[Abrar_Higuain]

(Original post by saadmansakib)
Overall easy paper. I took a beaker full of water and dipped the diode in it and labelled it! You don't have to worry about, how diode is an electrical component and may not work well under water! It was a ditto of NTC thermistor!

K uncertainity - 8.4%
V uncertainity - 3.9%
Value of K - 6.17

Theory not supported, since percentage difference in K (37.1%) relating to the given g=9.81 was greater than percentage uncertainity in K.

I am just confused about the value of the Temperature of the asteroid (Weinn'z Law Question)

Help me out by suggesting your answers for T

my value of T was 193.2k coz i drew a straight line...not a CURVE...it clearly stated BEST FIT LINE..even though most of the people drew a curve.....

[saadmansakib]

My value for T was 193.5...

Most of the people who knew the shape of the curve, even they drew a straight line! The curve was clearly given in Hodder Physics A2 textbook!

Best fit line doesn't always have to be a straight line!

Anyways, I found out the range of T since you have to estimate it! I tried extrapolation! But the same result comes

So my guess would be anything around 200 is fine! Some people had answers 200-210K. So anything around 200 is fine!

[Parthenon93]

(Original post by saadmansakib)
Overall easy paper. I took a beaker full of water and dipped the diode in it and labelled it! You don't have to worry about, how diode is an electrical component and may not work well under water! It was a ditto of NTC thermistor!

K uncertainity - 8.4%
V uncertainity - 3.9%
Value of K - 6.17

Theory not supported, since percentage difference in K (37.1%) relating to the given g=9.81 was greater than percentage uncertainity in K.

I am just confused about the value of the Temperature of the asteroid (Weinn'z Law Question)

Help me out by suggesting your answers for T

I took the wavelength to be 12.2 x 10^-6m and got temperature around 238K .

[Parthenon93]

(Original post by saadmansakib)
My value for T was 193.5...

Most of the people who knew the shape of the curve, even they drew a straight line! The curve was clearly given in Hodder Physics A2 textbook!

Best fit line doesn't always have to be a straight line!

Anyways, I found out the range of T since you have to estimate it! I tried extrapolation! But the same result comes

So my guess would be anything around 200 is fine! Some people had answers 200-210K. So anything around 200 is fine!

What was your value for wavelength?

Didn't the highest cross fall in the middle of 10-15 range? Or did you peak your curve to the maximum possible intensity?

[Abrar_Higuain]

(Original post by saadmansakib)
My value for T was 193.5...

Most of the people who knew the shape of the curve, even they drew a straight line! The curve was clearly given in Hodder Physics A2 textbook!

Best fit line doesn't always have to be a straight line!

Anyways, I found out the range of T since you have to estimate it! I tried extrapolation! But the same result comes

So my guess would be anything around 200 is fine! Some people had answers 200-210K. So anything around 200 is fine!

Well i would say people who drew the curve had temp around 230-240k...but people who drew srtaight line had answer around 190-200k.....but bro iz it really possibly logical enough to say BEST FIT LINE can actually be CURVE....well people who drew the curve had good logic bcoz acc to theory it had to be curve but ALAS the question said LINE.....

[saadmansakib]

As I posted earlier, I extrapolated, and found out the answer, which was 198K, anything around 200 is perfectly fine!

Wavelengthmax= 15x10^-6m

The graph will be a curve not doubt about that! And for every question like gradient from graph, which we have to estimate, has always a range to the answers. If you fall in that range, you will get full marks. This question was something like that, answers will vary person to person depending on their estimation.

Here the answer of T depended on the wavelength. And if you estimated anything between (15 to 16.5) x 10^-6m you are safe!

[Dissh.M]

i got 241.5 K

[meraphox]

Does anyone know which experiment we must know for the exam?
Like last year the Rutherford experiment came up. Do we need to know any of the experiments from the edexcel books? If so which ones?
Any help is greatly appreciated.


