Recent content by XtremePhysX

I'm starting my science degree next year and was thinking about doing physics and specialising in superconductivity for post graduate studies. Will do the bachelor first and then decide :)

What's the possibility of developing a superconductor that is superconductive at room temperature? Developing such superconductor would be a very significant scientific advancement and will certainly change out lives.

I'm not against conceptual questions as long as they are difficult. I says I don't like easy, time consuming, questions like drawing a graph that's worth 6 marks and then lose a bunch of marks for silly mistakes. Hard questions are better since they test you understanding and intelligence so it...

I absolutely hate this! Happens in chemistry. Some people just rote learn everything and learn techniques to get "top marks" it is like cheap tricks etc... I think high school exams should not be a measure of you "exam techniques" but a measure of how smart and hard working you are. Fore...

LOL They hand out a formula sheet here too, but it doesn't cover all formulae I think, I never use it to be honest. The one you posted covers almost everything you need. Mathematics isn't a compulsory course is Australia, only English is compulsory so I think that's why they increase the amount...

v\frac{dv}{dx}=-g-g\frac{v^{2}}{V_{t}^{2}}

I think once I get part the second part, which is the acceleration, the part after that is just changing the acceleration to vdv/dx and integrating. But how do I get (iii) ? the acceleration?

mkV_{t}^{2}=mg therefore kV_{t}^{2}=g ?

LOL I think that's why we aren't required to know the derivation, because it doesn't exist :P

I think this is how they derived it: E_{n}=\frac{1}{n^{2}}E_{1} Hence we have: \Delta E=hf=E_{i}-E_{f} hf=\frac{1}{(n_{i})^{2}}E_{1}-\frac{1}{(n_{f})^{2}}E_{1} as f=\frac{c}{\lambda } therefore: \frac{1}{\lambda }=R\left ( \frac{1}{n_{f}^{2}}-\frac{1}{n_{i}^{2}} \right ) It has a lot of...

Yes, that's Bohr's equation I think. I had a looks at Maxwell's Equations on Wikipedia the other day and they look really complicated, wish we studies those too :P Quantum Mechanics is my favourite topic and luckily we spend 50% of the course on Quantum Mechanics, 25% on motion and %25 on...

We just have to memorize formulae, we aren't even required to know the derivation. For example, we are just required to substitute given values into \frac{1}{\lambda }=R\left ( \frac{1}{n_{f}^{2}}-\frac{1}{n_{i}^{2}} \right ) we are not required to know the derivation at all. And that it...

So how do I do part (i) ?

Can you explain to me the concept of terminal velocity please ?

Homework Statement http://i.imgur.com/kK7xE.jpg Homework Equations In the picture. The Attempt at a Solution I tried to find the acceleration by doing ma=mg-mkv^2.