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  1. A

    Physics P11 Help-URGENT

    Q.9) U have to apply the the relative velocity rule. Ua - Ub = Vb - Va !!! Ua - Ub = u-(-u) = 2u .. Only the velocities in option A giv the relative velocity as 2u Q.10)Find the deceleration which is equal to 60/30 = -2 ! nw put in the formula v-u/t = -2 v=(-2 x 0.5) + 3 = 2 Option C
  2. A

    p1 help needed!plz help me

    specify variant :O
  3. A

    Guesses for Business Studies

    I dont think anyone opting for commerce subjects browse these forums -.-
  4. A

    p1 help needed!plz help me

    It indeed seems to be an interesting paper.. Keeping it for tuesday :D last mint preparations ;)
  5. A

    Physics approximation questions

    Its slved.. We r bound to do it wrong unless we go outside and weigh ourselves at the grocery shop ;)
  6. A

    Accounting !

    Thanx Hamiz jaan :D
  7. A

    Phiscis Paper 1 Questions :D

    Q.23 june 04) F=Stress x A . Find the area.. radius = 0.0005m find the area by pi r^2 . Multiply this area by strss given and u get force of abt 785 N.. which lies in the range of Option C Q.25) As the wave is moving towards left the point will move in the direction of the wave.. the next...
  8. A

    physics mcqs HELP !

    I m from Pakistan.. 4 papers AS :D U ?? Pray for me Phy p1 :D And best of luck to all of you too :)
  9. A

    Phiscis Paper 1 Questions :D

    Q.11 june 04 ) this one is very simple.. U juss need to find mmentum of both and subtract cuz they are in opposite direction !!! for 21 u r given mass the 1/V . . Density = M x 1/V Density of P = MpNp which is greater than density of Q = MqNq
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    Phiscis Paper 1 Questions :D

    June 04. Q6) Calculate individual percntage uncertainties. FOr currnt it is (0.05/2.50) x 100 .it gives u 2percent. for resistance u r given 2prcent.. The formula is I^2 x R . so u need to multiply th uncertainty of current by 2. The answer u get is 2(2) plus 2 which is 6percent
  11. A

    Phiscis Paper 1 Questions :D

    Nov 03 .. Q.31 ) Find the total current.. I=V/R .. I=12/4 = 3A ... 4 is the combined resistance of the circuit Now see how much is being used by the 2ohm resistor .its 6V . the remainig 6 V is being supplied to the parallel system. Find the currnt by V/R 6/6 = 1A . so its option A
  12. A

    Phiscis Paper 1 Questions :D

    Nov 03..Q.28 !! Using the formula dsina=n x wavelength, find the second order maxima.. dont forget to do the conversions. u should get the angle for 2nd order 48.6 .. now subtract 22 from it u get the angle between the two..26.6.. option B
  13. A

    p1 help needed!plz help me

    Q.31 ) This one is easy.. the time is given just to confuse you .. You can use time if u use the equation E=VIT, but it is far easier if u use E=VQ .. divide E by V and u have your answer :)
  14. A

    p1 help needed!plz help me

    In question 15, what u need to notice is that along with the height the mass is also reduced by 0.5 when the two water levels are equal. so P.E = 0.5m x g x 0.5h which gives u mgh/4 !!!
  15. A

    p1 help needed!plz help me

    weight would be lifted if there is a minimum torque slightly grater than zero.. we assume them to be equal because even the slightest change would result in lifting of the weight .. Well Q.10 is C as the body was stationary the momentum is 0. find out the velocities.. M has velocity V while 2m...
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    Physics P1 please help :(

    If there is a system of springs with different spring constants then does the force divide equally even then ?? and how do we calculate extension ??eg. 2 springs are in parallel with spring constants 10 and 5 respectively attached to a 40 N weight.. How do we calculate the total vertical...
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    p1 help needed!plz help me

    Well for this one the total opposite torques must be equal.. So: 900 x 0.20 = F x 1.20 U get F = 150 !!
  18. A

    physics mcqs HELP !

    Q.10) total a is constant for both masses which is given by F=4ma where F is the total force and ma=F/4.. now for block Y the mass is 3m and F for it is given by 3ma but ma=F/4 there for F on block y =3F/4
  19. A

    physics mcqs HELP !

    Q.32) U will take the voltage 7.5V and not 9V because the drop shows the voltage drop by internal resistance.. SO the I becomes 7.5/15 = 0.5A Q.40)U need to add and minus the charges of quarks in such a way that u get +1 which is the charge of proton. this is only given by option D as 2...
  20. A

    Accounting !

    Physics ! well i did not want to make a new thread for a single question.. I have a phy question too.. please help ! If there is a system of springs with different spring constants then does the force divide equally even then ?? and how do we calculate extension ??eg. 2 springs are in...
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