IAL Edexcel A2 Physics June 2019 (Old syllabus)

But why does it require that?

Original post by heartx desire

To ensure enough colliding protons for the reaction to be sustained requires a very high density of them.

Reply 89

Need help with part b pls
How to do this?

Reply 90

Original post by saadibne69

Frequency^2 proportional to g

Hey, sorry but i still can't seem to get it. Can you explain a bit more? Sorry

Reply 91

Original post by Presto

Need help with part b pls
How to do this?

Use the discharching part and T=RC.
0.37 of 4V is 1.48 and from the graph, starting from 1s it takes approx 0.2 s, so 0.2=15x10^3 x C and C= 1.3×10^-5 F

Reply 92

Anon#9

Could baryons include a mixture of quarks and anti quarks?

@Nabs78, they did not mention the length of the blade.

Reply 93

Nabs78

OP

Original post by Saman_B9

Could baryons include a mixture of quarks and anti quarks?

@Nabs78, they did not mention the length of the blade.

Yes Baryons can have anti baryons that have anti quarks(proton and anti proton) but im not sure about 1 baryon having both quarks and anti quarks.

Well I guess its a wrongly worded question then :rolleyes:

Reply 94

Original post by Erica.kh

Use the discharching part and T=RC.
0.37 of 4V is 1.48 and from the graph, starting from 1s it takes approx 0.2 s,
so 0.2=15x10^3 x C and C= 1.3×10^-5 F

Thank you soo much! :smile:

One q capacitors have no resistance of their own?

Reply 95

Anneyong <3

16

Help me understand this too please babies, this is the Jan 2015 paper.

1)State what is meant by a positron, and suggest why positron emission is unlikely to occur for nuclei with an excess of neutrons.

Answer:
A positron is the antiparticle to the electron Or a positron is an anti-electron Or a positron has the same mass as an electron but the opposite charge
Idea that positron emission increases the number of neutrons in the nucleus

I don't understand the last sentence

Reply 96

Original post by Anneyong <3

Help me understand this too please babies, this is the Jan 2015 paper.

1)State what is meant by a positron, and suggest why positron emission is unlikely to occur for nuclei with an excess of neutrons.

Answer:
A positron is the antiparticle to the electron Or a positron is an anti-electron Or a positron has the same mass as an electron but the opposite charge
Idea that positron emission increases the number of neutrons in the nucleus

I don't understand the last sentence

Lol I had the exact same question a few days ago. K so apparently, since positron is B+, it's proton number is -1 (idk maybe cuz it's not a proton but the opposite or smth, it was in the textbook somewhere) so to balance, the products proton number increases by one.

Example: (just proton numbers)
55 Cs ------> 56 Ba + (-1) B

Reply 97

Original post by Presto

Thank you soo much! :smile:

One q capacitors have no resistance of their own?

Np : ) and i dont think so, not really sure about that tho. Hopefully they wont include that

Reply 98

Anneyong <3

16

I don't understand love

Original post by Erica.kh

Lol I had the exact same question a few days ago. K so apparently, since positron is B+, it's proton number is -1 (idk maybe cuz it's not a proton but the opposite or smth, it was in the textbook somewhere) so to balance, the products proton number increases by one.

Example: (just proton numbers)
55 Cs ------> 56 Ba + (-1) B

Reply 99