PAT Solutions.

Hey - mind if I join in? :smile:

2008 - Q. 10.

Spoiler

Reply 183

2008 - Q. 11

a.)

Spoiler

b.)

Spoiler

Reply 184

Original post by mf2004

Sounds more likely to be Material sciences

I haven't seen the e-mail yet, could well be, but if that was the case I wouldn't bother. I was just wondering if anyone else had received something to that effect.

Reply 185

I have no idea how to spoiler stuff, but with regards to the question about the wind speed, I got fairly confused (and ended up not bothering with it) because surely the affect of the windspeed is dependent on the drag that it creates on the plane... some planes will be more aerodynamic than others so will be affected differently. I think I'll do the 2010 paper in a while, it looks like most of the solutions are on here as well! SWEET :smile:

(edited 12 years ago)

Reply 186

und

16

Original post by _Say_Goodbye_

I have no idea how to spoiler stuff, but with regards to the question about the wind speed, I got fairly confused (and ended up not bothering with it) because surely the affect of the windspeed is dependent on the drag that it creates on the plane... some planes will be more aerodynamic than others so will be affected differently. I think I'll do the 2010 paper in a while, it looks like most of the solutions are on here as well! SWEET :smile:

The air is moving relative to the ground, and the plane is moving relative to the air. If you could have a plane floating and not moving, the air wouldn't actually be pushing on it because there's nothing to push it back. When it's moving there's probably a lot more to consider but seeing as they don't expect you to know advanced aerodynamics just having done AS Physics, there's no need.

(edited 12 years ago)

Reply 187

I might go back and look at the question... if I can find it. It just seemed strange to me, how the hell should I know how wind is going to affect a plane, which we are just imagining? I'm pretty sure if it was made out of paper and there was a windspeed of 32km/h it would struggle! I see your point though, I guess it would make sense to make those assumptions, kind of :tongue:

Reply 188

Eggbloke

Original post by alexthomas93

2008 Q4:

Spoiler

Can you not just solve the inequality, so x^2 + 2 < 3- 3x^2, then 4x^2 < 1, so X^2<1/4 so x<+ or- 1/2, so -1/2<x<1/2

Reply 189

Benniboi1

9

i got the email and its for materials science and you have to write an extra statement about why you would like to study it. Seem like it would be good for people who got an A in chemistry last year and are carrying it on to A2 :smile:

Reply 190

Original post by Benniboi1

i got the email and its for materials science and you have to write an extra statement about why you would like to study it. Seem like it would be good for people who got an A in chemistry last year and are carrying it on to A2 :smile:

Are you thinking about doing it? I'm doing Chemistry and got an A... but it just seems the most painstakingly, mindnumbingly dull thing in the world to me. I don't think I'll say yes to that!

Now let's get onto revision. Can anyone explain fairly succinctly about 'the phases of the moon and eclipses'? Something I haven't really studied nor known a lot about. I've tried to find something on the internet without much luck and my teacher didn't really have a clue!!

Reply 191

Benniboi1

9

Original post by _Say_Goodbye_

Are you thinking about doing it? I'm doing Chemistry and got an A... but it just seems the most painstakingly, mindnumbingly dull thing in the world to me. I don't think I'll say yes to that!

Now let's get onto revision. Can anyone explain fairly succinctly about 'the phases of the moon and eclipses'? Something I haven't really studied nor known a lot about. I've tried to find something on the internet without much luck and my teacher didn't really have a clue!!

I haven't read much about the course :P but I got a C in Chemistry last year thanks to many reasons and dropped it, so theres no point in me applying!

Reply 192

ebygum

Original post by wcp100

2010-Q25

v)

Spoiler

For the horizontal kinetic energy I'm not sure how you've got 500j

Surely it's

Ke_x = \frac{1}{2} \times 10 \times 100^{2} = 50000j

?

Reply 193

AYEP

^^ thats what i got too.

also, would anyone mind posting solutions to the multiple choice qs for the 2010 PAT paper? if its no trouble.

thanks :biggrin:

Reply 194

For 2008 - Q. 10, did anyone else get

8\pi(6+3\sqrt{3}):27

to some lesser or greater degree of simplification?

Reply 195

und

16

Original post by Underwood94

For 2008 - Q. 10, did anyone else get

8\pi(6+3\sqrt{3}):27

to some lesser or greater degree of simplification?

I got

8 \pi (3 + 2 \sqrt{3}) : 9 \sqrt{3}

(edited 12 years ago)

Reply 196

ebygum

Original post by AYEP

^^ thats what i got too.

also, would anyone mind posting solutions to the multiple choice qs for the 2010 PAT paper? if its no trouble.

thanks :biggrin:

Here you go!

2010 PAT: Multiple Choice

12)

Spoiler

13) Seems easy, but I can't do it.

14)

Spoiler

15)

Spoiler

16)

Spoiler

17) Really don't understand the Q!

18)

Spoiler

19)

Spoiler

20) Not sure whether to use Kepler's 3rd Law or inverse squared rule?

21)

Spoiler

(edited 12 years ago)

Reply 197

Original post by und

I got

8 \pi (3 + 2 \sqrt{3}) : 9 \sqrt{3}

Yep, same thing I think :biggrin:

- I just multiplied by

\sqrt{3}

to get rid of the roots one on side.

Reply 198