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This is a common perception and is proof that you have grasped the principles of special relativity You are referring to the 'twin paradox' scenario (which I recommend googling and reading the wiki) Come back and let me know what you thought

Re: HSC 2015 2U Marathon this is troll to the next level

simply put, you are confused about special relativity lets first clear up that 'slow time' misconception: when a person is in a ship moving at 0.9c and measures 1s in their frame, an observer outside (stationary) would measure this as 1/sqrt(1-0.9^2); the 1 on top is t(0), known as 'proper'...

i thought there was interference, just no change in pattern observed

i would be assuming: -talk about intentions of MM exp (i.e. earths velocity through aether etc.) -explain that even with repetition (diff loc, time), still null -challenged sci thinking and einstein resolved this through theory of special rel. explaining that c is constant to all observers...

back in the 30s

That typo thought hawk, ahaha

I've seen this question multiple times, and majority of trials have written no net force. Now whether this is true for HSC exams, i'm not sure However, from my understanding, the gravitational force is always acting on the satellite (hence keeping it in a stable orbit), hence the notion of...

i tried this, lasted 2 days then died LOL

Re: HSC 2015 3U Marathon bruh, my teacher's like: "i'll make sure you don't get 100%, so I'll find an extra hard perm q this year" LOL.

Re: HSC 2015 3U Marathon i feel you, lost 4 marks in last exam, gg

Re: HSC 2015 3U Marathon for i) 1st number doesnt matter, so 1/1 chance lol, 2nd number has to be different, so 5/6 chance until 5th number which is 2/6 iii) (i think) 1st throw can be any number, 2nd throw is 5/6, 3rd is 4/6 then another 1/6 followed by 1/6 (which is the 3 recurring numbers)...

Re: HSC 2015 3U Marathon i think for this case, it was faster to use the rigorous method :O

re: HSC Physics Marathon Archive I remember there was something "relative to the planet" as well :O

re: HSC Physics Marathon Archive - gravitational field of a planet 'pulls' a spacecraft in -> accelerating as it comes in and decelerating as it leaves relative to the planet - as the planet rotates about the sun, its angular momentum is transferred to the spacecraft giving it a velocity boost...

Re: HSC 2015 3U Marathon shouldn't this be 5/8? wow such a simple method, i was doing combs and stuff: i) 7C3/9C5 etc...

Re: HSC 2015 3U Marathon yeah im not sure about the answer, would also like an explanation

Re: HSC 2015 3U Marathon 5 people are to be selected for a committee out of 9 people, two of which is Michael Jackson and Homer Simpson a) what's the chance of both MJ and HS being selected b) one of them being selected c) they both die and not being selected? (for the luls)

Re: HSC 2015 3U Marathon i) take cos of both sides. sin-1x has a range of -pi/2<=y<=pi/2 and we know that cos(-pi/2<=y<=pi/2) is always >=0 ii) x=siny on re-arranging. From double angles, cosy=sqrt (1-sin^2y)=sqrt (1-x^2) iii) dx/dy = cosy = sqrt (1-x^2) -> dy/dx = 1/ sqrt (1-x^2)

Re: HSC 2015 3U Marathon Ahh geez, i read it as if "2 is the smallest number both players" have. Forgot the 'common' =.=