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Bio practical help !!!

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Naruto123:
Can anyone tell me how to do question 2 b from Bio paper 3 may june 2009 _32

http://www.xtremepapers.me/CIE/International%20A%20And%20AS%20Level/9700%20-%20Biology/9700_s09_qp_32.pdf

Master_Key:

--- Quote from: 123456789 on May 03, 2011, 04:44:43 pm ---Can anyone tell me how to do question 2 b from Bio paper 3 may june 2009 _32

http://www.xtremepapers.me/CIE/International%20A%20And%20AS%20Level/9700%20-%20Biology/9700_s09_qp_32.pdf



--- End quote ---

4 division of stage micrometer = 0.3 mm

Radius = 0.15 mm

use 3.14 * ans2

= 3.14*.152

Naruto123:
Help me out here !!
How do u get 3 division to be 3 and radius as .15 ??
are we suppose to take da magnification into account ?

ure help is appreciated thx a lot !

Master_Key:

--- Quote from: 123456789 on May 05, 2011, 06:10:17 pm ---Help me out here !!
How do u get 3 division to be 3 and radius as .15 ??
are we suppose to take da magnification into account ?

ure help is appreciated thx a lot !

--- End quote ---

You have four marks in diagram so 3 divisions.

1division = 0.1 mm

Diameter = 0.3 mm

Radius = 0.3/2

R=0.15mm

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