The Solenoid onesame
and how the hell do you draw the graph?
I didnt think it was easy but it wasnt hard as contraditory as that sounds.^ that seems like it would be somewhat right
man im happy I did the 2009 one and didnt have to do that one, but I know someone that did the 2010 physics paper and said it was really easy, so im a tad confused, I think maybe he just screwed everything up and didnt realise it
Wouldnt it flip because when the magnet is a north it induces an anticlockwise current to form a north pole at the top of the solenoid, and when the magnet is a south with will induce a clockwise current to form a south pole at the top of the solenoid. (According to Lenzs Law? and the right hand grip rule)ummmmm. i did what you guys did ^^ for the solenoid one...THEN I HAD A MAJOR FUCKING EPIPHANY THAT SAME NIGHT........the graph moves to the right and the amplitude increases , but the graph stays the same ( NO FLIP) ....what determines the direction of current is regardless of which side of the magnet drops ....thaats just my logicality....even though i immensely fucked up
It would only be an unfair advantage if both of those questions had dotpoints within the Astrophysics Syllabus. Otherwise it would be a fluke and he was lucky to get those questions.IIRC langrange points are not a part of the HSC syllabus and i have no clue as to why our knowledge on them was tested. Similar story for the 8 marker.
Friend of mine who has a keen interest in astrophysics said he has read all about the these two areas said he's confident he will get full marks. Unfair advantage?
this was such a bad question imo. poorly explained. the way they describe it in the question makes it impossible to answer (with or without slingshot effect)...and i know this is what the question was getting at by saying use kepplers laws to show how the doesnt make sense but researching it, the JWST travels in an elliptical orbit and the question makes out like it travels in a circular orbit.Q24 is the slingshot effect.
ie. Indeed it appear that Kepler's laws are being violated as r^3/T^2 is a constant value and 'r' is greater for the JWST. But JWST orbits near the Earth and so experiences gravitational attraction towards the Earth (as Earth has a much greater mass than the JWST). So it orbits with the same period as the Earth.
Good question. I like it. A good novice seperator.