THANKS LOADS BRO!1) for the Refractive index, we all have different answers because each one drew a line of diffrent size (almost), so minimum differences could lead to different anwsers, marking scheme will have range !
2) Line conditions: straight and passes through origin
3)the spirit level question, i wrote it adds extra weight so the ruler may tilt
4) The reading of cylinder was 70, and each sphere is 0.53 cm^3
5) I wrote Distance against F .. correct or no?
6) i wote for the unexact result= because of different starting hot/cold water temperature and different room temp.