Higher Physics 2018-19

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Oh yes my apologies! new screenshot attached. However I've gone and already worked it out, reasoning why I was struggling with this was because I forgot it was a continue on from the previous question!! Friction should be 350N IIRC? (F = ma = 290*5 = 1450N UNBALANCED FORCE, 1800-1450 = 350N)

Original post by sbneelu

Which paper is that? You need more information to solve that (either the unbalanced force or a way of finding the unbalanced force), can you send the rest of the question please?

(edited 4 years ago)

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Reply 81

sbneelu

Ah perfect. Yep, I got 350N too :smile:

Original post by PeadarKing

Reply 82

Labrador99

Volunteer Team

Hope the exam goes well tomorrow! :smile:

Reply 83

nat5dawg

When drawing a graph, and it's a curve of best fit - should you draw a line back to the origin or just leave the curve as it is? (Specimen Q16b)

Reply 84

tomctutor

The m'th order is used in the formula

m\lambda=dsin(\theta)

,
m=0 gives principle axis, m=1 (or m= -1) gives first bright line on screen etc,

for destructive interference

(m+\frac{1}{2} )\lambda=dsin(\theta)

m=0 gives first angle etc...

remember

\theta

is a function of

m

(edited 4 years ago)

Reply 85

a.nm_j

thank you! I did past papers over the past week and went over theory quite well. Let's just hope the paper tomorrow isn't too bad. Good luck everyone!

Original post by Aaron_0610

I'm a 2-year resit, from Nat 5, so I can't give you crash higher advice although considering I got 28% in the exam last year, I might be able to help.

Do past papers, if you can't do a question read how to do it, make notes on types you can't do. Go over main points, that they may ask in form of a long answer knowledge question. Understand it.

If you don't have the time over the next week just keep doing past papers.

This website provides (http://mrmackenzie.co.uk/higher-revision/), past papers back to 1994. Fun fact, SQA love to reuse multiple choice questions, if you try the majority of those multiple choice questions and memorise the answers/what to do, I can assure you you will bank 15/25 at least in the Multiple Choice, from either knowing how to do the questions or the exact same ones coming up. This means you go into Paper 2 with 20% odd of your marks already in the bag, plus the assignment.

Reply 86

ZBAD$

Hi what do magnetic and electric fields do to particles in particle accelerators? Which one deflects a particle and what happens to the other one

Reply 87

a.nm_j

A moving charge produces a magnetic fields and magnetic fields deflect particles - in particle accelerators, like the synchrotron, they use electromagnets to keep the particle in a circular path, and in the cyclotron, they use magnets as well to keep them going in a circle after they've been accelerated across the "dee". Electric fields exist around any charged object, so a charged particle in an electric field would experience a force and this force could make the particle accelerate. That's all I think we need to know, it's just stuff I learnt from my How to Pass book, hope it helps :smile:

Reply 88

tomctutor

Original post by ZBAD$

Hi what do magnetic and electric fields do to particles in particle accelerators? Which one deflects a particle and what happens to the other one

Some relationships:

E_w=QV

for energy of charged particle accelerated in an Electric Field (potential difference is

V

.) Final velocity will be

E_k = \frac{1}{2} mv^2

A magnetic Field cause charged particle to deflect (actually into a circular path ) where direction is given by Right-Hand-Rule:

Particle accelerators are Linear (like FERMIlab), cyclotron (aka bevatron) and synchrotron (like CERN)

Neutrons are unaffected by Electric or Magnetic fields- difficult to study.

(edited 4 years ago)

Reply 89

XZS

Best of luck everyone! Hope we all do great :smile:

Reply 90

username3779536

Good Luck everyone! Hopefully the SQA are kind with this paper.

Reply 91

sbneelu

Good luck everyone! :smile:

Reply 92

StuckInReverse

Exam went really well! Fair MC paper and excellent paper 2. I'll try and upload MC if I can :h:

Reply 93

StuckInReverse

Here's the MC paper with my answers and working. No guarantee that the answers are right although I did feel pretty confident about them. Interested to see if others got similar answers

Reply 94

AWildBoar

Original post by StuckInReverse

Here's the MC paper with my answers and working. No guarantee that the answers are right although I did feel pretty confident about them. Interested to see if others got similar answers

I think 4 should be A and 10 should be E

Reply 95

StuckInReverse

Reply 96

StuckInReverse

Quite possibly. They were two I was unsure about

Original post by AWildBoar

I think 4 should be A and 10 should be E

Reply 97

nat5dawg

17 should be C
24 should be B

Other than that we got the same answers :smile:

)

Reply 98

AWildBoar

Original post by nat5dawg

17 should be C
24 should be B

Other than that we got the same answers :smile:

)

Thank god im not the only one who put those down

Reply 99

StuckInReverse

Quick recap:
1 E, 2 B, 3 D, 4 D (possibly A), 5 B, 6 E, 7 B, 8 C, 9 B, 10 D (possibly E), 11 D, 12 A, 13 A, 14 C, 15 E, 16 C, 17 E (possibly C), 18 C, 19 D, 20 A, 21 B, 22 C, 23 D, 24 E (possibly B), 25 E