Year 11 2014 Chat :) (1 Viewer)

Audranda · Feb 6, 2014

Conquering Chemistry

Myrdred · Feb 6, 2014

Chemistry Pathways. Anyone doing Identity for their AoS?

strawberrye · Feb 6, 2014

Myrdred said:
Chemistry Pathways. Anyone doing Identity for their AoS?

Who is the author of Chemistry Pathways-I think this is the first time I've heard of this chemistry textbook.

Myrdred · Feb 6, 2014

strawberrye said:
Who is the author of Chemistry Pathways-I think this is the first time I've heard of this chemistry textbook.

Geoffrey Thickett, publisher is Macmillan

turnerloos · Feb 6, 2014

strawberrye said:
How come you only have 11 units in your signature for your preliminary subjects?

Cause 12 units is too mainstream.

jokes. I do catholic studies and dat doesnt count towards an atar so i didnt add it to my sig. (not sure if it was a bad idea to drop sor for catholic studies...)

justem · Feb 6, 2014

Night guys

thank god tomorrow is Friday

J280 · Feb 6, 2014

Guys I need help with a physics question (relative velocity)

Two trains are passing each other. Train A is moving east at 13 m/s, train B travelling west at 28 m/s.
a) What is the velocity of train A relative to train B?
b) What is the velocity of train B relative to train A?

Sorry I just don't get it :/

anomalousdecay · Feb 7, 2014

J280 said:
Guys I need help with a physics question (relative velocity)

Two trains are passing each other. Train A is moving east at 13 m/s, train B travelling west at 28 m/s.
a) What is the velocity of train A relative to train B?
b) What is the velocity of train B relative to train A?

Sorry I just don't get it :/

Put them into vector components, so that you set one direction as positive, one direction as negative.

So a) asks us to put it into relative terms of train B. So we assign the direction of train B as positive (west). Now since train A is moving east at 13 m/s, we can say that it is travelling -13 m/s west.

To find the velocity of train A relative to B, we must find the difference in velocity. So we do:

$v_{($A relative to B$)} = v_{A} - v_{B} \\ \\ \\ v_{($A relative to B$)} = -13 $ $m s^{-1} west - 28 $ $m s^{-1} west = -41 $ $m s^{-1} west \\ \\ \\ v_{($A relative to B$)} = 41 $ $m s^{-1} east$

Notice that to find the difference, you have to take away the velocity of one from the other.

Do b) and you should get this by using the same method:

$v_{($B relative to A$)} = 41 $ $m s^{-1} west$

J280 · Feb 7, 2014

anomalousdecay said:
Put them into vector components, so that you set one direction as positive, one direction as negative.

So a) asks us to put it into relative terms of train B. So we assign the direction of train B as positive (west). Now since train A is moving east at 13 m/s, we can say that it is travelling -13 m/s west.

To find the velocity of train A relative to B, we must find the difference in velocity. So we do:

$v_{($A relative to B$)} = v_{A} - v_{B} \\ \\ \\ v_{($A relative to B$)} = -13 $ $m s^{-1} west - 28 $ $m s^{-1} west = -41 $ $m s^{-1} west \\ \\ \\ v_{($A relative to B$)} = 41 $ $m s^{-1} east$

Notice that to find the difference, you have to take away the velocity of one from the other.

Do b) and you should get this by using the same method:

$v_{($B relative to A$)} = 41 $ $m s^{-1} west$

Thank you so much.. you are a lifesaver

Better get to sleep soon lol

justem · Feb 7, 2014

Morning people
I can barely keep my eyes open

hawkrider · Feb 7, 2014

justem said:
Morning people
I can barely keep my eyes open

Morning.

turnerloos · Feb 7, 2014

justem said:
Morning people
I can barely keep my eyes open

me too... im so fucking tired :/

strawberrye · Feb 7, 2014

turnerloos said:
me too... im so fucking tired :/

When did you slept last night?

hawkrider · Feb 7, 2014

So.... This weekend homework wise I have 2U, 3U maths textbook work, I need to finish an assignment for biology, got to do some practice tests on the symbols for chemistry, I have to do multiple choice questions and skills from the textbook for economics, and I need to compose a creative writing piece on my AOS.

If I'm done with all with those, I might make syllabus dot point notes for chemistry, biology and economics.

Man, the workload is piling up really fast.

turnerloos · Feb 7, 2014

strawberrye said:
When did you slept last night?

everyday i get about 7ish hours of sleep

studynerd · Feb 7, 2014

Has anyone started to make some meaning full notes for their mid term exam?

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hawkrider · Feb 7, 2014

studynerd said:
Has anyone started to make some meaning full notes for their mid term exam?

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Not yet, gonna start this weekend if I have time.

justem · Feb 7, 2014

studynerd said:
Has anyone started to make some meaning full notes for their mid term exam?

Sent from my GT-I9300 using Tapatalk

Yeah mostly on the weekends.
Weekend homework: 15 exercises for math , chem report, bio report, 5 bio worksheets, start English portfolio, 2 English adv analysis sons extension English research + notes
Fun

hawkrider · Feb 7, 2014

justem said:
Yeah mostly on the weekends.
Weekend homework: 15 exercises for math , chem report, bio report, 5 bio worksheets, start English portfolio, 2 English adv analysis sons extension English research + notes
Fun

:O crap, that's more than mine!

justem · Feb 7, 2014

hawkrider said:
:O crap, that's more than mine!

I know ughhhh

half of it is due Monday

Year 11 2014 Chat :) (1 Viewer)

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