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GCSE OCR 21st Century Physics P7
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kxylah
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#1
Started from b123 and now we're here....
this is my last exam! so happy! some people are taking further maths i believe... but my school didn't offer it
so anyways, how's everyone feeling for this exam? i took gcse astronomy in year 9 so i'm pretty confident, although i hate the reflecting/refracting telescope stuff.
any 6 marker predictions?
this is my last exam! so happy! some people are taking further maths i believe... but my school didn't offer it
so anyways, how's everyone feeling for this exam? i took gcse astronomy in year 9 so i'm pretty confident, although i hate the reflecting/refracting telescope stuff.
any 6 marker predictions?
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CookieHero
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#2
stressed16
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Jitesh
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#4
Hey guys I'll post some questions again like last time soon for you if anyone found the chem ones useful
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Zaydo
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#5
CookieHero
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tessa332
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#7
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#7
(Original post by Jitesh)
Hey guys I'll post some questions again like last time soon for you if anyone found the chem ones useful
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Hey guys I'll post some questions again like last time soon for you if anyone found the chem ones useful
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Jitesh
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#8
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#8
(Original post by tessa332)
^^^^^ Yes please 6 marker predictions were really helpful for chemistry, so thank you!!!
^^^^^ Yes please 6 marker predictions were really helpful for chemistry, so thank you!!!
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kxylah
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#9
do we have to memorise the hubble constant or do they give it to you in the exam??
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ETbuymilkandeggs
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#10
(Original post by kxylah)
do we have to memorise the hubble constant or do they give it to you in the exam??
do we have to memorise the hubble constant or do they give it to you in the exam??
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derpz
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#11
10evanse
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#12
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#12
(Original post by kxylah)
Started from b123 and now we're here....
this is my last exam! so happy! some people are taking further maths i believe... but my school didn't offer it
so anyways, how's everyone feeling for this exam? i took gcse astronomy in year 9 so i'm pretty confident, although i hate the reflecting/refracting telescope stuff.
any 6 marker predictions?
Started from b123 and now we're here....
this is my last exam! so happy! some people are taking further maths i believe... but my school didn't offer it
so anyways, how's everyone feeling for this exam? i took gcse astronomy in year 9 so i'm pretty confident, although i hate the reflecting/refracting telescope stuff.
any 6 marker predictions?
Would you be able to explain cepheid variables because I dont understand how they can figure out how far away they are?? And also why is it that some images are magnified, diminished or real/virtual? THank you very much
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Jitesh
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#13
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#13
(Original post by kxylah)
do we have to memorise the hubble constant or do they give it to you in the exam??
do we have to memorise the hubble constant or do they give it to you in the exam??
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derpz
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#14
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#14
(Original post by 10evanse)
I really hate P7! I get so confused with everything
Would you be able to explain cepheid variables because I dont understand how they can figure out how far away they are?? And also why is it that some images are magnified, diminished or real/virtual? THank you very much
I really hate P7! I get so confused with everything
Would you be able to explain cepheid variables because I dont understand how they can figure out how far away they are?? And also why is it that some images are magnified, diminished or real/virtual? THank you very much
The general relationship between luminosity and period is this:
Higher period = higher luminosity.
By finding their brightness, they can calculate the distance using the parallax effect (relative and real brightness).
If I am wrong correct me, this is just off the top of my head since I haven't revised P7 yet.
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derpz
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#15
(Original post by derpz)
Cepheid variable stars change in luminosity over a period. The longer the period, the greater the luminosity. You can use the visible brightness to see what their period is. This can then be compared to reference stars.
The general relationship between luminosity and period is this:
Higher period = higher luminosity.
By finding their brightness, they can calculate the distance using the parallax effect (relative and real brightness).
If I am wrong correct me, this is just off the top of my head since I haven't revised P7 yet.
Cepheid variable stars change in luminosity over a period. The longer the period, the greater the luminosity. You can use the visible brightness to see what their period is. This can then be compared to reference stars.
The general relationship between luminosity and period is this:
Higher period = higher luminosity.
