Can anyone explain 7.3 on set 2 paper, about the tension. How did anyone get a tension of around 70N. I'm completely baffed
I had to look at the mark scheme for that question I could rearrange the equation but for some reason they divided the frequency by 3 to get 110Hz and I don't know why but that gets the answer.
I had to look at the mark scheme for that question I could rearrange the equation but for some reason they divided the frequency by 3 to get 110Hz and I don't know why but that gets the answer.
because the diagram is of the third harmonic, so you have to divide by 3 because that equation is only for the first harmonic (my teacher said that they wouldnt test us on anything but first harmonic but i guess he was wrong)
are proton-antineutrino and neutron-neutrino on the spec? because i've never seen those?
I thought that the were but maybe not im not too sure. Just in case Proton + antineutrino ------ neutron + positron Neutron + neutrino ------ proton + electron
I had to look at the mark scheme for that question I could rearrange the equation but for some reason they divided the frequency by 3 to get 110Hz and I don't know why but that gets the answer.
Thats because the frequency of third harmonic is triple such of the first harmonic. The eequation only works for first harmonic. How did you get the answerWhat was your working out?
Use the graph for that question part 2 the power 30w is because the highest voltage is 12V and the current then is 2.5A and 12×2.5=30 resistance for part 3 is 6(half of 12V which is the maximum voltage)÷1.9=3.2 ohms. Part 4 is describing the graph by using knowledge of temperature and resistance. Part 5 is about as in series the voltage will never be 0V or 12V as the variable resistor will take some of the voltage as it's not a potential divider circuit. Hope you understand the question better now.
Thats because the frequency of third harmonic is triple such of the first harmonic. The eequation only works for first harmonic. How did you get the answerWhat was your working out?
Ah okay I rearranged the new equation which came with this topic in the new specification. Working out isn't neat as I realised it was wrong at first so I had to change some values. (Only the middle to right is correct)
Finally found this thread! I agree with everyone, after having done all the old spec papers and redoing the new spec papers... the difference in difficulty is pretty big :/
Okay i'm new to this website and since i haven't found any other thread for the upcoming exams i'm gona just through my questions here.......i have attached an image below which is taken from a model answer sheet , can anyone please explain to me why the answer is C??...I find both C and D to have both vector and scalar quantities..!!!...what am i missing here?
Does any one know where I can find lots of questions on the specification. I have done all the past papers! Thanks
The app 'gojimo' is really helpful for quick last minute multiple choice questions. When you're choosing the subject you can make it specific to your exam board so it's relevant!
The app 'gojimo' is really helpful for quick last minute multiple choice questions. When you're choosing the subject you can make it specific to your exam board so it's relevant!
has anyone tried the specimen papers. I found them hard lol
Did the first paper and I got 60/70 :/ I wanna get at least 90% but if the actual paper is that hard... Not to mention I'm stronger on Paper 1 (more calculations). I'm tense now lol