Physics P1 and P2 Discussions

[Fraze]

Pressure is force pe unit square area, isn't it?
So when given more hea pt the are will increase so force pushing the piston outside will be more than force pushing it inside. So it will move out until both forces are balanced. At that time the inner pressure and atmospheric pressure will be same otherwise the forces want be balanced. So volume increased and pressure did not change.

oh so close...

 

[Suchal Riaz]

Really? I used a really stupid logic and got the same as this in the end

Which logic?

 

[Suchal Riaz]

oh so close...

This is what happens in physics mostly out logic is correct but incomplete. W leave some thing behind and get wrong conclusion. Don't worry bro.

 

[Suchal Riaz]

As there would be just one lamp remaining, it would get more voltage and hence the current would decrease Plz don't laugh at me.

At least u did not debate that u are wrong. Other people Internet debate knowing they are wrong.

 

[Kamihus]

At least u did not debate that u are wrong. Other people Internet debate knowing they are wrong.

As soon as i saw the answers, the other 2 were far more popular and immediately thought "Nothing to do here"

 

[Haris Sal11]

no look, it was clearly stated in the question the the syringe can move easily, it means that the volume would certainly increase but why would the pressure increase, we cant link it with it, it will remain unchanged.

Pressure decreases, Volume increases.

 

[Shadow]

I m pretty sure those marks at the top of paper are the ans for the computer to match ... Too bad answers r in front of us yet v cannot decipher them

 

[Kamihus]

I m pretty sure those marks at the top of paper are the ans for the computer to match ... Too bad answers r in front of us yet v cannot decipher them

Can't we use a bar-code detector or something

 

[Fraze]

I m pretty sure those marks at the top of paper are the ans for the computer to match ... Too bad answers r in front of us yet v cannot decipher them

lol the same thing occured to me when i got my first mcq sheet i.e. the chem

 

[Fraze]

Can't we use a bar-code detector or something

electronic items are not allowed except calculators. #yourargumentisinvalid

 

[thementor]

i hate this i first shaded 250000 and then i shaded 750000 why me?!?!

dont worry bud...

Pressure is force pe unit square area, isn't it?
So when given more hea pt the are will increase so force pushing the piston outside will be more than force pushing it inside. So it will move out until both forces are balanced. At that time the inner pressure and atmospheric pressure will be same otherwise the forces want be balanced. So volume increased and pressure did not change.

yes my deduction was correct

 

[Suchal Riaz]

dont worry bud...
yes my deduction was correct

We are physicists brother

 

[thementor]

We are physicists brother

agreed bro...

 

[Suchal Riaz]

Pressure decreases, Volume increases.

I did not expect so many candidates to give the wrong answe.
Suchal Riaz said: ↑
Pressure is force pe unit square area, isn't it?
So when given more hea pt the are will increase so force pushing the piston outside will be more than force pushing it inside. So it will move out until both forces are balanced. At that time the inner pressure and atmospheric pressure will be same otherwise the forces want be balanced. So volume increased and pressure did not change.

 

[redd]

Pressure decreases, Volume increases.

ermm any logic for this? pressure doesn't increase for the increase in temperature, i do remember such a question in past papers when volume increased so there was no change in pressure, well, i dnt remember it exactly.

 

[Kamihus]

ermm any logic for this? pressure doesn't increase for the increase in temperature, i do remember such a question in past papers when volume increased so there was no change in pressure, well, i dnt remember it exactly.

Yep pressure remains constant,confirmed

 

[abd1336480007]

I don't have time to read whole thread as I have to prepare for add maths and computer so please tell me why my argument is wrong by giving a reason why my logic is wrong.

As the truck has returned from the top, the overall change in g.p.e will only be on sand. Mass of only sand will be taken in formula.
The current will be divided into 5 other parallel circuits so each appliance won't get high current so only socket will be over heated
As the bulb has been broken, the volt meter will now be in parallel to whole battery so it's reading will increase. The resistance of bulb and volt meter in parallel was less than resistance of volt meter alone so due to more resistance the ammeter reading will decrease.
As the diver was in high speed and slowed down it's kinetic energy is changing into heat and as the height was decreasing the g.p.e was changing into heat energy. No potential energy was changed into kinetic energy. So overall equation will reduce to g.p.e + k.e --> heat energy
Saad Mughal Buland Iqbal Haris Bin Zahid

our thots and ans are twins

 

[altox876]

our thots and ans are twins

Did the question about the diver ask for overall energy change or what?

 

[abd1336480007]

Did the question about the diver ask for overall energy change or what?

having gone thru bio mcqs yesterday , i have my head just filled with bio so sorry i cn be of no help here

 

[Shadow]

Yeah that was the key word....I myself was gonna shade 75000000, but just said overall in the nick of time.

I dont quite remember my answer ... Did u calculate G.P.E by adding both the weight of sand n the trolley (or watevr it was) ?