HSC Physics Predictions / Thoughts (3 Viewers)

[S12345B]

question 8 was surely alpha decay right? did u guys put Pa-230 or Th-230

 

[Speed’o’sound Sonic]

Magnitude shouldn't be constant? Ball slows down as it moves up so normal force changes?

Iont know man, that’s what I got but I’m not too sure. Back yourself over what I got

 

[Speed’o’sound Sonic]

question 8 was surely alpha decay right? did u guys put Pa-230 or Th-230

It was Th if you looked at Axis it gave atomic number then u could look at periodic table

 

[Xanthi]

Iont know man, that’s what I got but I’m not too sure. Back yourself over what I got

As in mv^2/r=N and as v decreases N decreases?

 

[Marshall17]

I think the centripetal force is the sum of gravity and normal and is constant?

 

[Speed’o’sound Sonic]

As in mv^2/r=N and as v decreases N decreases?

I think the centripetal force is the sum of gravity and normal and is constant?

I don’t really know guys. Sorry but I’m feeling kind of tired, gonna check out for the night. Good job for today everyone, I’m proud of us for getting though it!

 

[ItzZoni]

Man, I've gotten a headache thinking about physics. Just gonna focus on chem now and forget it

 

[Marshall17]

I think the centripetal force is the sum of gravity and normal and is constant?

But wait if there's gravity downwards it's not uniform circular motion??

 

[Marshall17]

But wait if there's gravity downwards it's not uniform circular motion??

No it still is because of normal force, ok i think it's A

 

[Xanthi]

I don’t really know guys. Sorry but I’m feeling kind of tired, gonna check out for the night. Good job for today everyone, I’m proud of us for getting though it!

I've got to agree. Many things I could have done better today, I'm not too sure on some of these either, so don't worry about it.

Good job all, sure we've all done the best we can.

 

[homeworkatedog]

Nuclear forces hold the quarks together doe

oh yeah gluons do i meant z and w

 

[homeworkatedog]

Chose cosine I think.

all i remember is that uh emf is the negative derivative of flux
i said A but who knows

 

[homeworkatedog]

From what I've heard A is a common answer. I did D though sadly

its a dumb question. speaking VERY specifically youd be right bc the ball is further away from earth's centre at the top therefore less grav force... thats where i had to choose b/w d and a, i said a

 

[wizzkids]

2020 HSC Physics
Multiple Choice Answers
1 - D, 2 - A or D both correct, 3 - C, 4 - B, 5 - B, 6 - A, 7 - D, 8 - C, 9 - A, 10 - B, 11 - C, 12 - D, 13 - A, 14 - C, 15 - D, 16 - A, 17 - D, 18 - B, 19 - A, 20 - A

It will be interesting to see what the head of marking decides to do about Q.2 They must give a mark to either A or D.

 

[homeworkatedog]

night fellas, congrats to those who finished and to those who didnt, we're almost there. ultimately i think we will all be p happy once its all over

 

[homeworkatedog]

2020 HSC Physics
Multiple Choice Answers
1 - D, 2 - A or D both correct, 3 - C, 4 - B, 5 - B, 6 - A, 7 - D, 8 - C, 9 - A, 10 - B, 11 - C, 12 - D, 13 - A, 14 - C, 15 - D, 16 - A, 17 - D, 18 - B, 19 - A, 20 - A

It will be interesting to see what the head of marking decides to do about Q.2 They must give a mark to either A or D.

whered u find this?

 

[wizzkids]

I am a Physics teacher.

 

[Speed’o’sound Sonic]

I am a Physics teacher.

Damnn respect. what school?

 

[homeworkatedog]

I am a Physics teacher.

aw, thanks for the contribution! where do u guys find the answers for the rest of it, or will it just come out more organically?

 

[wizzkids]

If I have time I will post some more answers. Here is a sample ...
---
Question 25. Describe the hydrogen atom in terms of the Standard Model of matter. (4 marks)
----
The hydrogen atom consists of one proton ( a hadron composed of three quarks and carrying one unit of positive charge) and one electron (a lepton carrying one unit of negative charge). The proton is not fundamental, it has a quark composition of u,u,d . The electron is fundamental, and it has never been observed to decay into any smaller units. Both the electron and the proton have a net magnetic moment, hence they have spin. The spin of the proton and the electron are both h-bar/2 or spin-1/2, so they both obey the Pauli Exclusion Principle. (that should be enough to get you 4 marks). The electron and the proton in the hydrogen atom are bound by the electromagnetic force, and hence they exchange virtual photons, the photon being the force-carrying particle (boson) that mediates the electromagnetic force. The quarks in the proton are bound by the gluon field, and hence the u,u,d quarks are exchanging virtual gluons (bosons).