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Hey for the dot point: analyse secondary information to identify the difficulties with the Rutherford-Bohr model, including its inability to completely explain: –the spectra of larger atoms –the relative intensity of spectral lines –the existence of hyperfine spectral lines –the Zeeman...

for the STANSW question , since the rod is always at right angles to the magnetic field, then from the sin@ in the magnetic flux equation (flux=BAsin@) there is always a max magnetic flux? and how i learnt EMF was to take the -ve derivative (so we are looking for negative gradient) of the...

Hey Xayma, or anyone else, can you help out i tried the more mathematical approach here: http://www.boredofstudies.org/community/showthread.php?t=47506&page=2 Thanks

and as its going up, its the kinetic energy changing to GPE

u fire the bullet and work must be done on the bullet to move it away from the earths graviational field, so u give it energy so id say the energy was varying. Acceleration is constant.

ok ill raise the question again :'(

i challenge thee.

Bump ^^ Thanks if anyone could help

little qquestion: In the dot point section "2" of I2I, whats the diff between identify einstteins contribution.....and the other one in the other colums "assess eintstein's contribution...."

LOL @ mojako. Here is something for u bored people. In the dot point section "2" of I2I, whats the diff between identify einstteins contribution.....and the other one in the other colums "assess eintstein's contribution...."

just say he reflected the generated waves off a metal surface and measured the wavelength of the standing waves set up by interference. by substituting this wavelength and the known frequency of the wave generator into the wave equation v=f.lambda, hertz was able to calculate the speed of the...

how do you mean all the fields switch ?

for the STANSW question , since the rod is always at right angles to the magnetic field, then from the sin@ in the magnetic flux equation (flux=BAsin@) there is always a max magnetic flux? and how i learnt EMF was to take the -ve derivative (so we are looking for negative gradient) of the...

anyone wanna tell me what how to derive when its going down

though it means the rotor must rotate at the same frequency as the ac current. coz i was thinking like if u just turned it on then in the first few split seconds the polarity would already be changing and hence the forces acting on the sides would keep alternating. But i just read ac electric...

Why do ac electric motors still work even though the current is constantly changing polarity?

is it ok just to talk about moving a bar magnet relative to a solenoid? he also did that but i dot think it was the actual experiment where he discovered EM induction ?

got it, thanks xayma

Ok then from this, if the positive charges leave from the positive terminal and travel towards the negative end, then since the force on the charges is from L to K the charges are travelling then to the more negative end, which is terminal B? In contrast with the suggested answer that terminal B...

thanks Jase just quickly, i remember reading somewhere ages ago that if u got +ve and -ve terminals conven. current flows from + to - but the actual charges travel from electrons to the positive charges. so if its travelling from the electrons then electrons go out of the + terminal. im prolly...