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  1. angelicsuccubus

    Physics: Post your doubts here!

    yeh.. do you want me to draw it?
  2. angelicsuccubus

    Physics: Post your doubts here!

    q1 doesn't have a part c and for 5b(i) .. you just make it lag behind 1/3 of half the wavelength. .. cause 60degrees is pi/3 so its should look like.. sorry, shakey hand on the touchpad
  3. angelicsuccubus

    Physics: Post your doubts here!

    the new period is 0.25t where t is the old period.. so that means the new wave would occur four times within the old wave.. yeah? cause frequency=1/time period.. so you just draw a wave with the same amplitude but 4 cycles within one wave cycle on fig 6.2... and that would mean that your wave...
  4. angelicsuccubus

    Physics: Post your doubts here!

    distance moved= area under the graph area under the graph approximates = 1550 squares every 100 squares= 0.2 cm so 1550/100= 15.5 15.5 x 0.2= 3.1cm =0.031m
  5. angelicsuccubus

    Physics: Post your doubts here!

    anytime ..
  6. angelicsuccubus

    yeah sure, what do you need help with?

    yeah sure, what do you need help with?
  7. angelicsuccubus

    Physics: Post your doubts here!

    you mean terminal velocity? well yeah at that point acceleration of gravity will become zero.. that's why its called free falling.. cause there isn't actually a force left that's making the person fall. But even with terminal velocity to work with.. its the same thing... if resistance was the...
  8. angelicsuccubus

    Physics: Post your doubts here!

    hmm.. well you can't add them cause if the resistive force was equal to the downward forces, the dude would be hanging in midair... I don't have a very good explaination for this but think of it like this.. since the guy is falling downwards and there is no force pushing him downwards, so no...
  9. angelicsuccubus

    Physics: Post your doubts here!

    it's just 1/2kx^2=1/2mv^2 and the speed used is twice than the speed found in c(i) so.. 16m/s and k is from the beginning 1250N/m and m is 25g and x you're going to get as 72mm
  10. angelicsuccubus

    Physics: Post your doubts here!

    anytime.. so long as I don't fall asleep on the laptop .....
  11. angelicsuccubus

    Physics: Post your doubts here!

    cause lamp A isn't in parallel.. if it's shorted, there would be no resistance in its spot and loads of current will flow to lamp c and lamp b blowing them too. Part b is not based on a, its just a general suggestion based question on the circuit given.... that if you wanted to test the circuit...
  12. angelicsuccubus

    Physics: Post your doubts here!

    Jaf there's loads of other unanswered questions here though.. and Im getting really sleepy.. i think you should take over
  13. angelicsuccubus

    Physics: Post your doubts here!

    that's what I was tryna do! .. except here: ΔR/0.489 = 23/1200 I wasn't multiplying the 0.489... donno why I didnt realise that's what happens lol
  14. angelicsuccubus

    Physics: Post your doubts here!

    no, total k.e after collision is the kinetic energy of ball B after collision plus the kinetic energy of ball S after collision, that's why they said to use your answer in(c). its 1/2(1.2)(0.8)^2 + 1/2(3.6)(1.6)^2 sorry, for the earlier long explaination.. its cause you said you'd never...
  15. angelicsuccubus

    Physics: Post your doubts here!

    It's really simple... here, watch this: http://www.khanacademy.org/science/physics/v/projectile-at-an-angle And here's the notes I once made, the cover everything on projectile motion in the syllabus but if you can't read my hand writing, check the revision notes on xtremepapers under phsyics...
  16. angelicsuccubus

    Physics: Post your doubts here!

    Have you studied physics before or is today like the first introduction to momentum? Speed of approach is the speed which with the particles come towards each other and speed of seperation is the speeds they have once they have collided and are moving away from each other. Kinetic energy is...
  17. angelicsuccubus

    Physics: Post your doubts here!

    uh Im still tryna figure that one out..
  18. angelicsuccubus

    Physics: Post your doubts here!

    well of course they collide at the same time! they collide with each other, how can they collide at different times -_-"
  19. angelicsuccubus

    Physics: Post your doubts here!

    got it, its s=1/2(u+v)t... u is 0 cause it falls from rest .. the rest is just reading d.. I took it as 0.55, so 0.55=1/2(u+v)(0.4) gives you 2.75m/s
  20. angelicsuccubus

    Physics: Post your doubts here!

    I didnt check the ms, but is it 1.375m/s?
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