Im not much of a Physics person but just found this definition of magnetic dipole: "A magnetic dipole is the limit of either a closed loop of electric current or a pair of poles as the dimensions of the source are reduced to zero while keeping the magnetic moment constant."
Im going to say the magnetic dipole is not 2 since the average of those values is 2.000 0012
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Not sure if there are any IB markers in here but I came across a question like this tonight, which is equivalent to a Band 5 HSC question:
'A circular disc is cut into twelve sectors whose angles are in an arithmetic sequence. The angle of the largest sector is twice the angle of the smallest sector. Find the size of the angle of the smallest sector.'
The answer was 20 degrees, I used the answer in radians which was
Would I get penalized if I left my answer in radians , even though it didn't specifically mention either?
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***Renaming this thread since it is 2017, and stickying it for easy access***
^^ Because part (a) is wrong, part (b) which follows is also wrong.
| B Eng (Hons) | IB Mathematics SL | IB Mathematics HL | Australian Cricket | Casual University Statistics Tutor
| B Eng (Hons) | IB Mathematics SL | IB Mathematics HL | Australian Cricket | Casual University Statistics Tutor
Also if anyone has an IB past exam papers or tests from their schools, it would be great if you could share it whether it be a school in NSW, Australia wide or internationally.
Cheers
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There are 15 schools in NSW that offer the IB. I would be keen to know which Options, as part of the Maths HL. Would be keen to know which Options each of the 15 schools offer?
| B Eng (Hons) | IB Mathematics SL | IB Mathematics HL | Australian Cricket | Casual University Statistics Tutor
| B Eng (Hons) | IB Mathematics SL | IB Mathematics HL | Australian Cricket | Casual University Statistics Tutor
I guess my thinking is why wouldn't you have a sign for the worked example as well?
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| B Eng (Hons) | IB Mathematics SL | IB Mathematics HL | Australian Cricket | Casual University Statistics Tutor
Last edited by He-Mann; 13 Feb 2017 at 3:14 PM.
Well I tried subbing in Un=4882.8125, then tried Un=8215 both didn't get me the answer which was n=7/
This was my working out:
OK, I eventually got the answer, after going through it again.
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I came across this question today Question 3(i):
Here was my attempted working out:
I tried to visualize it in MATLAB when drawing it and I can see that the angles are all acute angles. Just a bit confused why my calculations work out to be 105.5 degrees? (I understand that the 3rd angle should be 74.5 degrees as the answer)
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That's the standard 1st year University level Linear Algebra question. I wouldn't have got that right if that had come up in an exam or test paper if they required working out. I learnt something new today.
If I could maybe break it into simpler words, I would have looked at the directions of the vectors and then factored into account the angles of the two vectors which they lie between.
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^^ Building on from what I have said, if the vectors are meeting in opposite directions, I need to reverse one of them so that either they meet together or leaving the same point at the one time.
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