Physics Predictions/Thoughts (1 Viewer)

[Alamjot]

Btw for the rotational velocity for the hydrogen specta, did y'all just talk about red-shift and blue shift

 

[Interdice]

I just think 2022 theory questions were free cos the questions were so easy to understand and required simple answers, but this one a lot of easy calculations I guess

No I thought the theory for this one wasn't too bad. But maybe that's because I enjoyed stars and they asked a lot about them. My friend also thought this one was "way easier".

 

[Interdice]

Btw for the rotational velocity for the hydrogen specta, did y'all just talk about red-shift and blue shift

No. Because that is transitional velocity. That's the one where the line becomes thicker

 

[Rattlehead15]

Btw for the rotational velocity for the hydrogen specta, did y'all just talk about red-shift and blue shift

Yes. And I just made the line they gave thicker. Also for when they asked about what qualities of the star make it luminous did anyone say mass and temperature?

 

[_DidntStudyForEnglish]

Is the launcher 4 m from the initial position though? I got like 183 deg rotated, not 180 deg rotated.
(So it had rotated up to the top plus a little)

Im pretty sure it was 4 because in the time for the ball to land the disc rotated 3.5 times since half a rotation is peak of the disc it is 2x radius which equals 4m

 

[jackarana]

Yes. And I just made the line they gave thicker. Also for when they asked about what qualities of the star make it luminous did anyone say mass and temperature?

yes , i said mass and temperature

 

[Rattlehead15]

No. Because that is transitional velocity. That's the one where the line becomes thicker

Yeah but one side of the star is red shifted since it is spinning away and the other side of the star is blue shifted since it is spinning towards earth

 

[Interdice]

Yes. And I just made the line they gave thicker. Also for when they asked about what qualities of the star make it luminous did anyone say mass and temperature?

Okay maybe I'm retarded, but isn't red and blue shifting when it gets further away, not rotating?

 

[Interdice]

Yeah but one side of the star is red shifted since it is spinning away and the other side of the star is blue shifted since it is spinning towards earth

I stand corrected

 

[Rattlehead15]

Im pretty sure it was 4 because in the time for the ball to land the disc rotated 3.5 times since half a rotation is peak of the disc it is 2x radius which equals 4m

I got time = 1.17 or 1.71 seconds or smth. And freq is 3 so 3*time*360deg and it did not equal an interval of 180 unless I did smth wrong

 

[_DidntStudyForEnglish]

Im pretty sure it was 4 because in the time for the ball to land the disc rotated 3.5 times since half a rotation is peak of the disc it is 2x radius which equals 4m

Sorry it was like 3.5001 or something which i think that 0.0001 is not important but if it is i guess i loose 2 marks for that question

 

[jackarana]

what do you think the cut off for band 6 will be , and is there a valid argument that when they said launched vertically upwards , it could have interpreted as being the net effect launching in the opposite direction hence vertical rectilinear

 

[Rattlehead15]

Sorry it was like 3.5001 or something which i think that 0.0001 is not important but if it is i guess i loose 2 marks for that question

Ok I think I messed up because mine was like a few degrees off, not just 0.001

 

[Sam14113]

No it still has an emf induced, just the current can’t flow so there isn’t any current

Was there a spark gap Hertz-like effect?

 

[Alamjot]

I stand corrected

ur right, I did write about both tho, just hope they don't mark down cos of it

 

[carrotsss]

multiple choice solutions (from sigma science)

1. D
2. C
3. C
4. B
5. D
6. D
7. C
8. B
9. A
10. D
11. A
12. B
13. C
14. C
15. A
16. C
17. B
18. A
19. B
20. D

 

[_DidntStudyForEnglish]

Ok I think I messed up because mine was like a few degrees off, not just 0.001

I cant quite remember the time but instead of doing a formula i just divided 1/3 by the tim(1.something) and got close to 3.5 rotations so i just rounded

 

[Rattlehead15]

I cant quite remember the time but instead of doing a formula i just divided 1/3 by the tim(1.something) and got close to 3.5 rotations so i just rounded

Yea that probably sounds right I did a longer way with angular velocity and stuff that was probably not needed

 

[Alamjot]

multiple choice solutions (from sigma science)

1. D
2. C
3. C
4. B
5. D
6. D
7. C
8. B
9. A
10. D
11. A
12. B
13. C
14. C
15. A
16. C
17. B
18. A
19. B
20. D

u got paper?

 

[Cathode_RT]

multiple choice solutions (from sigma science)

1. D
2. C
3. C
4. B
5. D
6. D
7. C
8. B
9. A
10. D
11. A
12. B
13. C
14. C
15. A
16. C
17. B
18. A
19. B
20. D

20 was D? wouldnt it be C?