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    (Original post by tangotangopapa2)
    A general question: Do you loose mark for giving your answers to greater significant figures than required?
    Generally, yes, it's always up to 1 sig fig greater than the numbers they provide.
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    (Original post by tangotangopapa2)
    A general question: Do you loose mark for giving your answers to greater significant figures than required?
    Unless the SF requirement is specfically stated in the question, then no.
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    Please can someone explain why the answer to question 2 isn't D.

    https://a4942901ab27cf2817f7a4f7497d...%20Physics.pdf
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    (Original post by Connorbwfc)
    Please can someone explain why the answer to question 2 is D.

    https://a4942901ab27cf2817f7a4f7497d...%20Physics.pdf
    the answer is B?
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    (Original post by SuruthiG)
    the answer is B?
    Sorry, I mean't why isn't the answer D?
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    (Original post by Connorbwfc)
    Sorry, I mean't why is the answer D?
    As the block gets hotter relative to its surroundings it radiates heat to the air.
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    (Original post by 16characterlimit)
    As the block gets hotter relative to its surroundings it radiates heat to the air.
    Exactly.

    Why is overestimating the mass of the block a more likely occurence that this?

    Ignore me i've realised why I am wrong.
    Would my answer lead to them getting a value greater than the textbook value?
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    (Original post by Connorbwfc)
    Exactly.

    Why is overestimating the mass of the block a more likely occurence that this?

    Ignore me i've realised why I am wrong.
    Would my answer lead to them getting a value greater than the textbook value?
    Overestimated mass would mean a lower heat capacity, since Q/mDt = c, higher m means lower c.
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    (Original post by 16characterlimit)
    Overestimated mass would mean a lower heat capacity, since Q/mDt = c, higher m means higher c.
    Wouldn't a higher m give you a smaller c according to your equation?
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    (Original post by demotivated)
    Wouldn't a higher m give you a smaller c according to your equation?
    sorry, I thought that, I wanted to write that but it didnt come out
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    Hey everyone...would appreciate if anyone would help me in this question:

    Olympus Mons is the highest mountain on Mars. The height of Olympus Monsis 22 km, which is 0.6% of the radius of Mars.The change in gravitational field strength from the bottom to the top of Olympus Mons is
    A – 0.6%
    B – 1.2%
    C + 1.2%
    D + 0.6%
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    Energy is supplied to a fixed mass of gas in a container and the mean squared speed ofthe gas molecules doubles.The absolute temperature of the gas
    A remains constant
    B increases by a factor of 2
    C increases by a factor of square root 2
    D increases by a factor of 4

    The correct answer is C but why?
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    Minus 1.2%
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    (Original post by Rahatara Sadique)
    Hey everyone...would appreciate if anyone would help me in this question:

    Olympus Mons is the highest mountain on Mars. The height of Olympus Monsis 22 km, which is 0.6% of the radius of Mars.The change in gravitational field strength from the bottom to the top of Olympus Mons is
    A – 0.6%
    B – 1.2%
    C + 1.2%
    D + 0.6%

    F=GM/r^2.

    Let r^2 for Mars=1
    so r^2 for Mountain=1.006.

    Sub in these numbers and you get the answer (obviously a negative as it decreases)
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    (Original post by Rahatara Sadique)
    Energy is supplied to a fixed mass of gas in a container and the mean squared speed ofthe gas molecules doubles.The absolute temperature of the gas
    A remains constant
    B increases by a factor of 2
    C increases by a factor of square root 2
    D increases by a factor of 4

    The correct answer is C but why?
    Are you sure the answer is C?

    I would've expected B due to 0.5m<c^2>=1.5kT.
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    (Original post by demotivated)
    Unless it was a ratio of energies, then they would give you the spring constant as well.
    Ok thanks - so k is the spring constant?
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    (Original post by Connorbwfc)
    Are you sure the answer is C?

    I would've expected B due to 0.5m<c^2>=1.5kT.
    The answer is B, I did this question earlier today.
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    Name:  Screen Shot 2016-06-27 at 10.53.20 PM.png
Views: 190
Size:  27.4 KBcan someone explain this to me please?
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    (Original post by Ppatel0)
    Minus 1.2%
    Can you please explain why that's the answer? Thankyou
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    (Original post by Connorbwfc)
    Are you sure the answer is C?

    I would've expected B due to 0.5m<c^2>=1.5kT.
    Yes, I have checked the marking scheme again and it says C.
    But mean square speed is proportional to temperature...
 
 
 
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