Otago HSFY chat - archive

[Ruth]

Hey guys, Is the striped slides on the PCC stuff we don't need to know, like in thermo?

I thiiiiiink we needed to know the blue-striped ones but not the green-striped ones or something? but the slides on blackboard are in black and white so that's not very helpful sorry

Also [MENTION=12565]rawry[/MENTION] they put the lab times up on blackboard and it is next week

 

[Proshot]

He said that the slide with "Thermoregulation can be impaired in many ways. For example:" is the stuff he wanted us to know. I'm 99% sure that was a rather large hint as to what his question will be about this year.

I thiiiiiink we needed to know the blue-striped ones but not the green-striped ones or something? but the slides on blackboard are in black and white so that's not very helpful sorry


Thanks guys

 

[Sam]

Looks like CELS191 11am got cancelled, no power in quad.. lol. I always knew that place was a piece of ..
I guess we won't be examined on it.. I hope so.

 

[Profiterole]

Looks like CELS191 11am got cancelled, no power in quad.. lol. I always knew that place was a piece of ..
I guess we won't be examined on it.. I hope so.

Nah, the 11am stream has to listen to the pod-cast or jump to the 4pm stream

 

[Proshot]

Hey guys, could anyone possibly help me with this physics question:

A 90kg parachute jumper is falling towards the ground at a constant speed of 30km/h. Which of the following statements is FLASE?

A)The upward air resistance on the jumper and parachute is 900N
B)the jumper will hit the ground at 8.3m/s
C)If the jumper comes uniformly to rest in a vertical distance of 0.83m, his deceleration will be 83m/s^-2
D)Air resistance is the reaction force from the air in front of the jumper which he is accelerating out of his way as he falls
E)Before the jumper reaches terminal velocity the air resistance can be much less than 900N

 

[SeeKay]

Answer should be C

Use v^2=u^2+2as, where v is final velocity, u the initial velocity, a the acceleration/deceleration, and s the distance.

You'll see that the deceleration is not 83ms^-2 but 41.8ms^-2

 

[Proshot]

Thanks mate, I totally forgot that equation existed

 

[Proshot]

By the way greenglacier (i don't know where your post went)

At the time I thought each one was possible,
A - due to terminal velocity as velocity is constant
B - By converting 30km/h into m/s was right
C - given velocity and distance, calculated time (0.0996s) and used to find acceleration = 83.7 m/s^-2
D - That's pretty much air resistance
E - Before terminal velocity, the upwards force doesn't equal weight force (as less) hence <900N

Though thanks to SeeKay, it turns out C was wrong

 

[greenglacier]

By the way greenglacier (i don't know where your post went)

At the time I thought each one was possible,
A - due to terminal velocity as velocity is constant
B - By converting 30km/h into m/s was right
C - given velocity and distance, calculated time (0.0996s) and used to find acceleration = 83.7 m/s^-2
D - That's pretty much air resistance
E - Before terminal velocity, the upwards force doesn't equal weight force (as less) hence <900N

Though thanks to SeeKay, it turns out C was wrong

OK, sounds like you had a pretty good idea what was happening

[offtopic](I deleted my last post after seeing the question had already been answered - don't worry)[/offtopic]

 

[Sam]

Goodluck with PHSI guys, remember that it doesn't matter too much seeing as plussage applies

 

[Sam]

Heh, some of those questions in the terms test were weird! I think I ended up with most of them correct... Maybe 17/20.. Hm, much harder than last years.

 

[hermafish]

I think it went pretty well, had enough time to check everything although there were a couple questions I wan't totally sure on. Fingers crossed!

 

[Profiterole]

I think it went pretty well, had enough time to check everything although there were a couple questions I wan't totally sure on. Fingers crossed!

lol yea, thank goodness for multi-choice!

does anyone recall the lecturer's/slides saying that EM waves travel at the speed of light?

 

[Sam]

lol, looking back I completely durped an easy question. So annoying >_>. Oh well, not like this exam even matters haha. Plussage ftw!

 

[Kception]

Heh, some of those questions in the terms test were weird! I think I ended up with most of them correct... Maybe 17/20.. Hm, much harder than last years.

Yeah I have to agree - perhaps it was made tougher due to the 2011 mid semester being somewhat easier - I think I'm in the same boat as you - with around 17/20 - thank god for plussage

 

[Sam]

Yeah I have to agree - perhaps it was made tougher due to the 2011 mid semester being somewhat easier - I think I'm in the same boat as you - with around 17/20 - thank god for plussage

I hate it when tests try and get you with really specific odd questions, lol. It's just dumb to assess on really obscure stuff while only having 1-2 thermo calculations.. I hate mid terms as well, not enough questions. At least with 55 a mark wrong here or there doesn't really matter all that much. In this test it was worth 5% -.-

 

[frootloop]

does anyone recall the lecturer's/slides saying that EM waves travel at the speed of light?

Light *is* an electromagnetic wave, so...

 

[Ruth]

I hate it when tests try and get you with really specific odd questions, lol. It's just dumb to asses on really obscure stuff while only having 1-2 thermo calculations.. I hate mid terms as well, not enough questions. At least with 55 a mark wrong here or there doesn't really matter all that much. In this test it was worth 5% -.-

5% of 18% though, so only 0.9% (although actually that's nearly a whole 1%...so YEAH PLUSSAGE)
Also I just spent like two minutes trying to figure out what 'dumb to asses' meant. Just so you know.

 

[Sam]

Light *is* an electromagnetic wave, so...

Yes well NOW we know that Oh well

 

[hermafish]

Is question 9 from the 2011 chem terms test something specific to ATP and the lecture we missed? Otherwise would some please explain the answer to me? Cheers