This was posted from The Student Room's iPhone/iPad App

[saadmansakib]

Practical 1 Momentum and momentum conservation - large trolleys
Practical 2 Momentum and momentum conservation - small trolleys
Practical 3 Momentum and momentum conservation using a linear air track
Practical 4 Rate of change of momentum using a linear air track
Practical 5 Rate of change of momentum using a trolley
Practical 6 Centripetal force - whirling bung
Practical 7 Centripetal force - rotating trolley
Practical 8 Measuring the charge stored by a capacitor
Practical 9 Effect of length and current on the force on a wire in a magnetic field
Practical 10 Specific heat capacity of a liquid
Practical 11 Specific heat capacity of a solid
Practical 12 The relationship between the pressure and temperature of a gas
Practical 13 The relationship between the pressure and volume of a gas
Practical 14 Measurement of the activity of a radioactive source
Practical 15 Simulation of radioactive decay
Practical 16 Graphical representation of simple harmonic motion
Practical 17 Forced oscillations
Practical 18 Investigating damped oscillations

These are the experiments you need to know. Most of the experiments are in the Hodder A2 Physics Textbook. In this book, there is also a section named A guide to practical work, that section has mostly everything regarding uncertainties.

And also, you are required to have knowledge of AS. Try to solve May 2012 6B paper, you will come across two questions from your AS physics! Question paper pattern is changing!

[meraphox]

(Original post by saadmansakib)
Practical 1 Momentum and momentum conservation - large trolleys
Practical 2 Momentum and momentum conservation - small trolleys
Practical 3 Momentum and momentum conservation using a linear air track
Practical 4 Rate of change of momentum using a linear air track
Practical 5 Rate of change of momentum using a trolley
Practical 6 Centripetal force - whirling bung
Practical 7 Centripetal force - rotating trolley
Practical 8 Measuring the charge stored by a capacitor
Practical 9 Effect of length and current on the force on a wire in a magnetic field
Practical 10 Specific heat capacity of a liquid
Practical 11 Specific heat capacity of a solid
Practical 12 The relationship between the pressure and temperature of a gas
Practical 13 The relationship between the pressure and volume of a gas
Practical 14 Measurement of the activity of a radioactive source
Practical 15 Simulation of radioactive decay
Practical 16 Graphical representation of simple harmonic motion
Practical 17 Forced oscillations
Practical 18 Investigating damped oscillations

These are the experiments you need to know. Most of the experiments are in the Hodder A2 Physics Textbook. In this book, there is also a section named A guide to practical work, that section has mostly everything regarding uncertainties.

And also, you are required to have knowledge of AS. Try to solve May 2012 6B paper, you will come across two questions from your AS physics! Question paper pattern is changing!

Is that for coursework? I went through the spec yesterday and didn't see anything about knowing practicals for the written papers
I've already finished the coursework just want to knw whether I should learn all practicals for the written exams


This was posted from The Student Room's iPhone/iPad App

[d_94]

(Original post by 584385)
Revision notes for edexcel unit 5

Wheres radioactivity?

[584385]

(Original post by d_94)
Wheres radioactivity?

Here is Nuclear decay...just one little bit missing will try and finish it by then end of the week

[d_94]

(Original post by 584385)
Here is Nuclear decay...just one little bit missing will try and finish it by then end of the week

Greatt! Thanks (: Take your time with the remaining.

[Zombie _94]

Hey. help please , does anyone have past papers for a2 physics unit 4 ?????

[584385]

(Original post by Zombie _94)
Hey. help please , does anyone have past papers for a2 physics unit 4 ?????

Unit 4 papers

[584385]

Unit 4 Mark schemes

[Zombie _94]

Thanks alot

[elkana]

Anyone got the June 2012 papers they would help aaaalllllloooooootttttttt

[d_94]

(Original post by elkana)
Anyone got the June 2012 papers they would help aaaalllllloooooootttttttt

Hahahha. I wish there was

[Omar1994]

Cba for this exam lol