Minji Kim Posted January 23, 2018 Report Share Posted January 23, 2018 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. Reply Link to post Share on other sites More sharing options...
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