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(a) for potential energy use e=-GM1M2/r (b) since they tell u that escape velovity is where the KE=PE then u use M1v^2/2 = -(-GM1M2/r) since KE is equal but opposite in direction a gain in KE is a loss in PE Then manipulate the eqn to get escape velocity= sqr root of 2GM2/r now that u noe...

The only thing that seems wrong in the mathematical process is we are taking 10g as the rest mass. But if u consider the rest mass as 2.5kg and the rest energy as 2.5kg*c^2=rest Energy and the change in mass in 10g so the new energy of the new mass is given by E=(2.5-0.01)kg*c^2 there fore the...

nice plan but space is really interesting and i didnt spend that much time for it. I could remember most of it from trials.

i did this question from dt point. since g at a point is give by {g=GM/r^2) and an object is btn mars and jupiters its g is close to zero but g forces are a ratio of apparent weight/ real weight thus g+a/9.8= 26.95+0/9.8

This whereby neutrons are used to study the structure of an atom because they have no charge and have a relatively similar mass to the protons. They are also more effective as they have a debroglies wavelength that is comparable to atomic spaces in crystal structure and they can travel slowly...

True we did the hydrogen spectrum prac after i posted my comment. Its just the visible colours of the hydrogen spectrum. lol Thanks

Its a describe dotpoint so its mainly providing characteristics of Bohrs postulates and relate them to the develpment of the mathematical model. e.g. Bohrs postulates: (1) Electrons can only orbit in specific stationery states. This contributed to the balmer eqn which could explain the...

Re: 回复: Who's failing the external Maths Ext 2 exam? My technique has been do qsn 1-6 as quickly as possible. roughly 2 hrs then i have alot of time to think for the last 2. Qsn 7 and 8 are the hardest in most hsc papers and so if u get them right who knows where ua mark might shoot up to.

Yep u r rite. Its to make k either divisible by 3 or not divisinbe by three. siince we already noe that w^3=1 and 1+w+w^2=0 finding solutions of 1+w^k+w^2k is made possible by making the either divisble or not divisble by 3.

If u analyse the context in which he says it is when Marty says, "we beleive he is a war veteran" you are very right to saying that it makes the news more melodramatic but also captures the viewer attention. This leads to the audiences speculating and connecting emotionally to the kids in the...

am also using an image for my 2nd related material. I think if u avoid sounding repetitive and shallow in ua analysis then it shouldnt be a problem. i have a back up just in case the image is a bad idea.

id say the aston martin, though even if you had the money yyou would have to wait for the two years waiting list, if you are impatient go for the bmw it a cute car

honestly you can learn to do it well in about 5-6hrs but then your feet are as tired as hell and they hurt bad

i hate people who drive slowly on motorways. the main reason there is motorways is so that people can drive faster.esp people who go 70ks in a 90ks zone hate them

Thanks very much now i can make a stronger and more valid connection btn both composers and their witty ability to make social comments without telling people what to do.

Feminist Reading is quite relevant. The reference/implications of a patriachal society and the mother being a comforter{relating this to the Glass Jar}. This reading is mainly contextual as different times shape different intepretations of the same thing and the feminist reading is an important...

The Emma movie is mainly gud for the climaxes{MS BATES SCENE and Elton's Carriage scene} and i was advised not to watch it b4 reading the novel for detail purposes.

did 3.5 hrs of Physics and 3 hrs extension past hsc paper

that would take ages to write and talk about. soo dont think they would bring the standard model.

lol yh. Library is a good idea especially for doing math{when with mates}. Other subjects u may have a lower concentration span than normal.