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  1. queen of the legend

    Physics: Post your doubts here!

    you get 0.4 ms not 0.36 ?!
  2. queen of the legend

    Physics: Post your doubts here!

    for s-2012/12 question 17 : take pe for each block :first does not move 2nd : m 2h g 3rd: m 3h g 4th : m 4h g add them you get 3m 9h 3g take LCM ... 3 (m 2h g ) ..= 6 mgh ... ......it doesnt make sense for me still but this is how i did it
  3. queen of the legend

    Physics: Post your doubts here!

    for 18 : E= power output / input ... out put is already given ...for input you multiply fuel comsumption by energy content ..convert to SI units. to check wether you did it correct multiply with units and you'll get ______j /s that is the unit of power . (sorry i think this is not what you asked...
  4. queen of the legend

    Physics: Post your doubts here!

    in this question originally the pressure = rho g h ....when hieght incresed by h again p= rho g 2h
  5. queen of the legend

    Physics: Post your doubts here!

    in 24 the answer is E since young modulus is property of material and the material stays the same so E is constant ...its a tricky question ! for 26: since I is proportional to a^2/x^2 ..... so increasing x by 2 gives us 4x^2 ....since x increases by 4 I decreses by 4 and hence amplitude...
  6. queen of the legend

    Physics: Post your doubts here!

    you can solve this question in two ways : (2nd is recommended) at first we know that X= lamda x d / a , so apply it for the first equation and take d=1 1 x10^-3 = 600 x 10 ^-9 x 1/ a a= 0.6 mm in the second equation we knw that x = 3mm and d increses by 2 ..so...
  7. queen of the legend

    Physics: Post your doubts here!

    for 2010 question 33 : can we take any number for the resistance ?
  8. queen of the legend

    Physics: Post your doubts here!

    thank you a lot
  9. queen of the legend

    Physics: Post your doubts here!

    people please help me out with the following questions: 2009: q 13, 15 , 18 , 20 2010 : q 11, 27 , 33 2011: q 13, 14, 15, 19, 25, 27, question 34 : if R=(rho)L/A how do we relate L/A to volume V ? ......and for question 9 : one mass in motion collides to stationary mass and they...
  10. queen of the legend

    Physics: Post your doubts here!

    since electric field is acting downwards (directed from positive to negative) the negative charge on the rod will be directed towards the positive of field and vice versa ................this causes a resulatant torque (non-zero) on the rod but resultant force is zero so ans is C
  11. queen of the legend

    Physics: Post your doubts here!

    paper 1 doubts please help (All may/june) 03: 11, 13, 15, 17 , 22, 40 04: 6, 11, 14, 16, 33 ...(why 16 is not d?) 05 : 4, 7, 11, 13, 15, 24, 32, 33, 37. 07: 27, 33 , 40 08: 16, 24, 23, 26, 32, 34
  12. queen of the legend

    Physics: Post your doubts here!

    No more discussions going on !!!! seems that everyone attended the oct exam !.................well then good luck with the results ;)
  13. queen of the legend

    Physics: Post your doubts here!

    people how was the exam today ?!?
  14. queen of the legend

    Physics: Post your doubts here!

    i appreciate Ur effort. thank you
  15. queen of the legend

    Physics: Post your doubts here!

    thank you ! it did help
  16. queen of the legend

    Physics: Post your doubts here!

    yesss question 5 cii thank you :)
  17. queen of the legend

    Physics: Post your doubts here!

    Ooh i think i have lost the paper!! i dnt knw which one is it .....wait i will look for it
  18. queen of the legend

    Physics: Post your doubts here!

    question 4 in 2010 may/June variant 22 please explain how to calculate the resultant intensity asap
  19. queen of the legend

    Physics: Post your doubts here!

    when calculating speed of sound in such an expt, you already know the frequency because it is adjusted or you can calculate it from the graph by counting for the period of the wave , and then using F=1/T wavelength is calculated when the microphone picks a maxima (antinode) and is moved along...
  20. queen of the legend

    Physics: Post your doubts here!

    m stuck in calculating the resultant intensity in question 5 c ii oct/2005
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