Physics Help HERE ONLY !!

[IGSTUDENT]

Do we need to cover Lenz laws?

[Q80BOY]

some1 wanted help wid lenz's law..im really bad at explaining physics
 superb ppt attached check it out

Do we need to cover this lenz law?

ya, its important, didnt u do electromagnetism ??

[nid404]

some1 wanted help wid lenz's law..im really bad at explaining physics
 superb ppt attached check it out

Do we need to cover this lenz law?

 we do have electromagnetic induction.....and so yeah we gotta cover lenz's law

[nid404]

and here's w8 u should look at before leaving ur house for the physics paper.

[Q80BOY]

and here's w8 u should look at before leaving ur house for the physics paper.

thanks a lot 

+REP

[Friends]

I have ine more problem.

n = sinr/sini OR n = sini/sinr in any form
1.33 = sinr/sin40 OR sinr = 1.33 × sin40
Any value between 58.68° – 60° inclusive

This is from mark scheme but still i dont get answers.
Anuone plzzz help

[Q80BOY]

Refractive index (1.33) = Sine R / Sine (40)

Find Sine R,

so, 1.33 x Sine 40

use ur calculator for the answer, it should be in the range 58.68 - 60

hope this helps 

[VIP_93]

can i plz have da mark scheme of jun-nov 2000 and jun 2001
thx in advance

[Q80BOY]

can i plz have da mark scheme of jun-nov 2000 and jun 2001
thx in advance

they're on scribid @ this link : www.scribd.com/doc/3183763/Physics-Answers-1993-2002

hope this helps 

[Ibiza279]

hey can anyone explain me the sub zero and the lower fixed point.
n wats lenz law again ?

[Friends]

Can anyone help me with waves topic
I am totally lost.
By the way Thanks Q80BOY. I totally forgot to do sin inverse.

[Ibiza279]

sure wat are ur questions bout waves ?

[Friends]

sure wat are ur questions bout waves ?

I am totally lost. I need to know pattern of waves in water when they pass thru a gap.

[SGVaibhav]

guys i was taught there are two types of sound graphs u need to know

one is displacement/time   and the other is displacement/lenth.

can anyone elaborate more about these two types of graphs.

[Ibiza279]

ok its simple

when water waves pass thru a gap, if the gap's length is equal to the wave's wavelength then there will b a spherical diffraction,
but if the wavelength of the wave is lower than the gap of the length then the waves formed will hav defraction on their extreme edges, they will look like straight lines that are bent on the edges.

we don't hav the diffraction of waves such that the length of the gap is smaller than the length of the wavelength.

remember the top two points all the best