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Author Topic: BIOLOGY P32 DISCUSSION ONLY ( AS LEVEL )  (Read 13152 times)

Offline XYZ91

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Re: BIOLOGY P32 DISCUSSION ONLY ( AS LEVEL )
« Reply #105 on: June 02, 2009, 02:07:57 pm »
Quote from: pikutata on June 02, 2009, 02:03:34 pm
whats the radius? is it 3x100micrometers . then u divided it by 2? i beliv u get 150micrometer? change it to mm.


0.15 mm
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Offline pikutata

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Re: BIOLOGY P32 DISCUSSION ONLY ( AS LEVEL )
« Reply #106 on: June 02, 2009, 02:11:23 pm »

[/quote]

0.15 mm
[/quote]

yeah, so thats the radius? the eyepiece thing is there just to confuse us?
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Offline XYZ91

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Re: BIOLOGY P32 DISCUSSION ONLY ( AS LEVEL )
« Reply #107 on: June 02, 2009, 02:12:06 pm »
Quote from: pikutata on June 02, 2009, 02:11:23 pm


0.15 mm
[/quote]

yeah, so thats the radius? the eyepiece thing is there just to confuse us?
[/quote]

The radius is 0.15 mm. Yes, that was to create confusion.
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Offline lys90

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Re: BIOLOGY P32 DISCUSSION ONLY ( AS LEVEL )
« Reply #108 on: June 02, 2009, 02:14:41 pm »
yea i counted 28 also... :D
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Offline pikutata

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Re: BIOLOGY P32 DISCUSSION ONLY ( AS LEVEL )
« Reply #109 on: June 02, 2009, 02:16:10 pm »
Quote from: lys90 on June 02, 2009, 02:14:41 pm
yea i counted 28 also... :D

me too. some of them are blurry, and some of them are halves...

but i counted those full stomata and i get 28.
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Offline dcgs

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Re: BIOLOGY P32 DISCUSSION ONLY ( AS LEVEL )
« Reply #110 on: June 02, 2009, 03:00:36 pm »
i got 29....but then the radius is deff 0.15 and it asked how many stomata in 1 mm2, so the ratio is;       29:0.07 therefore to get 1 mm2, divide 29 by 0.07, so the answer i think was 114 or something.
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Offline dcgs

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Re: BIOLOGY P32 DISCUSSION ONLY ( AS LEVEL )
« Reply #111 on: June 02, 2009, 03:06:18 pm »
By the way sorry the 0.07 is the area. 3.14 X (0.15)2 is 0.07. its the area
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Offline lys90

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Re: BIOLOGY P32 DISCUSSION ONLY ( AS LEVEL )
« Reply #112 on: June 02, 2009, 03:10:05 pm »
i think somehow missed out the x40 for the area of the field of view, and the stomata was x100. so u have to take the ratio, [(3.14)(0.15x0.15)/40] x 100=158.5

should be lo...........
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Offline musicfreak

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Re: BIOLOGY P32 DISCUSSION ONLY ( AS LEVEL )
« Reply #113 on: June 02, 2009, 03:11:48 pm »
well u had to count the no of stomatas per mm2...so the no of stomata in the area of view were 28 but per mm2 was what??
i got 159 after calculation... did anyone else get that??
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Offline examfreak

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Re: BIOLOGY P32 DISCUSSION ONLY ( AS LEVEL )
« Reply #114 on: June 02, 2009, 03:13:19 pm »
0.07? no..i ddnt get anything like that...well...did we even need the graticule thingy? i ddnt need it at all:s the stage micrometer was 0.1 mm and the diameter was 3 micrometer divisions ..thus it was just...0.3 mm??
am i right?
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Offline examfreak

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Re: BIOLOGY P32 DISCUSSION ONLY ( AS LEVEL )
« Reply #115 on: June 02, 2009, 03:17:05 pm »
159? no..  i got like 369 stomata...:S
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Offline LupeFiasco

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Re: BIOLOGY P32 DISCUSSION ONLY ( AS LEVEL )
« Reply #116 on: June 02, 2009, 03:19:01 pm »
Quote from: musicfreak on June 02, 2009, 01:27:57 pm
i remember getting 159 stomata! did anyone else get that??

lol got 155 but still wrong, if u noticed the difference in magnification b/w the pics........the area of viewing pic was x40 while the other was x100.
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Offline pikutata

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Re: BIOLOGY P32 DISCUSSION ONLY ( AS LEVEL )
« Reply #117 on: June 02, 2009, 03:43:38 pm »
sh*t, i never count in the magnificiation. OH GAWD!! i think i get like 400++ stomata per mm.
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Offline examfreak

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Re: BIOLOGY P32 DISCUSSION ONLY ( AS LEVEL )
« Reply #118 on: June 02, 2009, 03:45:39 pm »
i dnt tink that u shud count in the magnification cz watever the magnification is ,the actual area is still the same...
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Offline dcgs

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Re: BIOLOGY P32 DISCUSSION ONLY ( AS LEVEL )
« Reply #119 on: June 02, 2009, 06:46:11 pm »
exactly, thats y u dont have to divide or multiply by the magnification and stuff. it gave you the actual area and the stomata picture used the same area.
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