Physics: Post your doubts here!

[hela]

Please help
Paper 4 m/j 09 Q11 b) (iii)
http://papers.xtremepapers.com/CIE/...and AS Level/Physics (9702)/9702_s09_qp_4.pdf


Answer
http://papers.xtremepapers.com/CIE/...and AS Level/Physics (9702)/9702_s09_ms_4.pdf

 

[hope4thebest]

Why emf induced in the secondary coil not in phase with emf in the primary coil?

 

[hela]

Please help
Paper 4 m/j 09 Q11 b) (iii)
http://papers.xtremepapers.com/CIE/...and AS Level/Physics (9702)/9702_s09_qp_4.pdf


Answer
http://papers.xtremepapers.com/CIE/...and AS Level/Physics (9702)/9702_s09_ms_4.pdf

hela, 5 minutes agoEditDeleteReport
#9359Reply

 

[sma786]

Hey..
Does anybody want to practise paper 4 papers with me?
If yes please inbox.. I'll tell you my bbm or kik or whatevrr

 

[sma786]

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w12_qp_41.pdf

Question 1 part b please..

 

[Monojit Saha]

Please help
Paper 4 m/j 09 Q11 b) (iii)
http://papers.xtremepapers.com/CIE/...and AS Level/Physics (9702)/9702_s09_qp_4.pdf


Answer
http://papers.xtremepapers.com/CIE/...and AS Level/Physics (9702)/9702_s09_ms_4.pdf

hela, 5 minutes agoEditDeleteReport
#9359Reply

Thing is, the ray is being absorbed twice and is being total internally reflected once.
So first I is being absorbed so we have 0.39I being transmitted to the bone and muscle boundary. 0.33 times 0.39 is then being internally reflected so we have 0.33 x 0.39I. Then again when it is moving from the boundary to the outside, it is again being absrbed so we have 0.39 x 0.33x 0.39 I which is why they squared the 0.39.

 

[Student12]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s05_qp_4.pdf
Question 4 c(i)

 

[A star]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s05_qp_4.pdf
Question c(i)

question?

 

[Student12]

question?

Question 4

 

[A star]

Question 4

its simple use the formulae indicate in b
f=1/2pie(sqr.rt(Apg/M))
f=1/T the time period of one wave
A=pie (r)^2
density is given g is 9.8 so find m

 

[Alazne Diamond]

O/N 2013 41

 

[boxfire1995]

Can anyone please explain to me the emission spectra? Please?

 

[hellangel1]

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w13_qp_43.pdf
Q9 bii, how to make the graph?

 

[itallion stallion]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w12_qp_41.pdf

Question 1 part b please..

Centripetal force =mv*2/r

Gravitational force=GMm/R*2
Gracitational force provides centripetal force.
Put forces equal.find Velocitput velocity in Kinetic energy formula!

 

[itallion stallion]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w13_qp_43.pdf
Q9 bii, how to make the graph?

See page 465.graph drawn there.its posted be 'that's me'

 

[A star]

View attachment 42994
O/N 2013 41

these points
ultrasound waves produced using the crystal
reflected from inside the body
reflection happens at boundry of different structures like bone and muscle
reflection is detected amplified and processed
explain about attenuation
alpha beta scan

 

[Alazne Diamond]

these points
ultrasound waves produced using the crystal
reflected from inside the body
reflection happens at boundry of different structures like bone and muscle
reflection is detected amplified and processed
explain about attenuation
alpha beta scan

thnxx
bt it wud b better if u can write da whole thing..........cuz m confused how to write evrything for 6 marks

 

[A star]

thnxx
bt it wud b better if u can write da whole thing..........cuz m confused how to write evrything for 6 marks

there is a big difference btw principle of production and working . in one you have to explain about how waves are produced and in the other how waves are used in detection

 

[A star]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s03_qp_4.pdf
Question2 .Can someone explain this to me?????????????

i dont get these questions too :/ daredevil Rutzaba

 

[Alazne Diamond]

there is a big difference btw principle of production and working . in one you have to explain about how waves are produced and in the other how waves are used in detection

ooooooooooo ok.............thnxx a lot!!!