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    hi,

    anyone got a MS for that phy 4 - june 2000 paper? teacher gave me the paper and the MAS is not on that school website most people now know - know where i can get a hold of a copy?

    pk

    cheers in advance
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    1. What is meant by “an equation is homogeneous with respect to its units”:
    Each side/term has the same units 1
    Equation x = ut + ½ at2:
    ut - (m s–1) s = m
    at2/2 (m s–2) s2 = m
    all 3 terms reduce to m 3
    [Allow dimensions]
    Explanation:
    Wrong numerical constant/wrong variables
    Units same, numbers wrong/
    Units same, magnitudes wrong 1
    Example = 1 kg + 2 kg = 5 kg
    [5]

    2. A body oscillates with simple harmonic motion when the resultant
    force F acting on it and its displacement x are related by the expression
    F =  kx or F   x.
    The acceleration of such a body is always directed towards the centre
    of the oscillation or in the opposite direction to displacement/x =
    0 /equilibrium/similar
    The acceleration of the body is a maximum when its displacement is
    maximum and its velocity is maximum when its displacement is zero. 4
    Force constant:
    = 14
    N m–1 or kg s–2 2
    [6]

    3. Circumstances under which two progressive waves produce
    a stationary wave:
    Both transverse/longitudinal/same type
    Waves have same frequency/wavelength
    and travel/act in opposite directions/reflected back. Max 2 marks
    Experiment using microwaves to produce stationary waves:



    Adjust distance of transmitter/plate
    How it could be shown that a stationary wave had been produced:
    Note readings on probe/detector/receiver form a series of maximum
    or minimum readings or zero 3
    [5]

    4.

    One of compression C and one rarefaction R marked as above.
    Wavelength of wave = 11 - 11.6 cm (u.e.)
    One of maximum displacement M marked as above [M, 5th, 6th, 7th ].
    Amplitude of wave = 8 ( 1 mm) [consequent mark]
    [4]

    5. Explanation:
    Photons/quanta
    Photon releases / used electron
    Energy/frequency of red < energy/frequency of ultra violet
    Red insufficient energy to release electrons so foil stays 4
    Ultraviolet of greater intensity: foil/leaf collapses quicker/faster
    Red light of greater intensity: no change/nothing 2
    Observations if zinc plate and electroscope were positively charged:
    Foil rises or Foil stays same/nothing
    as electrons released it becomes more Released electrons attracted back by
    positive positive plate/more difficult to
    release electrons 2
    [8]

    6. Energy level diagram:

     13.6  0
     1.51  0 AND  3.39  0 ONLY 2
    Why level labelled  13.6 eV is called ground state:
    Correct reference to stability/lowest energy state/level of
    the electron/ atom/hydrogen 1
    Transition which would result in emission of light of wavelength 660 nm:
    Correct use of c =f or E = hc/ or f =
    Correct use of eV/J i.e. ÷ 1.6 × 10–19
    E = 1.88
    Transition = 1.5  3.39
    [May be a downward arrow on diagram] 4
    [7]

    7. Maximum acceleration of mass:
    a = () 2x with x = 6.0 mm used or a = ()(2f)2 x
     = or f =
    = 23 mm s–2 [u.e.] 3
    Graph:



    Straight line
    Negative gradient
    4 quadrants: line through 0,0
    Line stops at 6, 0.023 [e.c.f. x, a] 4
    Reason why mass may not oscillated with simple harmonic motion:
    F not proportional to x or a not proportional to x
    Spring past elastic limit: K not constant: spring may swing as well as bounce.
    Other possibilities, but not air resistance, energy losses 2
    [9]




    I think this is the one. Hope its ok, spome of its gone a bit wrong cos its shortcuts 4 stuff but u'll get the jist of it
    x
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    (Original post by Phil23)
    hi,

    anyone got a MS for that phy 4 - june 2000 paper? teacher gave me the paper and the MAS is not on that school website most people now know - know where i can get a hold of a copy?

    pk

    cheers in advance
    actually its the phy 5 one i'm after i think - the dumb teacher gave me the paper for phy 5 and cover sheet for phy 4 by the looks of it - bozo:rolleyes:
 
 
 
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