MadSci Network: Microbiology
Query:

Subject: can a bacterium reproduce to the weight of the earth in 24hrs?

Date: Tue Mar 21 17:42:29 2000
Posted by Julie Van Tassel
Grade level: 10-12 School: No school entered.
City: Natick State/Province: MA Country: US
Area of science: Microbiology
ID: 953682149.Mi
Message:

 The bacterium ~ weight=10 to the negative twelth power g
                 ~ takes 20 minutes to reproduce
The earth ~ weight = 5.9763 x 10 to the 24th power kg

I have tried to calculate the the answer and i came up with 7.2 to the -12 
power.  But it doesn't sound right to me.  What i did was i found the 
number of times it would reproduse in 1 day and i got 72 times.  Then i 
multiplied 72 times one bacterium which is 10 to the -12.  I came up with 
the answer above.  

What formula do I use to calculate this?  My calculator will not go up to
that high of a number.



Response:


Re: can a bacterium reproduce to the weight of the earth in 24hrs?
 The bacterium ~ weight=10 to the negative twelth power g
                 ~ takes 20 minutes to reproduce
The earth ~ weight = 5.9763 x 10 to the 24th power kg

I have tried to calculate the the answer and i came up with 7.2 to the -12 
power.  But it doesn't sound right to me.  What i did was i found the 
number of times it would reproduse in 1 day and i got 72 times.  Then i 
multiplied 72 times one bacterium which is 10 to the -12.  I came up with 
the answer above.  


_______________________________________________________________
Ah, but you are not accounting for the fact that each of the 
daughter bacteria will also divide 20 times per day, and each of the 
daughters of *those* divisions will divide 20 times per day, and...

You need to use something similiar to the formula for calculating
compound interest.

	Dan Berger, Admin MadSci Network
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Re: can a bacterium reproduce to the weight of the earth in 24hrs?

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