By finding their brightness, they can calculate the distance using the parallax effect (relative and real brightness).
If I am wrong correct me, this is just off the top of my head since I haven't revised P7 yet.
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el Brah
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#16
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#16
(Original post by kxylah)
Started from b123 and now we're here....
this is my last exam! so happy! some people are taking further maths i believe... but my school didn't offer it
so anyways, how's everyone feeling for this exam? i took gcse astronomy in year 9 so i'm pretty confident, although i hate the reflecting/refracting telescope stuff.
any 6 marker predictions?
Started from b123 and now we're here....
this is my last exam! so happy! some people are taking further maths i believe... but my school didn't offer it
so anyways, how's everyone feeling for this exam? i took gcse astronomy in year 9 so i'm pretty confident, although i hate the reflecting/refracting telescope stuff.
any 6 marker predictions?
Shame you're not doing further maths, it's beast. You doing it in college at least?
Further maths is basicly a tonne of curved graphs, finding gradients of tangents, matrices, algebra, circle theorems & graphs, sexy trigonometry, and every question is basicly worth more than most pussies (normally 4 to 5 marks, if you're a nerd it's super easy to score). There's normally like 15 to 17 questions too, so it doesn't take long to finish you could probably get high and **** some *****es halfway through and still pass. Oh yeah it's also about floating triangle doritos, shame physics isn't about that :/
Spoiler: ![Image]()
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el Brah
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#17
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#17
(Original post by Jitesh)
Aha I didn't have c7 predictions but I have mathy/understanding ones
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Aha I didn't have c7 predictions but I have mathy/understanding ones
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username1941491
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#18
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#18
Taking one for the team, and lowering the grade boundaries for us all.
IT HATE THIS TOPIC - it's all interconnected, but one minute there I am learning about gas laws and then BOOM telescope - it just seems like too much? Plus the lenses/telescope things make me want to stand in the core of the Sun, so y'aknow.
Right, off to go ingest a book.
IT HATE THIS TOPIC - it's all interconnected, but one minute there I am learning about gas laws and then BOOM telescope - it just seems like too much? Plus the lenses/telescope things make me want to stand in the core of the Sun, so y'aknow.
Right, off to go ingest a book.
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username613045
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#19
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#19
This will be the last bit of physics I will ever have to do (hopefully). I'm not looking forward to it because I find physics hard to start with and P7 is the hardest part of the course. Why did I take triple science?!?!?!?!?
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username1941491
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#20
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#20
(Original post by el Brah)
FML I hate physics so bad....it's maths (good) mixed with atheist bull**** (not so good). If you know Einstein's formula E = MC^2 (which he ripped off some german scientist and got a nobel prize for), how photons work, and how weed helped hubble find Hubble's constant, then you should be good
Shame you're not doing further maths, it's beast. You doing it in college at least?
Further maths is basicly a tonne of curved graphs, finding gradients of tangents, matrices, algebra, circle theorems & graphs, sexy trigonometry, and every question is basicly worth more than most pussies (normally 4 to 5 marks, if you're a nerd it's super easy to score). There's normally like 15 to 17 questions too, so it doesn't take long to finish you could probably get high and **** some *****es halfway through and still pass. Oh yeah it's also about floating triangle doritos, shame physics isn't about that :/
FML I hate physics so bad....it's maths (good) mixed with atheist bull**** (not so good). If you know Einstein's formula E = MC^2 (which he ripped off some german scientist and got a nobel prize for), how photons work, and how weed helped hubble find Hubble's constant, then you should be good
Shame you're not doing further maths, it's beast. You doing it in college at least?
Further maths is basicly a tonne of curved graphs, finding gradients of tangents, matrices, algebra, circle theorems & graphs, sexy trigonometry, and every question is basicly worth more than most pussies (normally 4 to 5 marks, if you're a nerd it's super easy to score). There's normally like 15 to 17 questions too, so it doesn't take long to finish you could probably get high and **** some *****es halfway through and still pass. Oh yeah it's also about floating triangle doritos, shame physics isn't about that :/
Spoiler: ![Image]()
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