Physics: Post your doubts here!

[ashcull14]

can u kindly answer the 2nd question also?..

 

[ZaqZainab]

can u kindly answer the 2nd question also?..

Well i having trouble in that is the answer B?

 

[TheStallion-Reborn]

Can someone please help me with the concept of deriving physical equations??

 

[usama321]

Help plx wid full a-z explanation

Calculate the percentage uncertainties for all the values. The one with the largest percentage uncertainty should cause the highest uncertainty in the answer
A: .002/2.043 * 100
B: (2*0.02)/.52 *100 (multiply the uncertainty with 2 due to the exponent)
C: .01/19.62 * 100
D: 0.2/5.2 * 100

The answer should be B as it has the highest percentage uncertainty.

Can someone please help me with the concept of deriving physical equations??

Do you have physics pacific book? You will find a good explanation there... If you don't, i'll try explaining it here.

 

[TheStallion-Reborn]

Do you have physics pacific book? You will find a good explanation there... If you don't, i'll try explaining it here.

Yes I do. Can you please refer me to the page number?

 

[usama321]

Yes I do. Can you please refer me to the page number?

Page 9

 

[usama321]

Check out the examples too

 

[TheStallion-Reborn]

can someone please explain how to calculate phase differnce? #waves

 

[Hassan Ali Abid]

can someone please explain how to calculate phase differnce? #waves

Phase difference = (x/lamda).360 or (x/lamda).2pie , where lamda = wave length and x = the horizontal displacement of the point from where new wave will be drawn.

 

[TheStallion-Reborn]

Phase difference = (x/lamda).360 or (x/lamda).2pie , where lamda = wave length and x = the horizontal displacement of the point from where new wave will be drawn.

you mean that if i have to find the phase difference of 2 points within wave, X will be the horizontal distance between those 2 points?

 

[Hassan Ali Abid]

you mean that if i have to find the phase difference of 2 points within wave, X will be the horizontal distance between those 2 points?

Yes ...

 

[Hassan Ali Abid]

TheStallion-Reborn see it ..i hope u will understand it

 

[TheStallion-Reborn]

TheStallion-Reborn see it ..i hope u will understand it

Thankyouu!!!

 

[goodluckayesha]

i have a few doubts plz someone kindly explain (A2 questions)
http://papers.xtremepapers.com/CIE/...and AS Level/Physics (9702)/9702_s09_qp_4.pdf Q10 part cii mark scheme says 9v how does the answer come?
http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s10_qp_42.pdf Q10b
http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s11_qp_41.pdf Q9biii the V- decreases as temp is increasing but y is vout -9 or +9 y not taking +5v into account as in part Q9bii?

 

[Someone2]

can someone give a model answer for this question?? the marking svheme doesnt make sense...
Explain why values of gravitational potential are always negative whereas values of
electric potential may be positive or negative.

 

[Hassan Ali Abid]

can someone give a model answer for this question?? the marking svheme doesnt make sense...
Explain why values of gravitational potential are always negative whereas values of
electric potential may be positive or negative.

due attration and repulsion the electric potential values are +ve and -ve where as in gravitational potential there's always attraction so everytime the -ve sign is included.

 

[TheStallion-Reborn]

any clue why are the 2013 physics a levels exam papers not available on xtreme papers?

 

[Hazel SD]

Explaination for this question plz

 

[Igcse stuff]

Can someone help me with this question....how do you calculate the resultant force?

 

[Igcse stuff]

Hey guys, can someone help me with notes on forces....