Engineering Thread

TheAmateur · 10-02-2009 05:49PM

Baza210 wrote: »

Ok, thanks. Any idea why our exam in March is denoted as 1E2?

Oh yeah. He said that it was just another name, but that the exam in march will only test stuff from this term. Then he laughed and said that to understand things from this term you'd probably have to understand last term anyway.

Jonathan · 14-02-2009 05:37PM

I had forgotten how good Portal is.

The cake is a lie.

Brian · 14-02-2009 07:47PM

Apparently there's sinh and cosh on wiley, which we haven't covered =/

mathew · 14-02-2009 09:18PM

theyre grand.. differentiating and integrating them is in the tables book...
theyre the same as sin and cos.. Signs are slightly different I think..
If you need to do manipulations it might be helpful to know:
sinh(x) = (e^x - e^-x)/2
cosh(x) = (e^x + e^-x)/2
Those two formulae are also in the tables book, at the bottom of the tables for sinh and cosh respectivly.

They points (sinh(x), cosh(x)) form the right half of an equilateral hyperbola the same was as the points (sin(x), cos(x)) form a unit circle
More here

Thats about the extent of what you need to know IIRC

desertstorm · 15-02-2009 03:47AM

we have covered sinh and cosh!

Brian · 15-02-2009 11:50AM

We.. have.. ?

devinejay · 16-02-2009 10:23AM

We.. have.. ?

Indeed we did, don't worry though. I often think we've done something we haven't or vice versa. It's something to do with sleeping in lectures I think.

Brian · 16-02-2009 07:23PM

I think it's something do do with sleeping in Tuesdays.

Jonathan · 16-02-2009 07:53PM

Baza210 wrote: »

I think it's something do do with sleeping in Tuesdays.

How could you. Have you never wondered about catenaries?

Brian · 16-02-2009 07:58PM

Nope, I'm not a civil engineer.

devinejay · 16-02-2009 08:59PM

But you never know when you're gonna want to build the tallest monument in the US, go Gaudi on it and use hyperbolic functions for arches in a house or even if you wanted to know how make the anchors on your ship more resistant to dragging. Of course if you did want to know all of that then tuesday morning is not the place to find it out, just trusty ol' wikipedia.

Brian · 16-02-2009 09:07PM

I wonder if peritrochoid chambers use hyperbolas..

devinejay · 16-02-2009 09:11PM

Baza210 wrote: »

I wonder if peritrochoid chambers use hyperbolas..

You and your wankels....

Brian · 16-02-2009 09:53PM

Experiments I have done in the last 10 minutes:
Put green tea bag in pot of boiling water with noodles.

devinejay · 16-02-2009 10:15PM

Result?

Brian · 16-02-2009 10:39PM

Smelled a bit funny, tasted fine with Thai sweet chili sauce.

To be honest, all I'm hoping it'll do is by osmosis give me some goodness in my meal and cancel out the badness of the MSG aka instant noodles I ate earlier and intend to eat many more of in the future.

Also, I got a Maths question (s8.1 q19) out. Woot.

mathew · 17-02-2009 12:15AM

Baza210 wrote: »

Smelled a bit funny, tasted fine with Thai sweet chili sauce.

To be honest, all I'm hoping it'll do is by osmosis give me some goodness in my meal and cancel out the badness of the MSG aka instant noodles I ate earlier and intend to eat many more of in the future.

Also, I got a Maths question (s8.1 q19) out. Woot.

Was that the cosh and sinh one?

Brian · 17-02-2009 12:20AM

Nah, it was a d(e^f(x))/dx kinda one. Probably pretty easy.

Peleus · 18-02-2009 01:18AM

Just wrote yet another perfect C++ program.

anyone want a numer converted into roman numerals?

Brian · 18-02-2009 01:26AM

Ahem. I dun't say nuthin.

Jonathan · 18-02-2009 01:37AM

How about you convert 115 116 102 117 to roman numerals.

Then when you are finished that, write a program to convert from decimal numbers to ascii.

Then convert the same input numbers and see what output you get.

Peleus · 18-02-2009 05:48PM

what's ascii?

Boston · 18-02-2009 06:40PM

http://en.wikipedia.org/wiki/ASCII

............................................______ __
....................................,.-‘”...................``~.,
.............................,.-”...................................“-.,
.........................,/...............................................”:,
.....................,?........................... ...........................,
.................../.................................................. .........,}
................./.................................................. ....,:`^`..}
.............../.................................................. .,:”........./
..............?.....__............................ .............:`.........../
............./__.(.....“~-,_..............................,:`........../
.........../(_....”~,_........“~,_....................,:`..... ..._/
..........{.._$;_......”=,_.......“-,_.......,.-~-,},.~”;/....}
...........((.....*~_.......”=-._......“;,,./`..../”............../
...,,,___.`~,......“~.,....................`..... }............../
............(....`=-,,.......`........................(......;_,,-”
............/.`~,......`-...................................../
.............`~.*-,.....................................|,./.....,__
,,_..........}.>-._...................................|........... ...`=~-,
.....`=~-,__......`,.................................
...................`=~-,,.,...............................
................................`:,,.............. .............`..............__
.....................................`=-,...................,%`>--==``
........................................_........ ..._,-%.......`

Brian · 18-02-2009 07:05PM

Seems Peleus has never encountered the Internet Hate Machine.

Boston · 18-02-2009 07:14PM

I know you have Baza.

mathew · 18-02-2009 08:18PM

jmccrohan wrote: »

How about you convert 115 116 102 117 to roman numerals.

Then when you are finished that, write a program to convert from decimal numbers to ascii.

Then convert the same input numbers and see what output you get.

Does that actually come up with something funny or are you just wasting his time..
I'm assuming its time wasting since you cant go from decimal to ascii..

Harder program to write is to go from roman numerals back to integers.. Give that a go!! :-)

TheAmateur · 18-02-2009 08:23PM

Baza210 wrote: »

Seems Peleus has never encountered the Internet Hate Machine.

I hear life's better this way... no goatse...

Jonathan · 18-02-2009 09:00PM

mathew wrote: »

I'm assuming its time wasting since you cant go from decimal to ascii..

Ehhh yea you can...

Boston · 18-02-2009 09:21PM

What made you think you couldn't go from ascii to decimal? An ascii character is just a number.

mathew · 19-02-2009 12:35AM

jmccrohan wrote: »

Ehhh yea you can...

Sorry I thought you meant decimal numbers as in 2.45346, not decimal as in the number system...

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