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March 29, 2024, 12:56:14 pm

Author Topic: VCE Physics Question Thread!  (Read 603434 times)  Share 

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maurlock

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Re: VCE Physics Question Thread!
« Reply #660 on: October 20, 2014, 10:31:43 pm »
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Thanks so much both of you, this makes perfect sense to me now!

Brunette15

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Re: VCE Physics Question Thread!
« Reply #661 on: October 22, 2014, 07:20:48 pm »
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Can someone please help me with part ii to this question from the 2007 exam 2?
I understand the method to work it out but i always get confused when the resistance illustrated is the total resistance or you have to add it? How do i know what the total resistance is for these types of questions?
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Zealous

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Re: VCE Physics Question Thread!
« Reply #662 on: October 22, 2014, 08:30:42 pm »
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Can someone please help me with part ii to this question from the 2007 exam 2?
I understand the method to work it out but i always get confused when the resistance illustrated is the total resistance or you have to add it? How do i know what the total resistance is for these types of questions?

Maybe it will help to imagine the resistance of the wires as constant resistors in a circuit. In this case, we can imagine the resistance of the cables to be 2x2 ohm resistors for a total of 4 ohms resistance in the circuit. As V=IR, the voltage drop across the resistance of the wire will be V=0.5x4=2. The remaining 10V (12-2) will be across the voltmeter V1.
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knightrider

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Re: VCE Physics Question Thread!
« Reply #663 on: October 22, 2014, 09:15:39 pm »
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Can someone please help. How would you do these questions?

myanacondadont

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Re: VCE Physics Question Thread!
« Reply #664 on: October 23, 2014, 09:22:08 am »
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hey I was wondering whether pn junctions and those type of things are in our study design. I remember my teaching doing something brief on them mid-year but every practice exam I've done I've not witnessed anything to do with them. Theyre also in my textbook - n and p type semiconductors and all that stuff.

faredcarsking123

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Re: VCE Physics Question Thread!
« Reply #665 on: October 23, 2014, 02:46:11 pm »
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hey I was wondering whether pn junctions and those type of things are in our study design. I remember my teaching doing something brief on them mid-year but every practice exam I've done I've not witnessed anything to do with them. Theyre also in my textbook - n and p type semiconductors and all that stuff.

No they aren't.

bts

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Re: VCE Physics Question Thread!
« Reply #666 on: October 24, 2014, 08:49:02 am »
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In the textbook under the section about banked curves what does it mean when they say: at speed below the design car speed (speed that allows the car to travel without friction? Huh?) the car will experience a force point down the bank and at speeds above the design speed the car will experience a force pointing up the bank?
Thanks in advance :)

allstar

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Re: VCE Physics Question Thread!
« Reply #667 on: October 24, 2014, 11:35:50 am »
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Can someone please help me with this question.
Whats the difference between elastic and isolated systems?

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Re: VCE Physics Question Thread!
« Reply #668 on: October 24, 2014, 08:19:09 pm »
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Can someone please help me with this question.
Whats the difference between elastic and isolated systems?

Isolated = no external forces
Elastic systems? I haven't heard that term used. If you mean elastic as in collisions, you can have an isolated system in which collisions are not elastic, namely that of light and matter, or a collision that involves heat transfer. Friction can still act in an isolated system.
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myanacondadont

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Re: VCE Physics Question Thread!
« Reply #669 on: October 24, 2014, 08:23:18 pm »
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Isolated = no external forces
Elastic systems? I haven't heard that term used. If you mean elastic as in collisions, you can have an isolated system in which collisions are not elastic, namely that of light and matter, or a collision that involves heat transfer. Friction can still act in an isolated system.
Yeah I think he means elastic collisions. Elastic collisions (in terms of physics 3&4) are collisions in which no kinetic energy is lost. (Ek(initial) = Ek(final)). And then inelastic is when kinetic energy is lost.

speedy

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Re: VCE Physics Question Thread!
« Reply #670 on: October 29, 2014, 07:49:13 pm »
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This is a stupidly simple question, but I've got myself confused, when you find the 'direction' of a projectile, which angle to you take?
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Thorium

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Re: VCE Physics Question Thread!
« Reply #671 on: October 29, 2014, 07:56:39 pm »
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This is a stupidly simple question, but I've got myself confused, when you find the 'direction' of a projectile, which angle to you take?

Usually when the object is moving up or down, we take the acute angle that the direction has with the horizontal.

Hope that makes sense, and best of luck with the exams.
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speedy

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Re: VCE Physics Question Thread!
« Reply #672 on: October 29, 2014, 11:10:11 pm »
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Usually when the object is moving up or down, we take the acute angle that the direction has with the horizontal.

Hope that makes sense, and best of luck with the exams.

Alright thanks :)




Resistance here is ~19kOhm right?
Spoiler

Answers says it is 1kOhm
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silverpixeli

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Re: VCE Physics Question Thread!
« Reply #673 on: October 30, 2014, 01:04:30 pm »
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Resistance here is ~19kOhm right?

Answers says it is 1kOhm

careful of the scale of the illumination axis, the question gives you but the graph is in

but yeah if it was the point you thought, you are reading the graph correctly and ~19 would have been correct
« Last Edit: October 30, 2014, 01:06:45 pm by silverpixeli »
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speedy

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Re: VCE Physics Question Thread!
« Reply #674 on: October 30, 2014, 01:59:33 pm »
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careful of the scale of the illumination axis, the question gives you but the graph is in

but yeah if it was the point you thought, you are reading the graph correctly and ~19 would have been correct

Oh ffs lol, thanks a lot :)
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