Biology; Chemistry; Physics: Post your doubts here!

[amna shah]

http://www.xtremepapers.com/papers/...nal O Level/Physics (5054)/5054_s10_qp_42.pdf

can anyone please explain or draw roughly the part 4 (C) i,ii,iii and 4 E ... thanks

 

[xxvvyy]

so we have to measure 25 cm from the prism(refracted ray) and draw the eye?

 

[kitecrystal]

its simple if its , first know that there are altogether 10 horizontal divisions. OK
then if u keep 2ms (milli second) then total lenth will be 2 x 10 20 ms.
If 15 Hz in 20 ms this much wave will come (15 x 20 x10^-3) that comes 0.3 waves
when set to 5ms then (15 x 50 x 10^-3) that comes 0.75 waves
when 10ms (15 x 100 x106-3) that comes 1.5 waves
so 10 ms gives one complete wave

Hope I made myself clear ..

thanku sooo much

 

[MustafaMotani]

so we have to measure 25 cm from the prism(refracted ray) and draw the eye?

25 cm from the object

 

[MustafaMotani]

thanku sooo much

no need

 

[xxvvyy]

hm......? i dont get u

 

[MustafaMotani]

http://www.xtremepapers.com/papers/CIE/Cambridge International O Level/Physics (5054)/5054_w10_qp_41.pdf

can any explain 4 (B) .. how we have to draw it ?

cone shaped on clay with nip of pencil
just blunt but less deep than the clay with nip on the model in whick back of pncil was forced

 

[a.abid]

I think it was C

i guess i did C also :|

 

[MustafaMotani]

hm......? i dont get u

Ok read it carrefully
first make refracted ray which u must have made in previous part.. use scale to see which point on refracted ray is 25cm far from object . (keep one corner of scale o object and rotate other)
mark eye therr

 

[xxvvyy]

so we have to go through the rays? i mean by measuring?

 

[MustafaMotani]

so we have to go through the rays? i mean by measuring?

Yeah it should be atleast 25 cm thats what ques said

 

[MustafaMotani]

http://www.xtremepapers.com/papers/CIE/Cambridge International O Level/Physics (5054)/5054_s10_qp_42.pdf

can anyone please explain or draw roughly the part 4 (C) i,ii,iii and 4 E ... thanks

As far I can comprehend... join p3 and p4 and extend it till comes in contact wid circumfernce of circle, then join line 1 wid this line...
I cant tell u how to draw normal like this on forum sorry
for line 3 its complete symmetrical reflection that is u have to draw complete reflection of line 1

Hope it helps

 

[MustafaMotani]

http://www.xtremepapers.com/papers/CIE/Cambridge International O Level/Physics (5054)/5054_s10_qp_42.pdf

can anyone please explain or draw roughly the part 4 (C) i,ii,iii and 4 E ... thanks

Oh yes normal is radius.. draw the line from the centre of block to the poin at which line 1 enters block

 

[amna shah]

As far I can comprehend... join p3 and p4 and extend it till comes in contact wid circumfernce of circle, then join line 1 wid this line...
I cant tell u how to draw normal like this on forum sorry
for line 3 its complete symmetrical reflection that is u have to draw complete reflection of line 1

Hope it helps

yeah thanks for those parts .. but im really confused about drawing the normal and the measurement of the angle ... if u can briefly explain the procedure, i can try my best to understand

 

[MustafaMotani]

yeah thanks for those parts .. but im really confused about drawing the normal and the measurement of the angle ... if u can briefly explain the procedure, i can try my best to understand

I told it read my previous post.. it is radius ... from centre of the block to the point wher line 1 enters the circle

 

[MustafaMotani]

yeah thanks for those parts .. but im really confused about drawing the normal and the measurement of the angle ... if u can briefly explain the procedure, i can try my best to understand

angle will be angle between normal and incident ray (line 1)

 

[ashiqbal]

Vogue: hope this helps:

 

[MustafaMotani]

Vogue: hope this helps:
View attachment 11308

u kidding It surely helps ..
where did u get that pic from anyway.. ??

 

[Spidey21]

Its biology..
what was the use of proteins in the body ??
to synthesize proteins or cell growth

you are using proteins to synthesize proteins??? lmao!!

 

[xxvvyy]

If they tell to plot a graph, should it be a straight line or a curve?