UNOFFICIAL MARKSCHEME!~AQA GCSE Physics Unit 2 25th Janurary NEW SPEC

Original post by LemonFish

Alpha particles contain 2 protons which possess a positive charge, which is why they would be deflected by the electrical field and beta particles are basically fast moving electrons with a negative charge of -1, which is why they would also be deflected.

Gamma radiation is emitted as a wave, which means it cannot possess an electrical charge

Why is a beta particle deflected at a greater angle by an electrical field than a Alpha particle?

Beta particles have a smaller mass so are more easily attracted to the positive side of the electric/magnetic field

Reply 165

Farhan96

6

Good luck guys, did this exam in june so I would say revise nuclear fission and fusion for sure because it didnt come up in our exam and life of stars.

Reply 166

i'd love it if the six marker was on the life cycle of stars

Reply 167

Original post by ayshac94

i'd love it if the six marker was on the life cycle of stars

Can you explain to me the life cycle of stars like our sun (6 marks)

Reply 168

http://www.youtube.com/watch?v=mmF7qZn3jU4&list=PL129D5CD08325652A

Original post by Efemena15

Can you explain to me the life cycle of stars like our sun (6 marks)

i watched this, it explains it really well :smile:

Reply 169

http://www.youtube.com/watch?v=mmF7qZn3jU4&list=PL129D5CD08325652A

Original post by ayshac94

i watched this, it explains it really well :smile:

Haha thanks but I've already seen it, I was checking if you knew

Reply 170

Original post by Efemena15

Haha thanks but I've already seen it, I was checking if you knew

something like this maybe?
Stars are born in nebulae. Huge clouds of dust and gas collapse under gravitational forces, forming protostars. These young stars undergo further collapse, forming main sequence stars.

Stars expand as they grow old. As the core runs out of hydrogen and then helium, the core contacts and the outer layers expand, cool, and become less bright. This is a red giant or a red super giant (depending on the initial mass of the star). It will eventually collapse and explode. Its fate is determined by the original mass of the star; it will become either a red dwarf, neutron star, or black hole.

Reply 171

lolface32

Guys, do we have to know ALL the formulas, in the mock we were given them all? Would they do that again?

Reply 172

Original post by lolface32

Guys, do we have to know ALL the formulas, in the mock we were given them all? Would they do that again?

we're given them :smile:

Reply 173

Do you guys know much about regenerative braking?

Reply 174

Quantaˌ

3

Does anyone have the examiner report for the Unit 2 test in June 2012? Thanks.

(edited 11 years ago)

Reply 175

username1042290

Original post by lolface32

Guys, do we have to know ALL the formulas, in the mock we were given them all? Would they do that again?

Given them all but not given speed = distance/time which we were told by our teacher we'd need to know - pretty basic anyway.

Reply 176

BI0

7

Original post by ayshac94

something like this maybe?
Stars are born in nebulae. Huge clouds of dust and gas collapse under gravitational forces, forming protostars. These young stars undergo further collapse, forming main sequence stars.

Stars expand as they grow old. As the core runs out of hydrogen and then helium, the core contacts and the outer layers expand, cool, and become less bright. This is a red giant or a red super giant (depending on the initial mass of the star). It will eventually collapse and explode. Its fate is determined by the original mass of the star; it will become either a red dwarf, neutron star, or black hole.

Whats a red dwarf? :tongue:

Reply 177

bbadonde2