Hi guys for the question of measuring the speed of sound instead of banging gongs i wrote "banging bongs", will the examiner understand what i meant, however i wrote an alternative method could be clapping
Hi guys for the question of measuring the speed of sound instead of banging gongs i wrote "banging bongs", will the examiner understand what i meant, however i wrote an alternative method could be clapping
The official way to do it in the syllabus is with an oscilloscope that has two microphones, measure te time it takes for second line to appear. HOWEVER, due to them no actually saying that an oscilloscope was present they are likely to offer many alternate experiments. Mark scheme will say award marks for set up, what to do, how to measure and then making fair test, reliability and relying for wind speed etc.
The official way to do it in the syllabus is with an oscilloscope that has two microphones, measure te time it takes for second line to appear. HOWEVER, due to them no actually saying that an oscilloscope was present they are likely to offer many alternate experiments. Mark scheme will say award marks for set up, what to do, how to measure and then making fair test, reliability and relying for wind speed etc.
Do you think the grade boundaries will be low or high
The paper went good overall but the last question,the hard drive question and the kitchen hazards question were tough, very confusing and very time consuming. I didn't get time to check my paper at the end. Does anyone have the solution for these questions
Well the volume of the balloon was 2800 metres cubed and the density was 0.95kg/m3 so if density=mass/volume, then mass=density x volume...therefore if the volume is already in metres cubed there is no need for any conversions beforehand...so 2800 x 0.95 = 2660kg.
So one of the questions included "define half life" (2 marks) I put "the time it takes for the radioactivity of the radioactive material to half"... would you say that makes sense and would it be able to gain the 2 marks?
So one of the questions included "define half life" (2 marks) I put "the time it takes for the radioactivity of the radioactive material to half"... would you say that makes sense and would it be able to gain the 2 marks?
Yes, unless the examiner was very harsh or can't be bothered to properly read your answer, its clear that you mean the radioactivity levels/emission . You didn't make the mistake of simply saying the time it takes for the mass to halve.
Yes, unless the examiner was very harsh or can't be bothered to properly read your answer, its clear that you mean the radioactivity levels/emission . You didn't make the mistake of simply saying the time it takes for the mass to halve.
Yes, unless the examiner was very harsh or can't be bothered to properly read your answer, its clear that you mean the radioactivity levels/emission . You didn't make the mistake of simply saying the time it takes for the mass to halve.