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Physics ECF - does this always apply in Paper 2?


Minji Kim

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Hello:)

I basically took a test for IB Physics HL today, on Topic 4: Waves - only paper 2. The problem is, that for the last question I mistook 0.882 ms for 0.882 s, which got me the answers 0.21Hz and 0.34m/s when the real answers were 210Hz and 340m/s. I had to get the frequency before the speed, but since I got the frequency wrong in the first place the speed was also wrong, although the working process was right. I thought that I would normally get at least 2 out of 4 marks, thanks to ECF. 

However, I just took a look at the mark scheme and it doesn't talk about any ECF on the notes section - will I still receive 2 marks or will I receive 0..?

 

Thanks in advance:)

For the files, the question is 4. b i and ii. 

Screen Shot 2018-01-23 at 7.19.32 PM.png

Screen Shot 2018-01-23 at 7.19.38 PM.png

Screen Shot 2018-01-23 at 7.19.45 PM.png

Screen Shot 2018-01-23 at 7.19.50 PM.png

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