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    (Original post by sweetlikesugar)
    quick question, when we exhale does the diaphragm relax?? and intercostal muscles relax aswell?
    Diaphragm relaxes, intercoastal muscles contract.
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    (Original post by sweetlikesugar)
    quick question, when we exhale does the diaphragm relax?? and intercostal muscles relax aswell?
    yes.
    and then the volume increases so the pressure decreases so air comes in to bring pressure back to normal again while external intercostal muscles relax. and internal intercostal muscles contract
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    i still need help on q 10 on the section 2 past paper ... im dead tomorrow
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    INSPIRATION

    The diaphragm contracts and flattens downwards.

    The external intercostal muscles contract, pulling the ribs up and out

    this increases the volume of the thorax this increases the lung and alveoli volume

    this decreases the pressure of air in the alveoli below atmospheric (Boyle's law)air flows in to equalise the pressure


    EXPIRATION

    The diaphragm relaxes and curves upwards

    the external intercostal muscles relax, allowing the ribs to fall

    this decreases the volume of the thorax

    this decreases the lung and alveoli volume

    this increases the pressure of air in the alveoli above atmospheric (Boyle's law)air flows out to equalise the pressure.

    The abdominal muscles contract, pushing the diaphragm upwards

    The internal intercostal muscles contract, pulling the ribs downward

    This gives a larger and faster expiration, used in exercise
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    http://www.admissionstests.cambridge..._Section_2.pdf

    Ok desperately need help on q's 7 and 10 please! *panics*
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    the introductory paper can any1 do section 1 question 10 or section 2 question 9 please?
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    (Original post by Hyeree)
    INSPIRATION

    The diaphragm contracts and flattens downwards.

    The external intercostal muscles contract, pulling the ribs up and out

    this increases the volume of the thorax this increases the lung and alveoli volume

    this decreases the pressure of air in the alveoli below atmospheric (Boyle's law)air flows in to equalise the pressure


    EXPIRATION

    The diaphragm relaxes and curves upwards

    the external intercostal muscles relax, allowing the ribs to fall

    this decreases the volume of the thorax

    this decreases the lung and alveoli volume

    this increases the pressure of air in the alveoli above atmospheric (Boyle's law)air flows out to equalise the pressure.

    The abdominal muscles contract, pushing the diaphragm upwards

    The internal intercostal muscles contract, pulling the ribs downward

    This gives a larger and faster expiration, used in exercise
    There is no way this much detail will be required in the BMAT, they ask for GCSE level knowledge:mute: .
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    Next question id like an explanation of...section 1, q18 and 2007 past paper

    bob buys 50 paving slabs of 0.7 by 0.7 m. using whole slabs he is only able to cover an area which is twice as long as it is wide but will not cover the whole patio.
    if his patio garden is 5m wide, how wide is the flower bed?...

    This question just doesn't seem to make any sense :-S

    help?:-)
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    (Original post by Kelly^2)
    There is no way this much detail will be required in the BMAT, they ask for GCSE level knowledge:mute: .
    Actually IMO that's not too detailed-it's just the process step by step.Also, do we have to know much about capacitors??
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    (Original post by b9muslove)
    http://www.admissionstests.cambridge..._Section_2.pdf

    Ok desperately need help on q's 7 and 10 please! *panics*
    Seconded.
    anyone?
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    (Original post by Kelly^2)
    There is no way this much detail will be required in the BMAT, they ask for GCSE level knowledge:mute: .
    lol ofc not. but people were asking....
    and im tired. and need to still study physics.
    ******* physics.
    i am going to sleep at 9.30 or 10 at the latest.
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    (Original post by Donc, je suis.)
    Actually IMO that's not too detailed-it's just the process step by step.Also, do we have to know much about capacitors??
    no all you need to know is that they store electrical charge and can release this charge (discharge) at any desired time.
    wish everyone the best of luck for tomorrow, really hope it's doable!
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    Q7. 1500 turns = 250V
    P=IV V=P/I = 500/10 = 50V
    X turns = 50V
    250/5=50
    therefore 1500/5 = 300 turns
    hope that helps
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    Can any help me on this one question? I'm not sure what equation to use:

    "A ball is tossed downward off the roof of a building with an intial velocity of 5.0 m/s. It travels for 10.0 sec before it hits the ground. How far has the ball travelled in kilometers after 10.0 sec? Answer with the appropriate significant digits. Assume that air resistance is negligible and gravity is 10.0 m/sec^2"

    I'm unsure whether to use s= ut+1/2at^2?
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    Can any help me on this one question? I'm not sure what equation to use:

    "A ball is tossed downward off the roof of a building with an intial velocity of 5.0 m/s. It travels for 10.0 sec before it hits the ground. How far has the ball travelled in kilometers after 10.0 sec? Answer with the appropriate significant digits. Assume that air resistance is negligible and gravity is 10.0 m/sec^2"

    I'm unsure whether to use s= ut+1/2at^2?
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    Need Help on Question 18 Section 1
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    (Original post by Hyeree)
    lol ofc not. but people were asking....
    and im tired. and need to still study physics.
    ******* physics.
    i am going to sleep at 9.30 or 10 at the latest.
    hmmm....ive had quite a large dose of caffene today, so its gonna be about 1 or 2am for me !
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    Is the correct answer 3.5m?
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    (Original post by Asthenia)
    Can any help me on this one question? I'm not sure what equation to use:

    "A ball is tossed downward off the roof of a building with an intial velocity of 5.0 m/s. It travels for 10.0 sec before it hits the ground. How far has the ball travelled in kilometers after 10.0 sec? Answer with the appropriate significant digits. Assume that air resistance is negligible and gravity is 10.0 m/sec^2"

    I'm unsure whether to use s= ut+1/2at^2?
    Do you need to know this level of physics ? Isnt this in AS Physics/ M1
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    im guessing for Q10 its A because its a 1:2 reaction so the volume has to be twice as much but im not too sure . sorry
 
 
 
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