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They say the answer is C: But in R, there is still generation of eddy currents meaning it should drop before the plastic ring nonetheless. The answer should be B. Eddy currents may not be as effective as Q, but still existent.

If the current travels to the right, that means electrons travel to the left right? Is that the justification for answer B? If it's too small: http://puu.sh/1lgYG

I don't think you need to know that in that much depth. Transistors/Switches replaced thermionic devices in order to improve communication. Thermionic devices lacked durability, were unreliable, had a high start-up time, heavy and did not last long whatsoever. The invention of transistors saw...

Oh please Boardofstudies have mercy on us, don't ask us to find mass-defect/binding energy.

I can't wait for this subject to be out of my life.

Thank you!

I had that before, but Wikipedia said group 5 elements weren't those, ffs so I was right, haha thanks mate!

I don't understand, you could reiterate that differently?

How do we know which ones are which? Help?

Discuss Pauli’s suggestion of the existence of the neutrino and relate it to the need to account for the energy distribution of electrons emitted in beta decay I understand a majority (if not all) of Quanta to Quarks, but have significant trouble with this one. I got 19/25 in my trial exam...

Re: I know both these degrees are "shiz" in terms of job prospects, which one is bett At least you're not doing Forensic science.

Scum bag BoS.

Why is the answer B not C? Just wondering.

Good luck everyone struggling.

I don't know where you read that, but Thompson was able to deflect cathode rays with both magnetic and electric fields. Light does have mass (not stationary mass though) as photons contain energy, so theoretically it can push a paddle wheel, although you cannot deflect it. Therefore it's B.

65 in MH is MUCH higher than a 30 atar. If you're scoring 60s and 65s in your exam, you're looking at a 60-70.

That's not your school rank fault, that's YOUR fault for being ranked 20th. School rank is irrelevant. If that same student was to even attempt to go to JRAHS, they wouldn't even be accepted, and if he was to go to a random higher ranked school, they'd receive an even lower internal ranking...

Nope, at x=0 you can have y=n (n being any number). In other words, at x=0 you can have any value for y no matter what, so it doesn't need to be through the origin. Your line of best fit also doesn't need to be through the origin.

Aren't geostationary satellites 36000km above the Earth?

The gravitational potential energy is always negative as it is the energy required to move an object from an infinite/very far distance to the point of the gravitational source (0). As it moves closer, the GPE increases to 0, not decreases. - I hope that's concise enough.