AQA AS physics paper 1 unofficial markscheme - 14 May 2019

Question One - Work our specific charge of Duetirium 1.6 x 10^-19 / 2x 1.674 x 10^-27

= 4.78 x 10^7

Reply 3

LivanC21

Tritium cannot go through alpha decay - due to baryon number conservation
Beta decay forms helium -3 so beta decay is the right answer

Reply 4

detdom

3

It said that an isotope is formed and both alpha and beta decay affect proton number, so must be electron collision.

Original post by LivanC21

Tritium cannot go through alpha decay - due to baryon number conservation
Beta decay forms helium -3 so beta decay is the right answer or whatever the third option was.

Reply 5

aqaboy

Original post by detdom

It said that an isotope is formed and both alpha and beta decay affect proton number, so must be electron collision.

No I think you misread the question. I believe it was asking for a decay which will produce another element. Only beta minus decay is possible.

Reply 6

Original post by aqaboy

No I think you misread the question. I believe it was asking for a decay which will produce another element. Only beta minus decay is possible.

yeah you are correct also it was a 3 marker so the better answer would be to say why electron collision isnt possible as it would form a atom with zero protons which is not possible so beta decay is right

Reply 7

anyone else find that super easy the only question i messed up on was the resistance question as i used 2 into emf thinking it was 2 cells instead of one battery and that messed me up but everything else was pretty fine

Reply 8

what did everyone get for the energy stored as elastic strain energy and if you could reach 50m
i said you couldnt because mgh for 50m is higher than the elastic strain energy at the begining so you cant have energy created

Reply 9

angad1102

yeah I got the same

Original post by shivthakur

what did everyone get for the energy stored as elastic strain energy and if you could reach 50m
i said you couldnt because mgh for 50m is higher than the elastic strain energy at the begining so you cant have energy created

Reply 10

angad1102

What did you guys get for the resistance question, the one with the LED and the graph?

Reply 11

Chelsea Kaye

****ed it i got like 50 ohms

Original post by angad1102

What did you guys get for the resistance question, the one with the LED and the graph?

Reply 12

arothman101

I got something in the 300 s can remember exact number

Original post by Chelsea Kaye

****ed it i got like 50 ohms

Reply 13

is this the same angad from desc

Original post by angad1102

What did you guys get for the resistance question, the one with the LED and the graph?

Reply 14

angad1102

yes boss

Original post by shivthakur

is this the same angad from desc

Reply 15

Lou1331

3

I also got Around 50

Original post by arothman101

I got something in the 300 s can remember exact number

Reply 16

Germa

Original post by shivthakur

what did everyone get for the energy stored as elastic strain energy and if you could reach 50m
i said you couldnt because mgh for 50m is higher than the elastic strain energy at the begining so you cant have energy created

Had the exact same answer

Reply 17

Germa