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    (Original post by pineneedles)
    Power * 5 * 60 = (raspberry mass + pan mass) * (c for raspberry + c for pan) * delta T

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    That's incorrect.
    It should be E = (Raspberry mass * Crasp) + (Pan mass * C pan) all multiplied by delta theta.
    Re-arrange to find dtheta.
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    (Original post by Joshthemathmo)
    I got 11.6 for the temp, I added the m and c respectively. Would I lose 1?




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    Yeh probably 1 lost.


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    (Original post by oShahpo)
    That's incorrect.
    It should be E = (Raspberry mass * Crasp) + (Pan mass * C pan) all multiplied by delta theta.
    Re-arrange to find dtheta.
    Yep. That is the way to do it I think.


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    (Original post by oShahpo)
    That's incorrect.
    It should be E = (Raspberry mass * Crasp) + (Pan mass * C pan) all multiplied by delta theta.
    Re-arrange to find dtheta.
    Yeah, that seems reasonable. Tbh I didn't know what to do anyway, just thought it'd be best to try something.

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    (Original post by physicsmaths)
    Yep. That is the way to do it I think.


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    Yea
    E1 = M1C1 dTheta
    E2 = M2C2 dtheta
    E1+E2 = power*time
    rearrange to find theta. Too bad I didn't actually do that, it only came to me after the exam.
    I took the average C instead.
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    (Original post by pineneedles)
    Yeah, that seems reasonable. Tbh I didn't know what to do anyway, just thought it'd be best to try something.

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    The answer came to me only after the exam. I took the average C instead.
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    For the time question, what you're supposed to do is to use a sine function, makes it a hell of a lot easier.
    Period = given time * 2
    W = 2pi/period
    then use 0.6 = 2.3 sin wt
    find t
    multiply t by 2
    then subtract the answer from the given time.

    Btw, I forgot to multiply the period by 2, how many marks would I lose?
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    (Original post by oShahpo)
    The answer came to me only after the exam. I took the average C instead.
    How did you find this paper? I realise you seem very good in physics. I'm hoping for an A, any idea on grade boundaries? 55 for an A and 60 for A*?
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    (Original post by oShahpo)
    For the time question, what you're supposed to do is to use a sine function, makes it a hell of a lot easier.
    Period = given time * 2
    W = 2pi/period
    then use 0.6 = 2.3 sin wt
    find t
    multiply t by 2
    then subtract the answer from the given time.

    Btw, I forgot to multiply the period by 2, how many marks would I lose?
    There was a given time??
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    (Original post by oShahpo)
    For the time question, what you're supposed to do is to use a sine function, makes it a hell of a lot easier.
    Period = given time * 2
    W = 2pi/period
    then use 0.6 = 2.3 sin wt
    find t
    multiply t by 2
    then subtract the answer from the given time.

    Btw, I forgot to multiply the period by 2, how many marks would I lose?
    I did the same but used cos instead of sin.
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    (Original post by Qcomber)
    How did you find this paper? I realise you seem very good in physics. I'm hoping for an A, any idea on grade boundaries? 55 for an A and 60 for A*?
    Well, the short answer is that I don't know. A lot of the qualitative questions were obvious ones that came up before, however, there was about 15 marks worth of tricky questions. Possibly 62-66 for an A* I reckon.
    I personally lost around 10-15 marks.
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    (Original post by oShahpo)
    The answer came to me only after the exam. I took the average C instead.
    what did u get for 5 mark shm
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    (Original post by Middriver)
    There was a given time??
    Yea the time for the shutter to go up and down. It was 4.3 or something of the sort.
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    I'm quite sure for the 5 mark SHM question the answer is 3.04 seconds.
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    (Original post by ajaxkiller)
    what did u get for 5 mark shm
    I got the wrong answer as I forgot to time the period by 2 in the method I described above.
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    (Original post by Connorbwfc)
    I'm quite sure for the 5 mark SHM question the answer is 3.04 seconds.
    What was the time given?
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    (Original post by oShahpo)
    I got the wrong answer as I forgot to time the period by 2 in the method I described above.
    what was the amplitude of d thing
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    (Original post by ajaxkiller)
    what was the amplitude of d thing
    Depends. If you use a sine function then the amplitude is 2.3 and the period is twice the period given. If you use a cos function then the amplitude is 2.3/2
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    (Original post by Connorbwfc)
    I'm quite sure for the 5 mark SHM question the answer is 3.04 seconds.
    This is what I got. I did 0.7 + 0.7 + half the time period
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    Guys what was the very last question? Was there a question about the conditions of fusion? I seem to have missed that. Was that right after the joules calculation?
 
 
 
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