The Student Room Group
Uni students - Complete our survey >>
Uni students - Complete our survey >>
Uni students - Complete our survey >>

Number of SF [OCR Physics B]

Front of papers say an appropriate number, the internet says an appropriate number, TSR says an appropriate number (all meaning the same sf of the least accurate given in the question)

But I just came accross a past paper where the data is 2 sf and the answer asks specifically for an extra digit. Am I being crazy? Should I just put 3sf in my exam and scrap the accuracy mark?

Question 4:
QP:
http://www.ocr.org.uk/Images/63488-question-paper-unit-g494-rise-and-fall-of-the-clockwork-universe.pdf

MS:
http://www.ocr.org.uk/Images/59853-mark-scheme-january.pdf
Reply 1
Avatar for nerak99
nerak99
13
The data is not just 2. It is 2.0 which is 2 sf. The answer then just needs to be worked through and the conclusion is your answer is about 1.3
Original post by nerak99
The data is not just 2. It is 2.0 which is 2 sf. The answer then just needs to be worked through and the conclusion is your answer is about 1.3


That doesn't really answer my question...

I wrote 1.3 as the answer but the mark scheme says that 1.34 is necessary. I was asking why the 1.34 is necessary.
3 significant figures always, unless it says appropriate amount in the question, which means use the same amount of sf that the information given to you in the question had. does that make sense?
Reply 4
Avatar for oinkk
oinkk
3
Original post by zackdove
That doesn't really answer my question...

I wrote 1.3 as the answer but the mark scheme says that 1.34 is necessary. I was asking why the 1.34 is necessary.


Always give to the accuracy in the question.

However, my understanding here is that they're requiring 1.34 to show that it rounds down to 1.3 and not up to 1.4.
Original post by oinkk
Always give to the accuracy in the question.

However, my understanding here is that they're requiring 1.34 to show that it rounds down to 1.3 and not up to 1.4.


Ah okay brilliant! Makes sense (kinda) now, cheers
Reply 6
Avatar for oinkk
oinkk
3
Original post by zackdove
Ah okay brilliant! Makes sense (kinda) now, cheers


No worries!
What do you mean? Past papers?
Only thing I have is the past papers from here: http://physics.taskermilward.org.uk/KS5/past_papers/
Other than that I have no clue, sorry

Quick Reply

Related discussions

Latest

Trending

Trending

Articles for you