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Physics: Post your doubts here!

C

controlled.chaos

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  1. Assalam o alaikum people!
    Im in AS level. And I have my mid year papers frm 8 dec. :3 so kindly help me in these questions.. thanks already. :')


    1. A mass of a liquid of density ρ is thoroughly mixed with an equal mass of another liquid of density
    2ρ. No change of the total volume occurs.
    What is the density of the liquid mixture?
    A 4/3ρ B 3/2ρ C 5/3ρ D 3ρ

    2.
    4 Pollen grains are suspended in a liquid and are illuminated strongly. When observed under a
    microscope they are seen to be in continuous random motion.
    What is the reason for this?
    A convection currents in the liquid
    B evaporation of the liquid
    C molecules of the liquid colliding with the pollen grains
    D pollen grains colliding with each other
 
Thought blocker

Thought blocker

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Physicist said:
Wslm.
view qu 114 at
http://physics-ref.blogspot.com/2014/11/physics-9702-doubts-help-page-21.html
for the 1st question.
the other one will be added soon
Click to expand...
controlled.chaos said:
  1. Assalam o alaikum people!
    Im in AS level. And I have my mid year papers frm 8 dec. :3 so kindly help me in these questions.. thanks already. :')


    1. A mass of a liquid of density ρ is thoroughly mixed with an equal mass of another liquid of density
    2ρ. No change of the total volume occurs.
    What is the density of the liquid mixture?
    A 4/3ρ B 3/2ρ C 5/3ρ D 3ρ

    2.
    4 Pollen grains are suspended in a liquid and are illuminated strongly. When observed under a
    microscope they are seen to be in continuous random motion.
    What is the reason for this?
    A convection currents in the liquid
    B evaporation of the liquid
    C molecules of the liquid colliding with the pollen grains
    D pollen grains colliding with each other
Click to expand...
1)
daum_equation_1416731604424.png
2) Brownian motion, the molecules of liquid collide with the molecules of the pollen grains.
 
S

Sewz44

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Do you all know good websites for AS level physics.....
I need a good note of OSCILLATIONS AND WAVES MODULE......
So can anyone upload a good note for me please?
 
TheValiantGuardian

TheValiantGuardian

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yaar. Unrelated but does anyone know if Physics Cambridge Endorsed Coursebook for A Level 2nd Edition is available in its Pirated Version? Lahore pls.
Thanks.
 
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