hey well the practical is tomorrow and i know for a fact that the oscillation is coming up but what typical problems and solutions can you put in the evaluation oh and if you have any more tips about the practical feel free to blurt it all out lol
Capacitors ???????????? Our teacher made a work sheet based on the real thing which had micrometers and oscillation i asked him wats the point of doing this sheet and he said he had a look he also said on the apparatus list that a stop watch will be used and that the only experiment in physics for a2 that invoves a stopwatch is the ocillations
That's strange as in my mock we used a stop watch and the first experiment involved Capacitor discharge, and the second was oscillations. If I remember correctly it was last years paper... I doubt it will be the same two years in a row.
Basically, things u need to know are- How to measure the period of an oscilation (like time it for 10 bounces then divide by 10) How to use a micrometer how to take natural logs of equations which is the hardest bit i think
remember: the practical consists of 2 experiments (1 short one and 1 long)... so maybe the first experiment is based on oscillation and the other on capacitors... just a thought...
hehe pretty nice, I got 1.10 mm for the slides, graph gradient = -0.0440 and intercept = 5.10, A was actually my V0 ie. 160 mV and B was 0.0440 The 50% thing was (ln 2/B) * (measurement of slide) - worked out around 17 for me. For the second question I said that T is proportional to root m, my two values of K were within 3% of one another.
Part 1- in the dark! Glass slides initial reading- 101.1 mV then went down to about 60mV with 12 slides on it then the log bit [4 marks]- Quite hard Graph- easy Gradient not too good, then the y intercept, i ended up drawing the line through the Y, i couldnt do the maths!
Part 2- Oscillations 0.6kg was about 0.9s i think and 0.3kg was about 0.6 from what i can remember! Sig Figs- wasnt too sure on this they said T was proportional to Sq.rt of M, so for this i put a constant in which gave T=k Sq.rtM so k=t/Sq.rtM plug values of T into these for 0.6 and 0.3 kg and they both came out at 1.67 whisch meant they were proportional
Evaluation [8 marks]- 1.Human error in releasing and starting the timer Solution- use a machine 2. Displacment of 4cm was hard to judge solution- use a ruler with a fiducial marker on the mass 3.Hard to time when oscillation finished Solution- Record the experiment on film and analyse afterward to get a proper value for T 4. Mass swings from side to side, affecting T
Thats pretty much what i did from what i can remember, anyone else have probs on the log bit??
well yeah it was an experiment where u could have said a 100 different bad things about it inspite of this, the values of K got pretty close to one another
well yeah it was an experiment where u could have said a 100 different bad things about it inspite of this, the values of K got pretty close to one another
really? mine was way off... the difference was something like 5... hmmm...