OCR 21st GCSE Physics P7 - Ideas in Context revision thread

Original post by lauraaaaa

Freddy, I ****ing LOVE you right now. You may have just saved my ass!

Reply 101

lucilleJR

Hey, I know this isn't physics but seeing as a few of you have said you're doing FMSQ - how are you revising for FSMQ and physics?! And what are your predicted grades/results in mocks for FSMQ?! I think it's really hard!

Reply 102

Original post by lucilleJR

Hey, I know this isn't physics but seeing as a few of you have said you're doing FMSQ - how are you revising for FSMQ and physics?! And what are your predicted grades/results in mocks for FSMQ?! I think it's really hard!

Whats FSMQ

Reply 103

lucilleJR

Free Standing Maths Qualification, the OCR Advanced Maths thingy :smile:

Reply 104

Original post by lucilleJR

Free Standing Maths Qualification, the OCR Advanced Maths thingy :smile:

OK. Good Luck!

Reply 105

lucilleJR

Original post by Freddy-Francis

OK. Good Luck!

Thank you! :biggrin:

Reply 106

Ah, after this thread now I'm feeling a little more confident! What does everyone want to come up and not want to come up?

I want things about the conditions observatories need to be built in but not much about Cepheid variables because they get me in a muddle :/

I dont mind.

Wish I knew enough not to mind hahah.

Reply 109

Just do some good revision. Remember about how a temperature increases in a star {This has come in most past papers}

Reply 110

To do with pressure right? More pressure increases kinetic energy and the frequency of collisions? Or am I just talking out of my backside?

Reply 111

SomePotential

4

Original post by SarahLeanne

Guys, I have a question.

If there is a probability question on the graph, would you just give the probability as a time between impacts? (time between impacts is on the y axis and minimum asteroid diameter is on x axis)

Eg, if you were to read off the scale an asteroid with a minimum diameter of 2500 m has an average of 0.6 million years between impacts. What would be the probability for an asteroid that big hitting? Or wouldn't you be able to work a probability out with this information?

Any help would be much appreciated! There's got to be at least one question on the graph or it wouldn't have been included.

Sarah x

The probability is that an asteroid with the diameter of 2500m will hit us once every 0.6 million years. You could convert it to asteroid hits per million years, by doing 1 divided by the value on the y-axis.
So here it would be 1/0.6, to get 1.67 asteroid hits(of a diameter of 2500m) every million years.

Reply 112

Original post by lauraaaaa

To do with pressure right? More pressure increases kinetic energy and the frequency of collisions? Or am I just talking out of my backside?

Thats right babe. If it is 3 marks then say that there is an increase in the gravitational pull.

Reply 113

THANK THE LORD I ACTUALLY KNOW SOMETHING! Probably won't even come up now -.- hahah! Ah okay! Why couldn't you just be my teacher? Learnt more from you in half an hour than I have from him all year. Taught myself -.-

Reply 114

xXxDHxXx

2

Original post by lucilleJR

Hey, I know this isn't physics but seeing as a few of you have said you're doing FMSQ - how are you revising for FSMQ and physics?! And what are your predicted grades/results in mocks for FSMQ?! I think it's really hard!

For Physics, I mostly finsihed ALL revision.
Done a few past papers and without the IIC I'm getting A*'s

As for FSMQ..it's my optional choice. I did C1 early this year and obtained a Grade A. Recently finished C2, so I am fine.

However, I will need to do some revision on Kinematics, Mechanis, Stats and Linear Programming before I feel completely confident.

I revise that by going over notes, doing a few questions and take it from there, there isn't REALLY a way to revise for Maths apart from going over the forumulaes and acknowledging how it is applied into a question in order to solve for the answer.

I have Business Studies exam tomorrow as well - all 3! Argh!!!
Goodluck!

Reply 115