Join TSR now and get all your revision questions answeredSign up now

AQA Physics PHYA5 - Thursday 18th June 2015 [Exam Discussion Thread] Watch

    Offline

    3
    ReputationRep:
    (Original post by gcsestuff)
    Anyone doing core 4 edexcel Tuesday is it morning or afternoon?


    Posted from TSR Mobile
    I don't even want to know when that is lol


    Posted from TSR Mobile
    Offline

    3
    ReputationRep:
    (Original post by Mehrdad jafari)
    That's not good for a healthy break


    Posted from TSR Mobile
    I know!!! But I don't have time to cook a healthy meal with all this study and so few hours so I'll let myself off!
    Offline

    3
    ReputationRep:
    (Original post by Sbarron)
    I know!!! But I don't have time to cook a healthy meal with all this study and so few hours so I'll let myself off!
    True, i need to cook for myself too . If i don't have something nutritious then i quickly become hungry again or loose concentration.


    Posted from TSR Mobile
    Offline

    3
    ReputationRep:
    (Original post by Mehrdad jafari)
    True, i need to cook for myself too . If i don't have something nutritious then i quickly become hungry again or loose concentration.


    Posted from TSR Mobile
    You know everything anyway!
    Offline

    3
    ReputationRep:
    (Original post by Sbarron)
    You know everything anyway!
    Haha, i know you're being sarcastic


    Posted from TSR Mobile
    Offline

    1
    ReputationRep:
    When calculating the mass defect do we need to include the mass of the electrons ( in u ) ?
    Offline

    2
    ReputationRep:
    Name:  ImageUploadedByStudent Room1434394645.908944.jpg
Views: 134
Size:  82.8 KB

    Can someone check that this a correct diagram of an E/M wave, thanks!


    Posted from TSR Mobile
    Offline

    2
    ReputationRep:
    (Original post by Klaxoii)
    Name:  ImageUploadedByStudent Room1434394645.908944.jpg
Views: 134
Size:  82.8 KB

    Can someone check that this a correct diagram of an E/M wave, thanks!


    Posted from TSR Mobile
    Spot on. I would try to put little right angles on the diagram just to be 100%

    Another thing is that electric and magnetic fields are of equal magnitude


    Posted from TSR Mobile
    Offline

    1
    ReputationRep:
    Yooooooo do we need to know how to derive those total kinetic energy equations
    Offline

    2
    ReputationRep:
    (Original post by gcsestuff)
    Spot on. I would try to put little right angles on the diagram just to be 100%

    Another thing is that electric and magnetic fields are of equal magnitude


    Posted from TSR Mobile
    Thanks dude!


    Posted from TSR Mobile
    Offline

    2
    ReputationRep:
    (Original post by Klaxoii)
    Thanks dude!


    Posted from TSR Mobile
    I think radio waves and em waves etc will come up this year and there isn't much they can ask I don't think so just make sure you do that question about the radio wave being polarised


    Posted from TSR Mobile
    Offline

    3
    ReputationRep:
    (Original post by ChiefKeef)
    Yooooooo do we need to know how to derive those total kinetic energy equations
    I think we do so my teacher says anyway altho ive never seen a question on it :confused:

    Posted from TSR Mobile
    • Thread Starter
    Offline

    3
    ReputationRep:
    (Original post by ChiefKeef)
    Yooooooo do we need to know how to derive those total kinetic energy equations
    By total kinetic energy do you mean

    

\dfrac{3}{2} NkT

    ?

    I've only ever seen this used?



    Posted from TSR Mobile
    Offline

    2
    ReputationRep:
    Can anyone post a simple derivation of the kinetic model


    Posted from TSR Mobile
    Offline

    1
    ReputationRep:
    (Original post by gcsestuff)
    Can anyone post a simple derivation of the kinetic model


    Posted from TSR Mobile
    Assumptions in order to establish a kinetic theory for an ideal gas:

    • Collisions between molecules and the walls of the container are elastic.
    • Intermolecular forces are negligible except during a collision.
    • Energy is only kinetic and not stored as potential.
    • The volume occupied by the molecules is negligible in comparison to the volume of the container.
    • Time spent in collision is negligible when compared to time spent between collisions.
    • Molecules are in continuous random motion.

    Hope this helps!
    Offline

    3
    ReputationRep:
    (Original post by TheBeardedGuy)
    Assumptions in order to establish a kinetic theory for an ideal gas:

    • Collisions between molecules and the walls of the container are elastic.
    • Intermolecular forces are negligible except during a collision.
    • Energy is only kinetic and not stored as potential.
    • The volume occupied by the molecules is negligible in comparison to the volume of the container.
    • Time spent in collision is negligible when compared to time spent between collisions.
    • Molecules are in continuous random motion.

    Hope this helps!
    That's great . Though sometimes we are expected to explain why a particular assumption is made. I've got a written note on them. If you haven't then i will write them out on here


    Posted from TSR Mobile
    Offline

    2
    ReputationRep:
    Apparently some PHYA5 papers were present in the van that was stolen the other week, so it looks like we're going to be sitting the reserve one!
    Offline

    3
    ReputationRep:
    (Original post by sam_97)
    Apparently some PHYA5 papers were present in the van that was stolen the other week, so it looks like we're going to be sitting the reserve one!
    We will know this on the day of the exam


    Posted from TSR Mobile
    Offline

    1
    ReputationRep:
    Can someone just clarify for me please: Crms = root mean speed
    (Crms) = root mean speed squared


    Posted from TSR Mobile
    Offline

    2
    ReputationRep:
    (Original post by moontheloon)
    Can someone just clarify for me please: Crms = root mean speed
    (Crms) = root mean speed squared


    Posted from TSR Mobile
    Crms is the root mean square speed, measured in metres per second.

    (Crms)^2 is the mean square speed, measured in metres squared per second squared.
 
 
 
Poll
Which pet is the best?

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Quick reply
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.