. Convection is really the circulation of heated material. The convection currents move to the topmost layer of the mantle, and as they do, the crust moves too. Simple. You see this if you put something that floats in water, and then heat it. As it moves, so does the floating object.
 

Psycho18

Platinum Member
Nov 4, 2001
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ok, ive completed my 9th grade homework. Thank you all for helping. I LOVE ANANDTECH!!!