Physics MCQs thread.

[Zishi]

Hello, so here's now Physics MCQ thread. Post your doubts, we all will try to help you...

 

[hassam]

 

[Zishi]

I guess B. But i think it's wrong - completely lost hope after chem...

 

[hassam]

its B.....yar leav that 3 marks...u cn get easily 97+ with marks u told me for theory

 

[Zishi]

no its B.....yar leav that 3 marks...u cn get easily 97+ with marks u told me for theory

Well, hoping to get better...Thanks anyway.

 

[hassam]

 

[Zishi]

D. It'd be good if you could erase answers before attaching them...

 

[hassam]

 

[hassam]

K SORRY NEXT TIME ANS LL BE ERASED

 

[Zishi]

A, as written on the question. :roll:

 

[hassam]

 

[hassam]

A molecule of mass m travel with a velocity of u toward molecule of mass 4m and eleatic collision occurs...wat is v of molecule of mass m after the collision

 

[Zishi]

Maybe A.

 

[Zishi]

A molecule of mass m travel with a velocity of u toward molecule of mass 4m and eleatic collision occurs...wat is v of molecule of mass m after the collision

Is this question complete? IS mass of 4m at rest?

 

[hassam]

YA iTS a...upthrust i always less in magnitude...ya thats at rest...i dint posted options cos ans was marked

 

[Zishi]

A molecule of mass m travel with a velocity of u toward molecule of mass 4m and eleatic collision occurs...wat is v of molecule of mass m after the collision

1.5U

 

[hassam]

no ....its -3/5 u

 

[Zishi]

no ....its -3/5 u

Oh , yeah. Sorry, was mistake by a calculator.

 

[Hateexams93]

Help plz

 

[xHazeMx]

Help plz

its A, small masses will obtain higher kinetic energies in order to make the total momentum equal to zero. m1u1 + m2u2 = m1v1 + m2v2