Biology; Chemistry; Physics: Post your doubts here!

[simranlalchand]

can anyone explain the question of winter 2012 qp 42 question 2?
http://papers.xtremepapers.com/CIE/Cambridge International O Level/Physics (5054)/5054_w12_qp_42.pdf

 

[fatima0000]

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Physics (5054)/5054_s11_qp_42.pdf
Q no 2 (b)

help me please

 

[Kamihus]

can anyone answer the question of winter 2012 qp 42 question 2?

2755 will be used as smallest specific heat capacity is to be measured
2755*60/(53-19)
4861.76
suitable sig.figures: 4860

 

[simranlalchand]

2755 will be used as smallest specific heat capacity is to be measured
2755*60/(53-19)
4861.76
suitable sig.figures: 4860

thank you very much

 

[HarithAslam]

does anyone know why the pendulum is displaced by only a small angle when recording T?

 

[Suchal Riaz]

does anyone know why the pendulum is displaced by only a small angle when recording T?

show question first.

 

[Hskk]

When drawing a circuit, is the switch drawn following the negative terminal of the cell or positive?

 

[AhsanAfzal]

When drawing a circuit, is the switch drawn following the negative terminal of the cell or positive?

negative

 

[Snowysangel]

Plz anyone help
http://papers.xtremepapers.com/CIE/Cambridge International O Level/Physics (5054)/5054_s12_qp_42.pdf
Q 2b

negative

Are you sure it's not the positive? Cause I've seen it drawn right next to the smaller line of the battery terminal quite a number of times

 

[Young Stunner]

Are you sure it's not the positive? Cause I've seen it drawn right next to the smaller line of the battery terminal quite a number of times

Easy. The question says that three experiment let them be A,B & C are done. In each of them 20 oscillations are measured. Find the average time T for one oscillation
Answer
First of all find the average of the the three experiments then divide the average by 20
Did you get it Please let me know

 

[Al-Anoud]

Could someone explain both the parts of a to me? View attachment 25230

lol! id give a lame answer ti such a qs. if it ever showed up on my exam, like 'to prevent the bench from breking due to the heavy load.;p they say physics is common sense...but they also say common sense isnt very common. --dont right this answer plz--

 

[Snowysangel]

Easy. The question says that three experiment let them be A,B & C are done. In each of them 20 oscillations are measured. Find the average time T for one oscillation
Answer
First of all find the average of the the three experiments then divide the average by 20
Did you get it Please let me know

Cant u add the time taken for all 3 experiments and divide that by 60 instead?

 

[Snowysangel]

lol! id give a lame answer ti such a qs. if it ever showed up on my exam, like 'to prevent the bench from breking due to the heavy load.;p they say physics is common sense...but they also say common sense isnt very common. --dont right this answer plz--

Haha I checked the marking scheme it should be clamped tightly so that the wire would be secure and wouldn't move on it own. In case the wire breaks, one should wear safety goggles, as a broken wire is hazardous for the eyes

 

[ijlalm]

Hi man, how are you? All good? Ok, good.

So do you want to use this site or not? If yes, then kindly stay in your limits and follow the rules.

Otherwise, I've scared the crap out of many morons here, who, just like you, also had Baaps (whatever this word means) on their sides. So, you won't be the first one.[/quot

Hi man, how are you? All good? Ok, good.

So do you want to use this site or not? If yes, then kindly stay in your limits and follow the rules.

Otherwise, I've scared the crap out of many morons here, who, just like you, also had Baaps (whatever this word means) on their sides. So, you won't be the first one.

you dont know the meaning of Baap?? it means walid

 

[ijlalm]

Does any one know why do we take 20 oscillations?? for a pendulum swing..

 

[Al-Anoud]

o

Haha I checked the marking scheme it should be clamped tightly so that the wire would be secure and wouldn't move on it own. In case the wire breaks, one should wear safety goggles, as a broken wire is hazardous for the eyes

oh! thnxx man! tht was quite helpful.ive got a physics exam 2moro. nd im trying to "study for it"

 

[Al-Anoud]

Does any one know why do we take 20 oscillations?? for a pendulum swing..

it would be difficult to record the time for one swing since a stopwatch is being used. AND a typical "A*" ans. would be, 'to get more reliable results by dividing the time taken by the no. of swings.

 

[Zoya Shahab]

Traffic is two way in phloem vessels. Can anyone explain me how is it two way??? In which directions does food travel and why??

 

[Al-Anoud]

http://www.xtremepapers.com/revision/gcse/biology/transport_in_plants.php
hope this helps

 

[Asif1223]

Hi man, how are you? All good? Ok, good.

So do you want to use this site or not? If yes, then kindly stay in your limits and follow the rules.

Otherwise, I've scared the crap out of many morons here, who, just like you, also had Baaps (whatever this word means) on their sides. So, you won't be the first one.

you always need a powerful administrator to threaten some stupids like these........HA HA HA