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November 16, 2019, 12:17:25 am

Author Topic: VCE Physics Question Thread!  (Read 259944 times)  Share 

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qldpc

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Re: VCE Physics Question Thread!
« Reply #2310 on: October 15, 2019, 11:29:21 pm »
+2
While this thread is here to answer queries you have about physics, it's important that you do have a go at the question first and let us know what specifically you are finding difficult with the question such that we can give specific advice to better help you.
Also note that, when asking questions, you shouldn't be demanding, and while perhaps not your intention, you should keep in mind noone is obliged you answer you're question. You're formatting of that post is also a bit unnecessary.

That being said, I would recommend turning this information into a diagram. You will also want to break up the problem into vertical and horizontal components.

Hey Erutepa,
Yeah, I completely understand where you're coming from. I've been struggling with this question for the past two days and it was stressing me out like crazy. Like an idiot, I jumped on here and typed in the question. 100% I should have explained how I was tackling the question and what was causing me issues. Also, I agree with the fact that the post was aggressive and demanding, my apologies for not giving any thought to my post. Obviously no one is obliged to answer the question and looking back, the post was so overkill.
Cheers for pointing all of this out. I'll definitely take these comments on board if I ever post in a question thread again.

With regard to the question, I did end up solving it :) Like you said, a diagram is key to this question and allows the isolation of the components.
Thanks again
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qldpc

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Re: VCE Physics Question Thread!
« Reply #2311 on: October 15, 2019, 11:31:19 pm »
0
Could you please give us an image of your working out? That way we can instantly see what you know and don't know which makes it much easier for us to help.

I did end up solving it  :) Thanks for offering to help though.
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stewartw20

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Re: VCE Physics Question Thread!
« Reply #2312 on: October 17, 2019, 03:55:07 pm »
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October 17, 2019, 03:55:07 pm - Hidden.
« Last Edit: October 19, 2019, 09:27:23 pm by insanipi »

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Re: VCE Physics Question Thread!
« Reply #2313 on: October 17, 2019, 05:09:42 pm »
+8
URGENT HELP REQUIRED, PLEASE SOLVE THIS QUESTION NOW!
Guys please help I need this answered ASAP!!!

It should be noted that forum etiquette requires users to respect each other and realise that all question-answerers on ATAR Notes are volunteers, as was stated in a very recent post above. Exam time means extra stress but by no means does being stressed give a person the right to demand what they need from others, especially if those others are answering queries out of the goodness of their hearts. I wanted to make it clear that this attitude will not be tolerated here and that, regardless of individual circumstances, everyone deserves respect. Bold red does not equate to respect.
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stewartw20

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Re: VCE Physics Question Thread!
« Reply #2314 on: October 18, 2019, 10:31:00 am »
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Just another student

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Re: VCE Physics Question Thread!
« Reply #2315 on: October 21, 2019, 03:52:53 pm »
0
Hi all,

Is there any sig fig rules for physics like there is for chem? like do we need to round to lowest number of sig figs? thanks

Tau

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Re: VCE Physics Question Thread!
« Reply #2316 on: October 21, 2019, 04:05:53 pm »
+4
Hi all,

Is there any sig fig rules for physics like there is for chem? like do we need to round to lowest number of sig figs? thanks

There was a video overview of the 2017 exam by the Physics Chief Examiner in 2017. From what he said they’ll no longer really take off marks for significant figures, unless the question stipulates it (which one did in 2018). Just ensure you work to a reasonable level of accuracy and quote your answer to an appropriate level. They shouldn’t take off marks unless asked for in a specific form.
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studyingg

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Re: VCE Physics Question Thread!
« Reply #2317 on: November 09, 2019, 10:50:02 am »
0
Could someone please explain why the flight time is the same? Thanks :)
« Last Edit: November 09, 2019, 11:12:42 am by studyingg »

Ninjamagics

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Re: VCE Physics Question Thread!
« Reply #2318 on: November 09, 2019, 04:31:43 pm »
0
hopefully 1 of u amazing individuals gets back to me in time,
Q1) when can you use power loss to find power
Q2) referring to the vcaa 2017 Q4 b attached question, why is Rt not Rp+Rc

studyingg

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Re: VCE Physics Question Thread!
« Reply #2319 on: November 09, 2019, 05:17:57 pm »
0
hopefully 1 of u amazing individuals gets back to me in time,
Q1) when can you use power loss to find power
Q2) referring to the vcaa 2017 Q4 b attached question, why is Rt not Rp+Rc
Q1/ Not sure how to answer this without a specific question...sorry :)
Q2/ Because the radius of orbit accounts for the distance between Pluto and Charon; if you were to add the radius of Pluto with that of Charon you would be falsely assuming that there is no distance between these planets. Drawing a diagram helps.

3086

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Re: VCE Physics Question Thread!
« Reply #2320 on: November 10, 2019, 05:12:41 pm »
+5
hopefully 1 of u amazing individuals gets back to me in time,
Q1) when can you use power loss to find power
Q2) referring to the vcaa 2017 Q4 b attached question, why is Rt not Rp+Rc

You cannot use power loss to directly find power however power loss can be used to determine how much power has reached our desired destination (for example to light a globe at our house). This can be done by subtracting the power loss from the initial power supplied. Another way in which power loss can indirectly help us calculate power is if we add it to the power at our destination. This will help us determine the power we started with ie the supply power.
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3086

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Re: VCE Physics Question Thread!
« Reply #2321 on: November 10, 2019, 08:02:25 pm »
+4
Three useful tips for power transformation questions:
-The current throughout the system remains constant (except when transformers are in use)
-For transformers a step up transformer requires simple multiplication of the most simplified ratio (ie if it is 12:240 the most simplified would be 1:20, so you would multiply by 20) and for step down you divide by the most simplified ratio (so divide by 20)
-To calculate the voltage at the desired location when transformers are involved, simply use the following equation:

Vdesired=(VsupplyxT1-IlinexRline/T2

For example: Vsupply=400 V
                      T1 and T2 are 1:5 and 5:1 respectively
                       I is 2 Amps and R is 5 Ohms

Then: 400x5-2x4/5 = 398 V as what we recieve (V desired)
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Re: VCE Physics Question Thread!
« Reply #2322 on: November 10, 2019, 08:33:30 pm »
+2
Could someone please explain why the flight time is the same? Thanks :)

In this case the flight path is symmetrical and you can find the time of flight for the second half using initial vertical velocity of 0, the vertical displacement & acceleration due to gravity. These 3 factors are the same both times the paintball is fired
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Matthew_Whelan

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Re: VCE Physics Question Thread!
« Reply #2323 on: November 11, 2019, 02:01:48 pm »
0
I know this is late but do we have to know about Circuitry (resistors in series and parallel)? It is on the formula sheet and on the itute ones but isn't on the study design from what I've seen. I presume we don't have to but just double checking last second   ;D
(I know power transmission is necessary to know)
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