Physics predictions? (1 Viewer)

[Cliiton]

Easy as
View attachment 36812

nah the other way

 

[yanujw]

Derive E=mc^2 (1 mark)

Assume the result is true.

Multiplying both sides by a factor of 0 yields

which is evidently true
Thus, the assumption is true

 

[Vall]

Let P(n) be the given proposition
Prove P(1) is true
1 = 1(1)^2
∴ P(1) is true

Assume P(k) is true
E = mk^2
Prove P(k+1) is true
RTP: E = m(k+1)^2
∵ trivial and left as an exercise to the reader
∴ P(k+1) is true

∴ By proof by mathematical induction, P(n) is true for all real n
∴ E = mc^2

 

[jklol]

Let P(n) be the given proposition
Prove P(1) is true
1 = 1(1)^2
∴ P(1) is true

Assume P(k) is true
E = mk^2
Prove P(k+1) is true
RTP: E = m(k+1)^2
∵ trivial and left as an exercise to the reader
∴ P(k+1) is true

∴ By proof by mathematical induction, P(n) is true for all real n
∴ E = mc^2

NAHHH FRRR

 

[Vall]

NAHHH FRRR

yea bro, this is confirmed in the phys exam

 

[Shirotc1]

The test is gonna be F'ed up for sure, however, ig if you are able to get a decent raw mark that's above 75, your aligned mark will probs be a band 5 or 6 externally

 

[chilli 412]

 

[ExtremelyBoredUser]

Analyse the physics in indian movies applying both classical and quantum models (10 marks)

 

[yanujw]

Analyse the physics in indian movies applying both classical and quantum models (10 marks)

You would have to neglect the force of air resistance and friction... and gravity... and the constancy of time.

 

[demdoo1]

Hoping for heavy mod6&7 i dont want to see another projectile motion graph pls

 

[MJRey]

I don't mind the questions on the progression of Physics discoveries and technology over the years, so hopefully they keep up the trend.

 

[Yousef El-Omar]

Ik this is probably way too easy for you guys but could anyone explain this question with working out? Thanks.

 

[tgone]

View attachment 36839Ik this is probably way too easy for you guys but could anyone explain this question with working out? Thanks.

Thought process:
1. Since the transformers are ideal, power is constant throughout the circuit.
2. The load circuit tells us that P=VI=5*24=120W
3. Vp/Vs = Np/Ns ==> 240/Vs = 1000/500 = 2 ==> Vs=120V
4. P=VI, I=P/V=120/120=1.0A

So C.

LMK if i'm wrong, haven't looked at this content for a while cramming for chemistry rn haha

 

[Run hard@thehsc]

Thought process:
1. Since the transformers are ideal, power is constant throughout the circuit.
2. The load circuit tells us that P=VI=5*24=120A
3. Vp/Vs = Np/Ns ==> 240/Vs = 1000/500 = 2 ==> Vs=120V
4. P=VI, I=P/V=120/120=1.0A

So C.

LMK if i'm wrong, haven't looked at this content for a while cramming for chemistry rn haha

seems right

 

[Yousef El-Omar]

Thought process:
1. Since the transformers are ideal, power is constant throughout the circuit.
2. The load circuit tells us that P=VI=5*24=120A
3. Vp/Vs = Np/Ns ==> 240/Vs = 1000/500 = 2 ==> Vs=120V
4. P=VI, I=P/V=120/120=1.0A

So C.

LMK if i'm wrong, haven't looked at this content for a while cramming for chemistry rn haha

You are very much correct my friend thank you! I didn't think of using P=VI so I guess I need more practice with that haha. Good luck for chemistry!

 

[tgone]

You are very much correct my friend thank you! I didn't think of using P=VI so I guess I need more practice with that haha. Good luck for chemistry!

No problem- for questions like these if you're getting a brain freeze just take a look at the reference sheet for a refresher, it has VpIp=VsIs on it which may have been useful.

Edit: An interesting thing to post on the predictions thread, lmao

 

[Yousef El-Omar]

No problem- for questions like these if you're getting a brain freeze just take a look at the reference sheet for a refresher, it has VpIp=VsIs on it which may have been useful.

Edit: An interesting thing to post on the predictions thread, lmao

Yeah there was only a predictions thread so just thought I'd post it in here lol. I was just going through the additional sample questions and thought I'd get a quick answer in here.

 

[tgone]

Yeah there was only a predictions thread so just thought I'd post it in here lol. I was just going through the additional sample questions and thought I'd get a quick answer in here.

fair enough, don't think any of us would complain at a quick revision question anyway

 

[notme123]

I saw this post on facebook which is likely fake cuz it was an anonymous post but interesting to think about:
"Close family friend is on NESA physics examiner board. Warned me that there will be a big emphasis on module 5 this year. 2 9 markers: one on satellites, one on a racing circuit with analysis of forces. "

bio had a lot of heavy markers this year and all the sciences usually follow each other in terms of examination style each year. this post came after the bio exam so no guarantees

 

[yanujw]

Warned me that there will be a big emphasis on module 5 this year. 2 9 markers: one on satellites, one on a racing circuit with analysis of forces.

Interesting use of the word 'warned'. Compared to the rest of the syllabus, this is actually a pretty good deal for the long responses.