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#101 Re: Dark Discussions at Cafe Infinity » Bullying-reasons or whims? » 2007-02-22 00:40:04
That doesn't work all the time... personal experience -.-
Sometimes it does, but other times they will just cling to you for every question or assignment and you won't have any time for yourself...
#102 Help Me ! » Elementary Physics » 2007-02-21 22:27:10
- Toast
- Replies: 4
Assume friction = 0
A trolley of mass 2 kg travelling at 0.5ms-¹ collides with a stationary 1 kg trolley. The 2 kg trolley continues to move with a velocity of 0.1ms-¹ after the collision. What is the velocity of the 1 kg trolley?
What is the gravitational acceleration of a body of mass 10 kg on a planet where the gravitational field strength is 7N kg-¹?
I think for the second one I should do:
?And I'm clueless for the first.
#103 Re: Dark Discussions at Cafe Infinity » Bullying-reasons or whims? » 2007-02-21 22:14:36
I think workplace bullying is much worse... in school you may get verbally attacked or hit a bit, but regarding your future it's not really that much of a deal... in the workplace people have a lot more power to do things that can potentially kill your career.
However, shoolyard bullying is still stupid, and I think only about 1/10 of all incidents are ever noticed (or cared about) by teachers.
All the while teachers try to give the illusion of justice...
#104 Re: Dark Discussions at Cafe Infinity » Future job; what do you want to do? » 2007-02-21 06:13:32
Yeah I have to do it too, but at the start of Term 3... I dunno what to do =[
#105 Re: Euler Avenue » Factorials, Hyperfactorials and Superfactorials » 2007-02-20 19:12:02
In Knuth's upper arrow notation, how many powers do you raise n to?
#106 Re: This is Cool » pi » 2007-02-20 19:09:04
Yeah I think remembering the values of pi, e, root 2, and phi to at least 20 decimal places is a great thing to do. It's a good way to get in touch with numbers and practice your memory skills.
#107 Re: Dark Discussions at Cafe Infinity » Vegetarianism » 2007-02-20 19:04:54
I'm an omnivore but its terrible to think of where the meat comes. They treat the animals like objects, not lives. I try not to think about it though, "it's not something else's meat, it's just meat".
#108 Re: Puzzles and Games » Murder in the Saloon » 2007-02-20 02:16:31
#109 Re: Guestbook » Harry Potter » 2007-02-19 23:19:31
I've read a Star Wars parody called Star Bores. It is funny at first but then it gets really ... really... really lame. I mean even the title is unbelievably lame...
#110 Re: Dark Discussions at Cafe Infinity » Haikus » 2007-02-19 23:17:46
I'm confused, how does this Haiku thing work? I've tried to work it out by reading some of yours but posts are inconsistent with regards to the number of words and/or syllables in each lines.
Actually, I think we have some pretty good Haiku going on in the 'Person Above, Left, and Below" thread XD.
#111 Re: This is Cool » Interesting patterns regarding number sequences » 2007-02-19 20:46:45
I'll also post another conclusion I came to using the sequence in my Multiplication Squares problem:
(Discovered later)n:
1: 0
1
2: 1 2
3 1
3: 4 3
6 1
4: 10 4
10 1
5: 20 5
15
6: 35
As before, 10+6+3+1 = 20, 20+10+4+1 = 35 etc...
Let D_n = the number you want, evaluated by the formula
Hence, if you want to wanted to find what
would be, you would go#112 This is Cool » Interesting patterns regarding number sequences » 2007-02-19 20:03:01
- Toast
- Replies: 2
n(n-1)
n:
1: 0
2
2: 2 2
4
3: 6 2
6
4: 12 2
8
5: 20 2
10
6: 30 2
12
7: 42 2
14
8: 56 2
16
9: 72
The numbers in the second column represent the difference between the numbers in the first column. And the numbers in the third column for the second. What is interesting is that 6+4+2=12, 12+6+2=20, 20+8+2=30 etc. If you add the numbers diagonally up you will get the next number.
I find that if you keep finding the differences over and over again, then add them up diagonally, going upwards, you will get the next number in the sequence
Another example
n^3-n^2-n
n:
1: -1
3
2: 2 10
13 6
3: 15 16
29 6
4: 44 22
51 6
5: 95 28
79
6: 174
As you get to the last column the difference decrease until you get the same number. Now, 44+29+16+6=95 and 95+51+22+6=174. Interesting huh?
It kinda reminds me of finding the derivative of the derivative of a distance time graph to get acceleration.
Can anyone tell me why this works?
Thanks.
#113 Re: Guestbook » Harry Potter » 2007-02-19 07:32:04
The only other book out there that is similar (I think) is Barry Trotter, and I think it is a parody written after Harry Potter.
Wait I'm actually really confused, how did Rowling win the court case and what book did she allegedly copy?
#114 Re: Guestbook » Harry Potter » 2007-02-18 22:41:55
Hmmm, I remember once borrowing 'Northern Lights', but for some reason I never got to reading it, and returned it. Probably something I should look into again.
Just fyi I'm reading 'The Algebraist' by Iain M. Banks. And nope, it's not about maths, but I'm finding it incredibly difficult. There are examples in the book of sentences lasting around 10 lines. It's quite interesting however, as I'm very into sci-fi.
#115 Re: Help Me ! » Multiplication Tables » 2007-02-18 19:07:20
I tried using arithmetic progression on both. For the first summation it came out as 0. For the second I got
Geeze... Soooo close. Was I on the right track?
EDIT: I think it was supposed to be
well... maybe not that close, but maybe getting there...
#116 Re: Introductions » brian001 » 2007-02-18 18:50:12
Woops 
I meant brian001
#117 Re: Dark Discussions at Cafe Infinity » Happy Valentine's » 2007-02-18 18:49:03
At our school library the librarians were giving a chocolate to everyone who borrowed a book. It was a very tasty day.
#118 Re: Help Me ! » Multiplication Tables » 2007-02-18 00:03:38
So like:
Then what do I do?
#119 Re: Guestbook » sup » 2007-02-17 23:33:18
Count me in.
#120 Re: Guestbook » Maths » 2007-02-17 23:29:36
Sums are complicated things 
((
#121 Re: Guestbook » hi peoplez » 2007-02-17 23:27:38
Year 13? 
#122 Re: Help Me ! » Multiplication Tables » 2007-02-17 17:07:59
So... is there actually a method, or do I have to use a calculator?
#123 Re: Guestbook » Harry Potter » 2007-02-17 17:06:43
I've read it but it doesn't stand out to me as a great book.
#124 Re: Jokes » the fishies! AAAAAAAAAAA SUCH A CUTE STORY! » 2007-02-17 14:26:18
(o_o) Q(o_oQ)
-----------------------------------------------
(o_O) Q(o_oQ)
-----------------------------------------------
(O_O)
O-----(o_oQ)
-----------------------------------------------
(O_O)
O--(o_oQ)
-----------------------------------------------
o__(O_O)
-----------------------------------------------
o_______ (^_^)
-----------------------------------------------
o_______ (^_
GROUND POUND!
#125 Re: Dark Discussions at Cafe Infinity » GONG HAI FAT CHOI!(early of course) » 2007-02-17 14:18:08
Cool, I rang my relatives in china last night... ...YUM-CHA TIME!