PHYA5 ~ 20th June 2013 ~ A2 Physics

Reply 1420

Infinity1

Original post by Jam Jam24

did you guys get 8.5C for the Tf of the water?

Yes, and 0.016kg for the mass of ice (using exact values)

Reply 1421

George_

2

Ahh that was so difficult! All my mates thought it was fine, but I hated it! Couldn't do the Heat questions, and could barely answer anything very well!

Grr, oh well.

Reply 1422

josephtsui

Original post by MisterE1

Proton number of 1 means mass number of1, so1 was lost from top and bottom

Posted from TSR Mobile

Hey, go to textbook P.158 and read the Beta+ emission again. A is unchanged.

Reply 1423

mrwho

Original post by MisterE1

Proton number of 1 means mass number of1, so1 was lost from top and bottom

Posted from TSR Mobile

No, because positron decay converts a proton into a neutron. There is a gain of a neutron and loss of a proton, no net loss of nucleon number.

Reply 1424

Pinkhead

14

I got 8.4something Celsius for Tf and 0.013kg for the ice. Core section was harder than normal and Turning Points was easier than normal.

Reply 1425

SortYourLife

16

Humph. Really don't know if I've done enough :frown:

Posted from TSR Mobile

Reply 1426

Jam Jam24

8

Original post by Infinity1

Yes, and 0.016kg for the mass of ice (using exact values)

Thats great! I couldnt do the mass of ice and I used the Tf value as 8, will i get some marks? :smile:

i wrote out the equations and stuff

Reply 1427

Dslash

Original post by Infinity1

Yes, and 0.016kg for the mass of ice (using exact values)

Woo i got that for the mass of the ice too :biggrin:

Couldn't do part a though.

Reply 1428

blahblahh

so was the mass of the oxygen 15 ? or 16 ? And what was the one below that ? I cant remember the question

Reply 1429

blahblahh

got 0.016 for the mass of the ice then crossed it out and did it different noooooo :frown:

Reply 1430

AWithers95

Original post by blahblahh

so was the mass of the oxygen 15 ? or 16 ? And what was the one below that ? I cant remember the question

15, I believe.

Reply 1431

mrwho

Feeling good about nuclear now that I've got the same answers as everyone else for the hard ones. The only questions I've definitely got wrong is the definition of the atomic mass unit and what the neutrons do when they collide elastically. I've almost definitely lost at least 3 marks in the 6-markers too. But I don't think I've done badly enough to not get an A.

Anyoen remember their answers for applied? I can't, but any similar answers would hopefully ring a bell.

Reply 1432

sports_crazy

That paper was filth. bloody awful. Astrophysics was the only thing I could do. CCD 6 MARKER. I could just think of 2-3 points. Horrendous heat capacity question. Awful volume questions. Tonnes of wordy question. Thank you aqa for changing the paper compared to previous years. Lets just hope the grade boundaries are low :smile:

Reply 1433

JamesSS95

Original post by Pinkhead

I got 8.4something Celsius for Tf and 0.013kg for the ice. Core section was harder than normal and Turning Points was easier than normal.

Agreed, I got 0.015kg

Posted from TSR Mobile

Reply 1434

AWithers95

I have no idea what moderator molecules emit when they are excited!!
Not sure what de Broglie's hypothesis was either....

Reply 1435

Snedss

1

put 15 and B+ decay which i think could be wrong
Got 8.4 for temp of water
0.016kg for mass of ice
around 130 mol for first amount of gas
3.5 mol for when its open
size of lense was 46cm (meant to about 50 so seemed right)
age of universe got 14.1b
about all i can remember

(edited 10 years ago)

Reply 1436

Jam Jam24

8

Original post by mrwho

Feeling good about nuclear now that I've got the same answers as everyone else for the hard ones. The only questions I've definitely got wrong is the definition of the atomic mass unit and what the neutrons do when they collide elastically. I've almost definitely lost at least 3 marks in the 6-markers too. But I don't think I've done badly enough to not get an A.

Anyoen remember their answers for applied? I can't, but any similar answers would hopefully ring a bell.

Whats the deifiniton of an atomic mass unit? We weren't taught about it. I just put the mass of a proton, which equates to 1.67x10^-27 but had no idea!!

Reply 1437

blahblahh

Original post by AWithers95

I have no idea what moderator molecules emit when they are excited!!
Not sure what de Broglie's hypothesis was either....

I put that they release photons which is gamma radiation ?
And i put that debrolgies hypothesis is that if waves can have particle like nature then particles can have wave like nature ?

Anyone know if this is right ?