ATAR Notes: Forum
HSC Stuff => HSC Science Stuff => HSC Subjects + Help => HSC Physics => Topic started by: Iminschool on January 09, 2017, 12:45:35 am
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So i've been doing a few questions and have come across which i believe are errors in the solutions such as using the diameter in the (Pie.r^2) formula for the area of a circle instead of the radius.
Has anyone else stumbled across this problem?
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So i've been doing a few questions and have come across which i believe are errors in the solutions such as using the diameter in the (Pie.r^2) formula for the area of a circle instead of the radius.
Has anyone else stumbled across this problem?
I never ran into any major problems with Physics in Focus, but I didn't use it for practice questions all that often - I used it more for the content. In any case, remember as you study you are welcome to post any questions/answers that seem a little dubious up here and we'll run an eye over it for you! ;D
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I never ran into any major problems with Physics in Focus, but I didn't use it for practice questions all that often - I used it more for the content. In any case, remember as you study you are welcome to post any questions/answers that seem a little dubious up here and we'll run an eye over it for you! ;D
Awesome! Here's my first question:
My answer was 2.35×10^-9 N repulsion
Mod Edit: Post merge
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Awesome! Here's my first question:
My answer was 2.35×10^-9 N repulsion
Mod Edit: Post merge
On a quick scribble, I get \(5.88\times10^{-10} N\) repulsion, is that the textbooks answer? (maybe from now on attach your answers and the textbooks, that way if it's right I know, and if it's wrong I can try and figure out why) :)
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Crap, just realised that in my solution i accidentally wrote for current 1 and 2 as (50x10^-3 × 2) instead of (50x10^-3)^2
Edit: Answer becomes 5.88 × 10^-10 N repulsion so yea we get the same answer
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Crap, just realised that in my solution i accidentally wrote for current 1 and 2 as (50x10^-3 × 2) instead of (50x10^-3)^2
Edit: Answer becomes 5.88 × 10^-10 N repulsion so yea we get the same answer
Awesome! ;D I used to screw that up a lot too actually, nice spot :)
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Gonna input on original question
I do recall a small amount of hiccups somewhere in their answers. But they were quite rare tbh and in general the answers are very reliable
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Gonna input on original question
I do recall a small amount of hiccups somewhere in their answers. But they were quite rare tbh and in general the answers are very reliable
Better than nothing I guess. I'll just have to ask around if i'm not sure about the given solutions.
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Better than nothing I guess. I'll just have to ask around if i'm not sure about the given solutions.
Just come to us; we'll lend a hand :) or cross reference with your classmates, that was always my first step if I was skeptical of a textbook answer (though I did it for Maths way more than Physics) :)
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Just come to us; we'll lend a hand :)
Haha, thanks for the support