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physics paper 33

cHeStEr

cHeStEr

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omair tahir said:
Best of luck every1 :)
Do tell me how to calculate uncertainity
Click to expand...
percentage uncertainty = ( uncertainty / average value ) x 100
that is all i knw abt uncertainty thing....
hope this helped a bit though...

best of luck (y)
 
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7devilsallaround

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cHeStEr said:
ohhh thnxxxx!!!
2 more doubts plzzz!!!!
http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w11_qp_35.pdf
help me with question 2aiii please....
and
help me understand the concept of error calculation...
Click to expand...
Uhh im not too good with those but here's a try:
You found m by 50-0 right?
Then % uncertainty of m = ((0.05 x 2) / m ) x 100
For repeated readings, as in taking average values, uncertainty is half the least uncertainty of the apparatus used.
When multiplying or dividing quantities, add their % uncertainties together.
When adding or subtracting quantities, add their absolute errors together, then divide by the result of the addition/subtraction of the measurement.
If a measurement is to be raised to a power, then multiply the % uncertainty in the measurement by the power to get the % uncertainty in the overall term.
Err thats it I think ;o
 
cHeStEr

cHeStEr

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7devilsallaround said:
Uhh im not too good with those but here's a try:
You found m by 50-0 right?
Then % uncertainty of m = ((0.05 x 2) / m ) x 100
For repeated readings, as in taking average values, uncertainty is half the least uncertainty of the apparatus used.
When multiplying or dividing quantities, add their % uncertainties together.
When adding or subtracting quantities, add their absolute errors together, then divide by the result of the addition/subtraction of the measurement.
If a measurement is to be raised to a power, then multiply the % uncertainty in the measurement by the power to get the % uncertainty in the overall term.
Err thats it I think ;o
Click to expand...
ok so.......1st part i got it ........ and the second part i still didnt get it to be honest*
what do you mean by adding / subtracting / multiplying /dividng quantities ?
can you explain it to me with an example cz im still not sure whether i hv that thing correctly in my mind.
 
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7devilsallaround

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cHeStEr said:
ok so.......1st part i got it ........ and the second part i still didnt get it to be honest*
what do you mean by adding / subtracting / multiplying /dividng quantities ?
can you explain it to me with an example cz im still not sure whether i hv that thing correctly in my mind.
Click to expand...
Suppose you have 2 values a & b, we're taking about adding/subtracting/whatever those 2 values. Got it now?
 
cHeStEr

cHeStEr

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7devilsallaround said:
Suppose you have 2 values a & b, we're taking about adding/subtracting/whatever those 2 values. Got it now?
Click to expand...
i think so ... actually i was taught a method now i dont remember it properly .... something delta x / x + delta y / y
i m confused.:unsure:
 
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syairahhazira

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For angles the unit is degree right? But what if when it comes to sin theta or cos theta. will there still be any units?
 
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toxicdevil

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What was the gradient? Mine was -ve 4.xx. From my group only my gradient was negative :/
Does it matter if we use cm or m and kg or g?
 
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