Physics P1 and P2 Discussions

[Shadow]

HE WASNT GAINING K.E.....FOR CRYING OUT LOUD..........BUT FOR HIM TO MOVE...........HE MUST HAVE K.E........... SO G.P.E-->K.E+HEAT.......

Relax relax It just a single MCQ. Luk, he dived into pool from sum point. This means he had G.P.E at that point. As he descended, K.E increased. In pool, he slowed down. So overall his energy changed from K.E + G.P.E > Thermal

 

[Shadow]

Guys, Was the work done in the extension question to be found by multiplying 90 or 180?? People say both are correct ..

Did it with 90

 

[Shadow]

13 is wrong. Fuse blowing out is not a danger. Over-heating in the socket.

Ok bhai ghalti hogayi. Ab jaan lo gay kya saare meri?

 

[thementor]

Relax relax It just a single MCQ. Luk, he dived into pool from sum point. This means he had G.P.E at that point. As he descended, K.E increased. In pool, he slowed down. So overall his energy changed from K.E + G.P.E > Thermal

I know...but for this question I know I am not wrong.

 

[Shadow]

I know...but for this question I know I am not wrong.

No one can be sure. Marking Scheme aane k baad he pta chale ga

 

[Rohan O]

So now.... the answer to the phy MCQ as to what happens to the voltmeter and ammeter readings if the filament in lamp 1 broke..... is that..... Ammeter reading decreases and voltmeter reading increases.... those of you who did it wrong...... Join the club!!

haha i second you for that, i did the same mistake!

 

[Haris Sal11]

better than P2

Same.

 

[Snowysangel]

Yes....

But why? 180 was the last value so didn't we have to use .3 and 180to find the answer. Besides the mean value for length must have been .15 m since they were directly proportional...does anyone remember the limit of proportiobality btw?

 

[Bilal Khan]

But why? 180 was the last value so didn't we have to use .3 and 180to find the answer. Besides the mean value for length must have been .15 m since they were directly proportional...does anyone remember the limit of proportiobality btw?

yeah , it was 800 N .

 

[Snowysangel]

yeah , it was 800 N .

Ate u sure,"? Wasn't it 830 or 3300 or something?

 

[Bilal Khan]

Ate u sure,"? Wasn't it 830 or 3300 or something?

i'm damn sure..
it was 800 N.

 

[redd]

Your answer is correct, don't worry.

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.

 

[Suchal Riaz]

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

 

[Kamihus]

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.

Yes,it will remain unchanged.

 

[Saad Mughal]

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 wint get high 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. Tree reform g.p.e + k.e --> heat energy
Saad Mughal Buland Iqbal Haris Bin Zahid

The first one seems correct. Although now, I believe I was incorrect to choose 7500000.
Yeah, that's correct.
Don't know, a lot of debate on this topic has gone on.
I agree. Please explain this to others.

 

[Suchal Riaz]

The first one seems correct. Although now, I believe I was incorrect to choose 7500000.
Yeah, that's correct.
Don't know, a lot of debate on this topic has gone on.
I agree. Please explain this to others.

So u mean all I wrote in my post seemed logical to u as well?
others think it was bullshit

 

[thementor]

But why? 180 was the last value so didn't we have to use .3 and 180to find the answer. Besides the mean value for length must have been .15 m since they were directly proportional...does anyone remember the limit of proportiobality btw?

133.33cm

 

[thementor]

The first one seems correct. Although now, I believe I was incorrect to choose 7500000.
Yeah, that's correct.
Don't know, a lot of debate on this topic has gone on.
I agree. Please explain this to others.

yes my answer for that lorry one is correct...i knew i wasnt wrong....

 

[Suchal Riaz]

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

Any one please? @thermentor

 

[Saad Mughal]

So u mean all I wrote in my post seemed logical to u as well?
others think it was bullshit

The first one seems logical BECAUSE they said OVERALL change. I failed to pick this.
The second one is correct BECAUSE the only danger was that the socket would overheat (a fuse melting is not a particular threat neither was it possible).
The third one. Bah. Loads of discussion has been done on this.
Fourth one. Well, that's what I think!