Physics MCQs thread.

[yubakkk]

@hatexam
let density of p be p and q is q
they are in equilribrum so
pressure at bottom are equal so
pg2x+qgx=pg2x
which gives p/q=1/2
so ans is A
HAVE U UNDERSTAND if not i willl xplain detalily

 

[Hateexams93]

@hatexam
let density of p be p and q is q
they are in equilribrum so
pressure at bottom are equal so
pg2x+qgx=pg2x

why it equals to pg2x ?? i didn't get this part and its not giving the right answer

 

[Hateexams93]

and what will be the diffrenence if it wasn't in equilibrium ?

 

[mickysharif]

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

Why is upthrust less than magnitude also by, if its at rest shouldn't all forces going up be equal to done, i.e option B

 

[xHazeMx]

@hatexam
let density of p be p and q is q
they are in equilribrum so
pressure at bottom are equal so
pg2x+qgx=pg2x

why it equals to pg2x ?? i didn't get this part and its not giving the right answer

they are in equilibrium. so,

pg2x = qgx
2p = g
p/g = 1/2

 

[Hateexams93]

and what will be the difference if it wasn't in equilibrium ?????? whats gonna change about it ?

 

[xHazeMx]

and what will be the difference if it wasn't in equilibrium ?????? whats gonna change about it ?

it should be in equilibrium to find the ratio of both densities

 

[Hateexams93]

why its D ???? and how does its velocity changes aslan

 

[xHazeMx]

why its D ???? and how does its velocity changes aslan

the vertical component of acceleration is ALWAYS CONSTANT .. g = 9.81 ms^-2

 

[Hateexams93]

oh..its acceleration..i thought they were talking about velocities ..what about velocities ?

 

[xHazeMx]

oh..its acceleration..i thought they were talking about velocities ..what about velocities ?

vertical component of velocity decreases as object is moving along the given path, becomes zero at the maximum height and then increases down the path. horizontal component of velocity is always constant

 

[Zishi]

Bored, man! Dunno what to do 'til 8 june...

 

[hassam]

register for bio lolx..

 

[xHazeMx]

Bored, man! Dunno what to do 'til 8 june...

solve past papers and study for the exam .. i guess
to tell u the truth, i cant wait till i finish the exams and ENJOY THE SUMMER. but there is no way else to spend the time now except by studying and only studying. anyways, its a matter of 5 days.

 

[Hateexams93]

Bored, man! Dunno what to do 'til 8 june...

:roll: :roll: :roll: :roll: :roll: can u help me then ?

 

[Zishi]

Bored, man! Dunno what to do 'til 8 june...

solve past papers and study for the exam .. i guess
to tell u the truth, i cant wait till i finish the exams and ENJOY THE SUMMER. but there is no way else to spend the time now except by studying and only studying. anyways, its a matter of 5 days.

register for bio lolx..

LOL!

 

[Zishi]

Bored, man! Dunno what to do 'til 8 june...

:roll: :roll: :roll: :roll: :roll: can u help me then ?

lol. Sure Sure. Everyone will help you here. :good:

 

[girlscampisra]

please solve this one..

 

[Hateexams93]

what do we have to know about crystalline materials ?

 

[Zishi]

please solve this one..

A. The main mistake which candidates do is that they assume initial velocity to be zero. Let it be u, make two equations. solve them simultaneously, and you'll get the answer.