AQA A Level Physics Paper 3 7408/3 - 16 Jun 2022 [Exam Chat]

wasn't y inversely proportional to m? therefore you can say y= k/m. to find the constant k you do y x m. Do that for each data point and you can find the constant for each data point. If k is not equal for all values then it is not inversely proportional

i think you're right 2 marks lost again sick

Reply 1061

reenauppal

5

Original post by arjun990

wasn't y inversely proportional to m? therefore you can say y= k/m. to find the constant k you do y x m. Do that for each data point and you can find the constant for each data point. If k is not equal for all values then it is not inversely proportional

I did 1/k = m, where m is the gradient and I found the gradient twice using different points. does that work too?

Reply 1062

Dejithefat

8

Original post by abdul 580

what did you write for that 2 marker about y not being inversely proportional to the mass i just found the gradient and drew a line of best fit on the graph

Take two coordinates. Inverse promotional means something =k/something else. Work out K for point on the graph . Work out K for another point. K wasn’t constant for both points. Therefore not inversely proportional

Reply 1063

arjun990

6

Original post by reenauppal

I did 1/k = m, where m is the gradient and I found the gradient twice using different points. does that work too?

I'm not sure sorry, pretty sure my method is correct but just not sure about yours

Reply 1064

reenauppal

5

Original post by arjun990

I'm not sure sorry, pretty sure my method is correct but just not sure about yours

Yhh idk either bc I had like 5 mins left and realised I read it as directly proportional so I panicked and did the reciprocal of both the gradients I found 😭😭

Reply 1065

abdul 580

11

guys what do you think the grade boundaries will be for section A

Reply 1066

kconcepts2

11

boys for the question on naming one thing that has to be kept constant in the Boyle's law experiment would I get a mark if I said it has to be a fixed mass of air and can be achieved through conducting the experiment in a sealed container. Some people have told me that I would get 2 marks but others have told me that only the temperature is kept constant. Do you think I would get the marks for this question?

Reply 1067

cata03

12

Original post by maxcovel39

boys for the question on naming one thing that has to be kept constant in the Boyle's law experiment would I get a mark if I said it has to be a fixed mass of air and can be achieved through conducting the experiment in a sealed container. Some people have told me that I would get 2 marks but others have told me that only the temperature is kept constant. Do you think I would get the marks for this question?

Hmm I think it depends on whether it said that the apparatus was airtight/contained a fixed mass in question. I think they were looking for the temperature argument but the mass of air would need to be constant too, you're right

Reply 1068

Onesinsomnia

1

obviously no one knows exactly, but recently the telegraph said that the gcse and a level grades will be the most generous, so that's the only thing keeping me going. I think I got around 160 (fumbled big time), and I need an A and if its the most generous this year, hopefully its similar to last year, or less, and I highly doubt it'll be like 2019 so there's still hope.

Original post by abdul 580

guys what do you think the grade boundaries will be for section A