biology practical

[Dukeofwin]

Ohh no, the magnification was x400, i double checked that, 22ooo/54 so it was x400.
Dont worry, pray that the threshold falls down so that everyone scores well Inshaa Allah

Well magnification actually depends on how large you draw the diagram and apparently the least you could enlarge it was upto x200 so yeah anything between x200 and x400 HAS to be CORRECT

 

[redd]

Well magnification actually depends on how large you draw the diagram and apparently the least you could enlarge it was upto x200 so yeah anything between x200 and x400 HAS to be CORRECT

No its not in this case, we were given the actual and image so we had to deduce the mag from them, it was quite very simple, measure that length that read 54 micrometer, it was 22 mm =22000 micrometer, so
mag=image/actual
22000/54
x407
~x400

 

[Dukeofwin]

No its not in this case, we were given the actual and image so we had to deduce the mag from them, it was quite very simple, measure that length that read 54 micrometer, it was 22 mm =22000 micrometer, so
mag=image/actual
22000/54
x407
~x400

If that's how it should've been done then I have screwed it!

 

[redd]

If that's how it should've been done then I have screwed it!

Well brother, i'm quite sure on my part, Rest Allah knows best! May He help us all. Ameen.

 

[Haris123]

Magnification was x407 it was 22mm=54um(microns)
So 22=22*1000=22000/54= 407.4 but it needs to be 3 sig fig x407

I took 2.1 cm. Would there be compulsion?

 

[Haris123]

Ohh no, the magnification was x400, i double checked that, 22ooo/54 so it was x400.
Dont worry, pray that the threshold falls down so that everyone scores well Inshaa Allah

Took 2.1 cm instead of 2.2. Will I lose marks?

 

[redd]

Took 2.1 cm instead of 2.2. Will I lose marks?

Well brother, i cant say anything here, Let's pray it doesnt. Inshaa Allah

 

[princessnoor]

Ohh no, the magnification was x400, i double checked that, 22ooo/54 so it was x400.
Dont worry, pray that the threshold falls down so that everyone scores well Inshaa Allah

Ameen

 

[princessnoor]

No its not in this case, we were given the actual and image so we had to deduce the mag from them, it was quite very simple, measure that length that read 54 micrometer, it was 22 mm =22000 micrometer, so
mag=image/actual
22000/54
x407
~x400

I got x407 but in the answer i didnt wrote x400 so means i lise marks right?

 

[Rohan O]

Took 2.1 cm instead of 2.2. Will I lose marks?

Depends on the range I guess the range will lie from 21-23mm so you might get full marks, if not one mark will be deducted!(my opinion)

 

[Rohan O]

I got x407 but in the answer i didnt wrote x400 so means i lise marks right?

I guess yes because there wouldn't have been a 4 mark easy magnification question tbh. 1 mark must be for the significant figures so your answer x400 =1sf that might deduct one mark but depends entirely upon the marking scheme.

 

[Rohan O]

No its not in this case, we were given the actual and image so we had to deduce the mag from them, it was quite very simple, measure that length that read 54 micrometer, it was 22 mm =22000 micrometer, so
mag=image/actual
22000/54
x407
~x400

And brother all values if not stated has to be in 3 sig fig so x407.4 ~x407

 

[redd]

And brother all values if not stated has to be in 3 sig fig so x407.4 ~x407

well, sister
And yeh right.

 

[redd]

I got x407 but in the answer i didnt wrote x400 so means i lise marks right?

Errrmm cant say anything, but we have to round it to the nearest whole.

 

[Minion96]

Ohh no, the magnification was x400, i double checked that, 22ooo/54 so it was x400.
Dont worry, pray that the threshold falls down so that everyone scores well Inshaa Allah

Inshaa Allah, May u Get all high A's in ur As inshaa Allah

 

[Rohan O]

well, sister
And yeh right.

Oh you're a girl?

 

[happyperson]

What was the question?

It was asking about the volume of iodine if conc. of ascorbic acid is 0.0001, something of this sort, the very last part of question no. 1

 

[Snowysangel]

It was asking about the volume of iodine if conc. of ascorbic acid is 0.0001, something of this sort, the very last part of question no. 1

Add cm3 of iodine to get a 100% validity test for starch...or something along those lines

 

[princessnoor]

I guess yes because there wouldn't have been a 4 mark easy magnification question tbh. 1 mark must be for the significant figures so your answer x400 =1sf that might deduct one mark but depends entirely upon the marking scheme.

 

[happyperson]

Add cm3 of iodine to get a 100% validity test for starch...or something along those lines

I wrote that add 3cm^3 or slight more iodine as it had been interpreted by the graph. Is it fine?