AQA Additional Science Physics Modual - 21st Jan - Revision Thread Watch

braceface
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#41
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#41
(Original post by piece_by_piece)
I think there's 7 topics?

I've revised them all but i dont know anything:/
i meant small topics within topics
like thermal radiation and conduction in the heat transfer topic.
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definite_maybe
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#42
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#42
i was just wondering if anybody understood the page on LDR in the textbook. I know that increase in light intensity decreases resistance, but i dont understand how it can be used in automatic night light. Could anybody expalin please?
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jelly1000
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#43
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#43
I was just looking at the previous posts- I was told that you didn't have to learn the equations- they are given to you, you just rearrange them where appropriate.

Good luck everyone with the exam.
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m8nmina0h4
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#44
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#44
Kept the whole day free to revise and didn't get anything done, I managed to do some work these past 2 weeks for mocks and other exams, but now I'm out of exam mood.. I better get some revision done tomorrow before the exam or I'm ******!

Actually, I do understand pretty much all the stuff on forces etc.. and know most the equations, just need to actually learn the static electricity examples and all the radiation stuff, in particular nuclear fission and fusion!

Don't know why I didn't work for this one, considering it's so important..

Good luck to everyone!

PS: To anyone who reads this before the exams, LEARN THE EQUATIONS , they didn't give them in the specimen paper so I don't see why they would for the exam!
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Jhon
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#45
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#45
Urgh, Im nervous
I think i know it. Im in year 10 so ill be taking that exam Dunno whther you guys are in year 11 or year 10 :P
Anyway, I know:
Radiation and how its used in medicine and stuff
Different types of radio waves - Digital and analogue
Ionization
The universe - red shift and stuff..

I dont know all the formulae and I need to go over Electricity.
apart fromthat I should do fine At least I get the morning off to revise eh?
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jelly1000
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#46
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#46
In the June 2007 Paper they gave you the equation wavespeed=frequencyxwavelength (you had to rearrange it) so I can't see why they wont give other equations to you.
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Matthewsimpson
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#47
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#47
grrrr. They did give the equations! I knew I would be right. haha. All that fuss over nothing.

I really liked the exam though, nothing too hard apart from the rods. How did everyone else find it?
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riotsandraves
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#48
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#48
it was okay
the rod question was easy
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Matthewsimpson
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#49
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#49
(Original post by riotsandraves)
it was okay
the rod question was easy
Was it? I thought it was to do with neutrons or something but I didn't know what to write to be honest.
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riotsandraves
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#50
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#50
(Original post by Matthewsimpson)
Was it? I thought it was to do with neutrons or something but I didn't know what to write to be honest.
if the rods absorbed the neutrons the neutrons wouldnt be able to go on and be absorbed by other nuclei so it stops the chain reaction and controls it
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riotsandraves
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#51
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#51
whats the resultant force
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Matthewsimpson
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#52
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#52
(Original post by riotsandraves)
if the rods absorbed the neutrons the neutrons wouldnt be able to go on and be absorbed by other nuclei so it stops the chain reaction and controls it
Ah that makes more sense.

And I said that the plane was stationary because the resultant force was zero, as in the result of the two forces, thrust and drag resulted in nothing.
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riotsandraves
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#53
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#53
(Original post by Matthewsimpson)
Ah that makes more sense.

And I said that the plane was stationary because the resultant force was zero, as in the result of the two forces, thrust and drag resulted in nothing.
but it said the plane was moving
so i said moving at constant speed
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davedave4619
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#54
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I actually found that to be the hardest exam of them all. Did everyone remeber to convert 8 hours into seconds for the question on charge about the electronic wheel chair?
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Matthewsimpson
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#55
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#55
(Original post by riotsandraves)
but it said the plane was moving
so i said moving at constant speed
I didn't see that it said it was moving...if the resultant force is zero then how can anything be happening?
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monkee
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#56
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#56
I got 3m/s2 acceleration and I didn't put a line when the car was moving in that graph question...how many marks could I have lost?
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billet-doux
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#57
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#57
I can not believe the equations were provided! Our teachers said they wouldn't be!
:O

Also, i said the plane was moving! When the resultant force is 0, it can either be moving at the same speed, or be stationary! I said it was moving because it said in the question it was!

Tbh, i thought it was pretty hard! Not as bad as biology, but still hard. Chemistry was definitely the easiest! I'm sure we've all done well though! Good luck everyone for the results in March! haha.
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riotsandraves
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#58
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#58
(Original post by Matthewsimpson)
I didn't see that it said it was moving...if the resultant force is zero then how can anything be happening?
When the resultant force is zero

When all the forces are balanced, the resultant force is zero. In this case:

A stationary object remains stationary.
A moving object keeps on moving at the same speed in the same direction.

and since it said the plane was moving the second one applies
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riotsandraves
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#59
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#59
(Original post by davedave4619)
I actually found that to be the hardest exam of them all. Did everyone remeber to convert 8 hours into seconds for the question on charge about the electronic wheel chair?
what was the answer to that one
i got a really large answer
like realllly bigg
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billet-doux
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#60
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#60
Don't worry i got a really big answer as well, though i don't remember what i got! It was because you had to do 8*60*60 to get the seconds.
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