Edexcel physics unit 6B (15 May 2014)

wait!

First you obtain x/10. So 803/10= 80.3. Then only you subtract. So the least d.p before subtracting is 80.3 which is to 1 dp.

Only a stop clock having a precision less than the reaction time is suitable. Suppose the stop clock had precision 0.5s. Then it wont be suitable as it is increasing the uncertainty. A suitable stop clock is one where the precision is less than the reaction time. So the uncertainty is the reaction time, which is the minimum value of the uncertainty when timing is involved.

Thank you. And whats the difference between a stop clock and a stop watch?

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Can anyone discuss with me for physics 6b answers. I finished my exam and since we r not allowed to discuss here can anyone private message me or post on my wall

Went really well for me and people from my batch. any ideas about the grade boundaries ?

Stop watch could be hand held but a stop clock isn't.

although the exam is over, but still got one more question.
For q3(b.) the mark scheme said that a graph of T^2 h against h^2 should me plotted. However, if h^2 is zero (to find the y intercept), shouldn't T^2 h becomes zero also, the value of constant C is zero?!

Thanks!

I just can't sleep without knowing whether my answers in the exam are correct������


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And I really want to know what is the value of k and calculated value of plank constant in the exam?


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k=1.2 X 10^(-18) .....and h=5.91 X 10^(-34)

at least got one question ryt,, yayyy xD
btw aren't we suppose to discuss nly aftr 12 hours? :O
nwy wt was the gradient of the graph? i had only 3 minutes to plot d graph n find the gradient..

0.0381......hey, what was the uncertainty percentage in question 1?