[Help] If you are in physics and good at it click here to help please! Updates to this post /post/223240-if-you-are-in-physics-and-good-at-i Thu, 26 Nov 2009 15:57:06 +0100 The post was closed by ss_army /post/223240-if-you-are-in-physics-and-good-at-i#reply-7427430 ss_army Tue, 02 Dec 2008 00:25:21 +0100 Reply from ss_army /post/223240-if-you-are-in-physics-and-good-at-i#reply-4554210 yep B was right i misunderstood it thanks for all your help

]]> ss_army Tue, 02 Dec 2008 00:07:54 +0100 Reply from fsafee /post/223240-if-you-are-in-physics-and-good-at-i#reply-4554178 it is not A, not C, not D.

its B, like i said its density thats important. density = weight/ volume. it depends on both weight and volume.

c- ‘most heavy objects sink’ is wrong because you can have a veryy large low density object. say… you can get a huge ballooon that weighs 50 pounds… it still will not sink in water because it is less dense than water, no matter how much it weighs.

]]> fsafee Mon, 01 Dec 2008 23:56:11 +0100 Reply from ss_army /post/223240-if-you-are-in-physics-and-good-at-i#reply-4554164 thanks i got 2,3,4 right and haven’t tried 1 yet, is it C?

]]> ss_army Mon, 01 Dec 2008 23:49:52 +0100 Reply from fsafee /post/223240-if-you-are-in-physics-and-good-at-i#reply-4554129 1.. it depends on volume as well as weight.. its about density.. if its more dense than the liquid its in.. it will sink

2. the 2 blocks will displace same amount… they are same volume b

3. well alumnium is much less dense than lead meaning if they weight the same then thre is alot more volume of aluminum there. more volume = more displacement, therefore (if the aluminum is fully submerged) the lead will displace less water than aluminum

4. interesting question i first waned to say yes, but no… you need a pressure difference for it to have a buoyant force…

at least this is what i would have put. if u have any questions let me know

]]> fsafee Mon, 01 Dec 2008 23:22:04 +0100 Reply from ss_army /post/223240-if-you-are-in-physics-and-good-at-i#reply-4554095 just tried it and it was wrong

]]> ss_army Mon, 01 Dec 2008 22:57:04 +0100 Reply from dimentieva /post/223240-if-you-are-in-physics-and-good-at-i#reply-4554086 The answer to #1 is D

]]> dimentieva Mon, 01 Dec 2008 22:53:18 +0100