Physics, Chemistry and Biology: Post your doubts here!

[hard_worker]

aha i said the mass increased

 

[dubi2pro]

what was the angle of incidence? u got?

 

[hard_worker]

my prob was in the magnetic field Qn what was the direction of the force ??and wat were we supposed to draw on the diagram

 

[Phoenix Blood]

i wrote it ddecrresed!

Mass is the amount of matter, why will it inrease or decrease?

 

[dubi2pro]

and i did this according to fleming left hand rule!

 

[hard_worker]

i drew the arrow downwards, and the force right side to the side of paper!

Angle of incidence? what u got?

22.08

 

[hard_worker]

i drew the arrow downwards, and the force right side to the side of paper!

Angle of incidence? what u got?

nothing can be to the rightt either upwards or downwards

 

[hard_worker]

what formula u used for this value? sin i/ sin r?

ya

 

[dubi2pro]

i got 42

 

[Phoenix Blood]

ya

Angle of incidence= 30 degrees
Refractive index= 1.33

Since the ray is travelling from glass to air, angle will go away from the normal and should be more than 30. So, can that be correct?

 

[Phoenix Blood]

i got 42

Me too

 

[hard_worker]

but remember that angle in air is always greater than in meduim so it wont work

thats wrong! we had to use sin r/ sin i, it said from water to air!

 

[dubi2pro]

but remember thet angle in air is always greater then in meduim so it wont work

how?

 

[dubi2pro]

but remember thet angle in air is always greater then in meduim so it wont work

 

[Phoenix Blood]

but remember that angle in air is always greater than in meduim so it wont work

Right, so 42 is greater than 30. 22 is not :B)

 

[Gamedos]

well i got v1 and it was somehow easier than v2
that is what i heard

 

[eureka!]

You guys are cruel. You know Xtremepapers is pretty popular and the authorities could have it pulled down if it leads to any leakage... can't you just wait for a few more hours before discussion?

 

[Phoenix Blood]

You guys are cruel. You know Xtremepapers is pretty popular and the authorities could have it pulled down... can't you just wait for a few more hours before discussion?

There's no one giving Variant2 now. One'd think YOU're the BIG all-in-all autho.

 

[ahmed faraz]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Physics (0625)/0625_s07_qp_1.pdf
q5

 

[Phoenix Blood]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Physics (0625)/0625_s07_qp_1.pdf
q5

Mass of half the bottle= 1.30-1.90
Mass of full bottle= mass of half bottle*two.
Correct?