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Consider a rocket with a mass of 50000kg moving at 100m/s. The rocket motor ejects a 1000kg "burst" of gas every 10 seconds with a velocity of 1000m/s. What is the velocity of the rocket relative to the Earth after 10s? answer is like 120.41m/s any ideas?

I think the formula has been removed from the syllabus because I havent seen it yet but checking my textbook: linear speed = (2 pi r ) x number of revolutions / T centripetal acceleration = v2/r 2a) linear speed = (2pi x 0.15) x 4 / 1 = 3.77ms-1 2b) centripetal acceleration =...

My teacher tells me to regurgitate this: As it is true for n=1, it will hold true for n=2,3,4... and all positive integers of n!

omg now i know what i did wrong! When I substituted k+1 I didnt put it in brackets! Thanks heaps mate :D

52n - 1 is a multiple of 24 Use induction to prove divisibility for all positive integers n

I was just checking if it was coming out the right way with the whole sup and sub thingy

log102x + 1 = log10102x (x + 1)log102 = 2x log1010 (x+1)/2x = Log1010/Log102 theres some rearranging here: x = 1/ (2xLog1010/Log102 -1) x = 0.1771838201 and daym u namu!

at first glance part c) looks like 0 because at the maximum height the projectille should be stationary

got distinction as well =]

thanks heaps, omg most stupid mistake in part (a), when dividing by 2a i forgot to do that to the x0 so i never get x0/2a!

(a) Write down the equation of the chord of contact of the parabola x^2= 4ay from the point P (x0,y0) then write it in gradient-intercept form. (b) Let this chord meet the axis of the parabola at T, and let the line through P parallel to the axis meet the parabola at N. Use part (a) to show...

Show by substitution that the chord of contact from the point (-5,2) to the parabola y^2 = 20x is a focal chord. Why is it so?

ah we started work regardless if were dropping a sub or keeping it.

all our subs stayed the same for the moment, yr 12 ext subs start next week..my mates tho, that funny bunch pinched from each side and stole my banana bread and it was the last bit! lucky they gave it back!

Since 1788, the Aboriginal race has widely been recognised as the primitive civilisation in contrast to the superiority of the Europeans. Their existence was considered nothing more than flora and fauna even though they were the original occupants of this land. This concept was officially...

Re: Recommended Texbooks/Study Guides for Preliminary HSC? JUst wondering the order of texbooks in terms of which would best supplement Physics in Context 2 and Jacaranda 2. The books im considering atm are Spotlight and Macmillan. Would anyone care to say which one is better?

my plan is to get as much of the theory of all my subs done and make notes so then I can hopefully do past papers in the following holidays.

is this for something at school?

ahh right, cos when i hear work experience I get the idea your doing a job and not receiving the pay for it!

Re: Year 12 in a week! why am I not scared? I mean maybe your the kind of person that it takes a while to kick in. Whilst i'm being quite laid back doing little work here and there, I'm slowly drilling into my mind that its not good to be so laid back and slowly ease up a bit. Seems to be...