March 06, 2021, 09:45:57 AM
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Topic: A mol of bb's would cover the state of New Jersey to what depth?  (Read 14609 times)

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Offline edimerz

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Re: Chem question (confusing)
« Reply #15 on: May 19, 2006, 05:54:18 AM »
Ok, if it is ball bearings, then how we go ahead?

Offline P

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Re: Chem question (confusing)
« Reply #16 on: May 19, 2006, 06:00:32 AM »
Estimate the dimentions of the bb  --  say 1 - 1.5 mm in diameter??    Work out the area 1 mole (6.02*10^23) of bbs would cover.  Divide this by area of the state to find out the number of layers of bbs you have  -  multiply by the diameter for the depth.
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Offline edimerz

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Re: Chem question (confusing)
« Reply #17 on: May 19, 2006, 06:01:35 AM »
This can be of help:
Search for BB in dictionary.com:

http://dictionary.reference.com/search?q=bb

Offline edimerz

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Re: Chem question (confusing)
« Reply #18 on: May 19, 2006, 06:09:20 AM »
Sorry - but, ball bearings can be of different sizes (?), can  it be baseball (in general size is same).

Offline Borek

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Re: Chem question (confusing)
« Reply #19 on: May 19, 2006, 09:05:46 AM »
Estimate the dimentions of the bb  --  say 1 - 1.5 mm in diameter??    Work out the area 1 mole (6.02*10^23) of bbs would cover.  Divide this by area of the state to find out the number of layers of bbs you have  -  multiply by the diameter for the depth.

Not so easy - distance between layers is not R (or 2r).
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Offline P

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Re: Chem question (confusing)
« Reply #20 on: May 19, 2006, 11:33:12 AM »
Not so easy - distance between layers is not R (or 2r).

Ahh...   I see where your coming from  -  are you suggesting they hexagonally close pack the layers on top of each other so that 3 layers for example would not equal to 3R!?   I think that this is fast becoming a maths/geometry question then!  the only chemistry really is the fact that 1 mole is 6.02 x 10^23.  I think I'm right in saying that you have to estimate the diameter of the bb though (otherwise the question is impossible)  - 

Sorry - but, ball bearings can be of different sizes (?), can it be baseball (in general size is same).

I certainly have never seen a baseball sized ball bearing. It would be quite heavy.
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Offline edimerz

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Re: Chem question (confusing)
« Reply #21 on: May 19, 2006, 11:37:05 AM »
Quote
I certainly have never seen a baseball sized ball bearing. It would be quite heavy.

Sure!
« Last Edit: May 19, 2006, 11:45:54 AM by Borek »

Offline Borek

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Re: Chem question (confusing)
« Reply #22 on: May 19, 2006, 11:45:39 AM »
Ahh...   I see where your coming from  -  are you suggesting they hexagonally close pack the layers on top of each other so that 3 layers for example would not equal to 3R!?

Yep.
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