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basically ur y function still remains the same as above while ur x function changes. ur x function actually becomes (usin30-5sin15)t due to the fact that the ball is thrown at an opposite direction to the motion of ur balloon. then do the same procedure and u should end up with ur answer

damn just realised i forgot about the horizontal velocity of the balloon and principle of relativity...

whats so hard about this question? it's a very basic 3u projectile motion question since "The ball lands 70m away from the moment the ball was thrown" and "The height of the balloon at the moment the boy throws the ball is 150m". basically ur first line is just pure rubbish and using y =...

u forgot to add the directions since he is asking u velocity rather than speed. in an exam u would fail epically though u might have gotten the correct answers (i learnt it the hard way...). and why do u take things so serious? though the truth is that a plane wouldn't get to the height of...

u can answer all of them, assuming the plane is flying horizontally (which is most of the case). if that's true then the answer to b) is 100m/s

i just realised u can't do the small 1s and 2s on this website... meh atleast they allow pictures. anyways it's below:

the formula is actually law of conservation of momentum. i'm assuming that u can't type the formula so i'll just give u the formula: m1u1 + m2u2 = m1v1 + m2v2

lol nope and i doubt u want to play handball there... unless u want to make ur self look like a total retard

lol u might want to read the article from this website below: Tests question Windows 7 battery efficiency - Techworld.com i think the key to better battery life is simplicity. less tasks means less stuff needed to be processed= better battery life.

actually, the fan is too silent lol. there is only 1 fan placed inside the laptop and it barely does anything. basically dell decided to make a beast but just before they finished their creation, they decided to add some soft and calm textile to it. most people tend to stress on the heating...

i'm not overclocking lol. that's the least i want to do. i'm only undervolting, which reduces the amount of heat produced and increases battery life. anyways i'll let u and the others know how well the batteries go when i test it. i've ordered mine 3 days ago so roughly around 6-9 days left...

the only major problem i heard with that laptop is the battery life. but i heard dell has already improved it abit. think it should last me 2-3hrs. plus i can just undervolt the laptop and improve the battery life by 15-30mins (with no decrease in performance of course. but definitely i'm not...

well this is true for most scenarios i must agree, but there are exceptions. u might want to check out dell's studio xps 16 (the $1998.99 one). it's basically a beast designed to dominate in gaming without having to sell ur body parts. i'll list the specs here: CPU: intel core i7-720QM (1.6GHz...

well the truth is that power doesn't remain constant or there will no need in finding an alternate solution in reducing power loss during transmission (this is in the syllabus). only in some theoretical situations, the power is said to remains constant. but, the reality is, there is no possible...

well, i would have went with C) because of law of conservation of energy and when u actually consider all the energies, there are only overall voltage (supply+back emf), heat due to the resistance of the material used, and finally the kinetic energy which is ur motor effect. If that wasn't...

well, the truth is that in an actual science report, there is no risk assessment...seriously. the actual structure of a scientific report is something like this: title abstract introduction materials and methods results discussion conclusion acknowledgment references i've got multiple...

99.99% of luck+0.01% of basic knowledge=band 6 without any studying just jking, anyways for math i focus on the concepts rather than doing a load of questions. just spend 1-2hrs thinking about the concepts and get my confidence up then all the sample questions and 2-3 extension questions. the...

meh win xp is stable enough for me. never had a blue screen before and everything's being fine for me. as for the durable design, i personally don't need it since i keep my expensive items in prestige conditions and since i'll keep it home most of the time unless i'm on a trip or something

the only thing i hate about macbooks is their specs to price ratio. it's basically so crap that its not funny. their best laptop is the 17 inch macbook pro which costs 2.5k and here are the specs: Processor: 2.8GHz Intel Core 2 Duo processor Memory: 4GB memory Hard disk: 500GB...

to me, acer is alright in terms of its specs for spending. the only con that i know is that most of their laptops don't look satisfying and that u get a cheap feel to it. but i've never used an acer so i don't know how they good they operate.