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  1. 6

    AS Physics P1 MCQs Preparation Thread.

    hm okay so basically there are 2 factors that affect the R, which drops the V. the factors are : length of wire current has travelled through and the resistivity of the wire since the rate of current passing through the wire is always the same under same resistivty so we know gradient will be a...
  2. 6

    AS Physics P1 MCQs Preparation Thread.

    you can find the seperate continuation: W10 qp 12 #8 probably one of the toughest kinematic Q ever in AS level s = ut + (at^2)/2 so 40 = 12u + 72a or 40 = 6v + 18a then use s = t(u + v)/2 so 40 = 6(u+v) u + v = 40/6 v = 40/6 - u substitute into 40 = 6v + 18a so 40 = 40 - 6u + 18a so you get...
  3. 6

    AS Physics P1 MCQs Preparation Thread.

    In AS level? you dont have to know about quarks just need to learn alpha, beta gamma and isotopes
  4. 6

    AS Physics P1 MCQs Preparation Thread.

    S11 qp11 #14 this one is tricky, utilize the kinematics equation V^2 = U^2 + 2as so the first drop is u^2 = 0 + 2ah the rebound is 0 = v^2 - 2a(h/2) = v^2 - ah so v^2/u^2 = 1/2 v/u = 1/squareroot 2 #34 R= pl/A and unit of l/A = m^-1 = V^(-1/3) so R = p/(V^1/3) #35 ratio of resistance is...
  5. 6

    AS Physics P1 MCQs Preparation Thread.

    no, there is air resistance. freely just means there is no external force besides air resistance. notice how towards the end (intercept with t axis) gradient is nearly a straight line no longer changing because it has reached terminal velocity.
  6. 6

    AS Physics P1 MCQs Preparation Thread.

    λ=ax/D where λ is wavelength, a is slit separation, x is fringe seperation, D is distance between slit and wall just rearrange equation to see whether they're proportional or inversely proportional x= λD/a so bigger wavelength longer distance smaller slit seperation will mean bigger fringe...
  7. 6

    AS Physics P1 MCQs Preparation Thread.

    Polymeric material is like rubber so here is a really clear diagram I doubt they'd ask crystalline amorphous solid graphs, those are just choices to confuse the candidates. considering different amorphous / crystaline substances behave differently. some are brittle some are elastic there is...
  8. 6

    AS Physics P1 MCQs Preparation Thread.

    what's equilibrium? no net force about any direction no net torque about any point there is no force to balance H in B
  9. 6

    AS Physics P1 MCQs Preparation Thread.

    I is proportional to A^2 so I=k(A1)^2 2I = k(A2)^2 so (A2)^2 = 2((A1)^2) A2 = A1 x squareroot 2
  10. 6

    P1 MCQ's preparation thread for chemistry ONLY!!!!

    ok this is a disproportion reaction oxidation number of I in HIO is +1, in I2 is 0 and in HIO3 is +5 so HIO to I2 is (+1 -> 0)x2 which is -2 because there is 2 Is in I2. and HIO to HIO3 is (+1->+5) which is +4 ratio is -2:4 is 1:2 so mol ratio must be 2:1
  11. 6

    AS Physics P1 MCQs Preparation Thread.

    number of wavelengths of visible light in one metre? if so, wavelength of visible light is 400nm->700nm 1/400nm and 1/700nm so roughly 1.4 to 2.5 x 10^6 so around 10 to the order of 6
  12. 6

    AS Physics P1 MCQs Preparation Thread.

    I mean the answer is D sorry typo
  13. 6

    AS Physics P1 MCQs Preparation Thread.

    kinematics equation s = ut + (at^2)/2 since initial speed is 0 so s = (at^2)/2 substitute the values in x = (a(t1)^2)/2 x + h = (a(t2)^2)/2 solve the simultaneous equations so h = (a(t2)^2)/2 - (a(t1)^2)/2 = ((t2)^2 - (t1)^2) x a / 2 a = 2h/((t2)^2 - (t1)^2) so answer is D
  14. 6

    AS Physics P1 MCQs Preparation Thread.

    "trolley is held at rest" so there is no net force so force from P must equal force from Q F=kx so force in P = 60x0.4=24 Force in Q must equal 24 too x= F/k = 24/120 = 0.2 answer is B
  15. 6

    AS Physics P1 MCQs Preparation Thread.

    "trolley is held at rest" so there is no net force so force from P must equal force from Q F=kx so force in P = 60x0.4=24 Force in Q
  16. 6

    P1 MCQ's preparation thread for chemistry ONLY!!!!

    relative speed of approach = relative speed of seperation, lots of students get confused by this question because there is no solid formula note its speed not velocity. speed of approach for this question you add U1 and U2 because they're coming towards each other. seperation because they're...
  17. 6

    AS Physics P1 MCQs Preparation Thread.

    constructive interference
  18. 6

    AS Physics P1 MCQs Preparation Thread.

    #34 wire is in a loop ie. supply -> wire -> relay -> wire -> supply -> wire...... etc. so its in series #18 Energy is always conserved so Initial energy = final energy so Ek = new Ek + change in Ep (mu^2)/2 = (mv^2)/2 + mgh cancel out all the m ( masses) (u^2)/2 = (v^2)/2 + gh 28^2 /2 = v^2 /...
  19. 6

    AS Physics P1 MCQs Preparation Thread.

    Energy is always conserved so Initial energy = final energy so Ek = new Ek + change in Ep (mu^2)/2 = (mv^2)/2 + mgh cancel out all the m ( masses) (u^2)/2 = (v^2)/2 + gh 28^2 /2 = v^2 / 2+ 9.81x22 392 = v^2 /2 + 215.82 v^2 /2 = 176.18 v^2 = 352.36 v = 18.8 answer is B
  20. 6

    P1 MCQ's preparation thread for chemistry ONLY!!!!

    Here is a quick equation (V1P1 + V2P2)/(V1+V2) = new P so (5x12 + 10x6)/(5+10) = 120/15 = 8
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