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OCR Physics A G484 - The Newtonian World - 11th June 2015

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Reply 1020

laureeenk

Original post by saeed97

Maybe a brick this time? jk but good luck :smile:

They could throw worse things I'm sure... But thanks!

Reply 1021

boristeve

Original post by chem@uni

Can anyone list all the bullet points for Brownian motion
and all the experiments we are meant to know#?

here you are pal;

1. air molecules are moving randomly
2. with different speeds
3. mass of air molecules is smaller than smokeparticles
a. (movement of smoke particles causedby being hit by randomly moving air molecules
b. smoke particles are continuously movingbecause the air molecules arecontinuously moving
c. smoke particles are visible but airmolecules are not hence air moleculesmust be very small.
d. small movement of smoke particles isdue to the large numbers of airmolecules hitting from all sides)

Reply 1022

seizetoday

Original post by boristeve

there is no reaction force acting on the pilot from his seat. the pilots weight force supplies the necessary centripetal force for circular motion, so no reaction force = apparent weightlessness

Thanks

Reply 1023

Exaltation

Original post by Raizel

I have some dead handwriting but here bro.

Nice Arabic :tongue:

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Reply 1024

laureeenk

wordy questions on spec heat?

Reply 1025

Exaltation

Original post by laureeenk

wordy questions on spec heat?

It came up last year so I doubt it'll come up this year. Probably a 6 marker on SHM

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Reply 1026

Raizel

Original post by Exaltation

Nice Arabic :tongue:

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yeah man 3 hour Arabic exam tomorrow straight after g484.
and then I have to do a 2hour economics exams after Arabic.
FUNFUNFUN

Reply 1027

MathsAddict

Hardest thermal question i could think of :P specific heat capacity is 0.385 for this question good luck solving it :smile:

IMG_7137.JPG304.4KB

Reply 1028

chem@uni

Original post by Exaltation

It came up last year so I doubt it'll come up this year. Probably a 6 marker on SHM

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Has there been one previous?

Reply 1029

Exaltation

Original post by Raizel

yeah man 3 hour Arabic exam tomorrow straight after g484.
and then I have to do a 2hour economics exams after Arabic.
FUNFUNFUN

How difficult do you think it is to learn Arabic as a non-Arab? (I'm guessing you're Arab)

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Reply 1030

Exaltation

Original post by chem@uni

Has there been one previous?

Yeah 6 marker on SHC of Oil last year

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Reply 1031

Flux_Dubstep

when do you use pV=NkT as opposed to pV=nRT?

Reply 1032

Exaltation

Original post by Flux_Dubstep

when do you use pV=NkT as opposed to pV=nRT?

N is the Number of Atoms. n is the number of Moles

Correct me if I'm wrong

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Reply 1033

username1823163

Hey guys does anybody have june 14 paper?
Id really appreciate it.

Reply 1034

BecauseFP

Just to double check, for Newton's law of gravitation, is the r term the distance between the centres of the objects or is it something else?

Reply 1035

chem@uni

Original post by firebaron999

Hey guys does anybody have june 14 paper?
Id really appreciate it.

Back a few pages

Reply 1036

chem@uni

Original post by BecauseFP

Just to double check, for Newton's law of gravitation, is the r term the distance between the centres of the objects or is it something else?

No that is it

Reply 1037

actanide

im 99% sure they dont accept spy for geostationary satellites but they do accept spy satellites for non-geostationary

Reply 1038

MathsAddict

I just hope it isn't an awkward paper tbh i am comfortable when it comes to calculations

Reply 1039

chem@uni

Why is Keplers law according to June 2012 mark scheme

The cube of the planets distance (from the Sun) divided by the square of the(orbital) period is the same (for all planets) (WTTE)

Instead of T^2/R^3 = constant which is more clear from formula

Im aware it is just one over constant but just dont see the logic in writing it the other way round than in the formula books?