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Leaving Cert 2012-13 *OFF-TOPIC* (hideaway) thread
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11Charlie11 wrote: »Perfect combination
The word "combination" always reminds me of one of my favourite Eurovision songs ever!
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Found This Fork Sir wrote: »It's depressing to hear that everyone is finishing up, I have a whole other week after midterm :O Today's exams were also quite sad, I hate tape tests with an unrivaled passion :P
Normally I love a good tape test
but we have our pres in one big large hall (the actual LC are in normal classrooms for us) so they put the tape player behind me and I found it incredibly hard to get used to it, I couldn't my finger on why but it just put me off, I did really terrible in both consequently! 0 -
Eurovisionmad wrote: »Normally I love a good tape test but we have our pres in one big large hall (the actual LC are in normal classrooms for us) so they put the tape player behind me and I found it incredibly hard to get used to it, I couldn't my finger on why but it just put me off, I did really terrible in both consequently!
Normally the Irish ones are okay, but today I just couldn't seem to get my head around the Irish or the French one, it was a bloodbath
Thankfully the written parts went well though :cool: 0 -
Found This Fork Sir wrote: »Normally the Irish ones are okay, but today I just couldn't seem to get my head around the Irish or the French one, it was a bloodbath Thankfully the written parts went well though :cool:
I just think two times for Irish is just unfair, like you could just genuinely be unlucky and miss a phrase!0 -
Eurovisionmad wrote: »I just think two times for Irish is just unfair, like you could just genuinely be unlucky and miss a phrase!
I agree, it's so easy to miss something because you're trying to answer the other questions
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SO VERY TRUE In Spanish for JC my teacher used to pause the tape every so often so you could finish writing the answer so so so so much better than how it's really doneFound This Fork Sir wrote: »
I agree, it's so easy to miss something because you're trying to answer the other questions0 -
Freedom at last.
Although I'm actually going to have to do some study over the midterm because during our geography exam the teacher came around with a revision plan that we have to do over the week......and there was me planning on taking it fairly handy.
I would have to papercut my little finger when opening the first page of my exam aswell wouldn't I?! Seriously painful for the first 2 pages of my biome question, right on the bend so it was. Only I would.
Even though the mocks didn't actually go too badly all things considered, thank god they're over.0 -
Finished.
My god that Irish tape was horrible, seriously don't know if I even managed 2/10%. But I don't care. 
Not going to put too much pressure on myself this week. I think I'm just going to focus on the orals and my music practicals, kind've neglected them recently (sraith pictiuirs :eek:).
Roll on tomorrow night. 0 -
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Finally finished the moccckkksss
Seriously need to start back doing HPAT drills and exams now!
Did anyone find the irish tape FLEW? The first part had finished before I properly started listening to the bloody thing
When it finished everyone was looking around and I'm pretty sure someone said 'What f*cking language was that?" 0 -
Could someone help me with this, I've been going through the sample 2013 Maths papers and Question 9 in Paper 2 has me stumped :pac: The one with the regular tetrahedron in a cylinder. I just can't figure it out, would really appreciate if someone could explain it to me
http://www.examinations.ie/schools/LCEV2013/Project_Maths_Phase_2_P2_Higher_Level.pdf0 -
This is hard to explain. so i'll try steps you need to get a value for r the radius and h the height of the cylinder in terms of aCould someone help me with this, I've been going through the sample 2013 Maths papers and Question 9 in Paper 2 has me stumped :pac: The one with the regular tetrahedron in a cylinder. I just can't figure it out, would really appreciate if someone could explain it to me
http://www.examinations.ie/schools/LCEV2013/Project_Maths_Phase_2_P2_Higher_Level.pdf
1. That black dot in the centre is the centre of the circular base of the cylinder, firstly you need to look at the base of the tetrahedron, this is an equilateral triangle. split this us into 3 smaller triangles by connecting the centre of the circle to each corner of the triangle. Take one of these smaller triangles you have just created. its an isosles triangle, of base 2a( given in the question that all sides of tetrahedron are 2a) base angles are 30 degrees (because you bisected the equilateral triangle) the other angle is 120, and the two sides of length r. Use the sine rule to get a value for r, this works out to be 2a/root 3
2. Now we need to look at the height of the cylinder
drop a perpendicular down from the top of the tetrahedron to that black circle centre on the base. With the lines on the base representing r from earlier You will now have created a right angle triangle. of hypotenuse 2a, base r and height h, since you know r, find h using Pythagoras, this works out to be (a(root 8)/root 3 )
3. Volume of a cylinder is pi(r^2)(h)
so subbing your values in pi( 2a/root 3)^2 (a(root 8)/root 3 )
pi(a(root 8)/root 3 )( 4a^2/3), keep multiplying out, you'll get pi (4a^3 root 8 / 3root3) put this fraction in your calculator( leaving out the pi and a^3, you put them back in the end) and it will simplify it for you down to 8 root 6/ 9 pi a^3
Hope that made sense0 -
YoursSincerely wrote: »This is hard to explain. so i'll try steps you need to get a value for r the radius and h the height of the cylinder in terms of a
1. That black dot in the centre is the centre of the circular base of the cylinder, firstly you need to look at the base of the tetrahedron, this is an equilateral triangle. split this us into 3 smaller triangles by connecting the centre of the circle to each corner of the triangle. Take one of these smaller triangles you have just created. its an isosles triangle, of base 2a( given in the question that all sides of tetrahedron are 2a) base angles are 30 degrees (because you bisected the equilateral triangle) the other angle is 120, and the two sides of length r. Use the sine rule to get a value for r, this works out to be 2a/root 3
2. Now we need to look at the height of the cylinder
drop a perpendicular down from the top of the tetrahedron to that black circle centre on the base. With the lines on the base representing r from earlier You will now have created a right angle triangle. of hypotenuse 2a, base r and height h, since you know r, find h using Pythagoras, this works out to be (a(root 8)/root 3 )
3. Volume of a cylinder is pi(r^2)(h)
so subbing your values in pi( 2a/root 3)^2 (a(root 8)/root 3 )
pi(a(root 8)/root 3 )( 4a^2/3), keep multiplying out, you'll get pi (4a^3 root 8 / 3root3) put this fraction in your calculator( leaving out the pi and a^3, you put them back in the end) and it will simplify it for you down to 8 root 6/ 9 pi a^3
Hope that made sense
Thanks, way easier to understand done out step by step like that Found the sample paper straightforward enough, but that was a fairly tricky one. 0 -
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