Biology; Chemistry; Physics: Post your doubts here!

[ashiqbal]

Listen, No paper discussion on here.

main nai kaha tha naa kai salman daantay ga!

 

[ashiqbal]

SO a question from everyone: HOW are you going to prepare for Physics???

for me, i am going to go year by year, doing from 2005 till 2011! got 2 days! will post any difficult MCQs and questions that i encounter, and request that u do the same, as it will not only clear your concepts, but also help others!

 

[amna shah]

does anyone remember the temperature values in the last question in which we had to plot the graph ?? pm me if u can

 

[ashiqbal]

does anyone remember the temperature values in the last question in which we had to plot the graph ?? pm me if u can

no paper discussion as per the rules of XPF and our mods commands!

Listen, No paper discussion on here.

 

[Aneeq]

SO a question from everyone: HOW are you going to prepare for Physics???

for me, i am going to go year by year, doing from 2005 till 2011! got 2 days! will post any difficult MCQs and questions that i encounter, and request that u do the same, as it will not only clear your concepts, but also help others!

i've got BS tomorrow :/ dont know how to sttudy for physics

 

[Dukeofwin]

Two days aren't enough to cover up Physics on 25th! Have to depend upon my previous revisions!
Things are going to get heavy now! Hope I can cover them up!
I can score 80-85% easily in Theory but I'm cursed for MCQ's I cant cross the 75% barrier!
Any tips on it!

 

[haha101]

Two days aren't enough to cover up Physics on 25th! Have to depend upon my previous revisions!
Things are going to get heavy now! Hope I can cover them up!
I can score 80-85% easily in Theory but I'm cursed for MCQ's I cant cross the 75% barrier!
Any tips on it!

use the brain ! take your time ! agar kisi Q mei doubt hai tou post it here
! n agar exam mei doubt ho tou ! baraber wala zindabad

 

[sunflower789]

pleasee somebody help me with this

Q: A student drops a table tennis ball in air
What happens to the velocity and to the acceleration of the ball during the first few seconds after the release?
A. velocity increases,acceleration increases
B. velocity decreases,acceleration decreases
C. velocity increases,acceleration decreases
D.velocity decreases,acceleration increases

 

[bogus]

pleasee somebody help me with this

Q: A student drops a table tennis ball in air
What happens to the velocity and to the acceleration of the ball during the first few seconds after the release?
A. velocity increases,acceleration increases
B. velocity decreases,acceleration decreases
C. velocity increases,acceleration decreases
D.velocity decreases,acceleration increases

d

 

[Fallen316]

pleasee somebody help me with this

Q: A student drops a table tennis ball in air
What happens to the velocity and to the acceleration of the ball during the first few seconds after the release?
A. velocity increases,acceleration increases
B. velocity decreases,acceleration decreases
C. velocity increases,acceleration decreases
D.velocity decreases,acceleration increases

d

its C, how can it be D ?

 

[sunflower789]

d

why is it D or C? thts wht i dont understand....shudnt acceleration increase as velocity increases??

 

[Fallen316]

why is it D or C? thts wht i dont understand....shudnt acceleration increase as velocity increases??

wait, you're thinking of it the wrong way.
ever heard of terminal velocity ?
think of it and u'll know it.

 

[ashiqbal]

i've got BS tomorrow :/ dont know how to sttudy for physics

Awww!! the same thing happened to me, i got bio one day, then computer the second!

 

[ashiqbal]

pleasee somebody help me with this

Q: A student drops a table tennis ball in air
What happens to the velocity and to the acceleration of the ball during the first few seconds after the release?
A. velocity increases,acceleration increases
B. velocity decreases,acceleration decreases
C. velocity increases,acceleration decreases
D.velocity decreases,acceleration increases

C

 

[ashiqbal]

why is it D or C? thts wht i dont understand....shudnt acceleration increase as velocity increases??

as a body falls, the air resistance increases, decreasing acceleration! as air resistance becomes equal to velocity, terminal velocity is reached!
Always remember! resistance will cause acceleration to decrease if a constant force is applied!

 

[sunflower789]

wait, you're thinking of it the wrong way.
ever heard of terminal velocity ?
think of it and u'll know it.

ya i know terminal velicity is when the velocity is constant....and acceleration is zero when velocity is constant so doesnt this make both directly proportional??

 

[sunflower789]

as a body falls, the air resistance increases, decreasing acceleration! as air resistance becomes equal to velocity, terminal velocity is reached!
Always remember! resistance will cause acceleration to decrease if a constant force is applied!

ohhh so acceleration and velocity arent directly proportional.?

 

[Dukeofwin]

3 Things that always happen in a chemistry exam,

1.Shit, was zinc soluable or insoluable in excess?
2.Damn, cant remember that is iron more reactive or copper?
3.what is the formula of moles, mass upon Mr or Mr upon Mass?

 

[Dukeofwin]

use the brain ! take your time ! agar kisi Q mei doubt hai tou post it here
! n agar exam mei doubt ho tou ! baraber wala zindabad

Cheating is out of question, invigilators here are crazy! I was withheld for 10 mins after exam just because one of my friends looked at me when the papers were being collected! And i wasn't the culprit at all!
And it would be good managerial test for me!

 

[sweetsis]

how does a capacitor and a transistor work?/