Messages posted by tarinbansal

good one. cool man!!!!!!

good but its given in many books.

Cool method! good job man.

cool man! Good job.

A small object is placed at the centre of the bottom of a cylindrical vessel of radius 3 cm and height 4 cm filled completely with water. Consider the ray leaving the veesel through a corner. Suppose this ray and the ray along the axis of the vessel are used to trace the image. Find the apparent depth of the image and the ratio of real depth to the apparent depth under the assumptions taken. Refractive index of water=1^.33.

good job

Someone please reply .

A cylindrical vessel of diameter 12 cam contains 800

cm³ of water. A cylindrical glass piece of diameter 8 cm and height 8 cm is placed in the vessel. If the bottom of the vessel under the glass piece is seen by the paraxial rays, locate its image. The index of refraction of glass in 1.5 and that of water is 1.33.

Ans-

I applied the formula µ₁/v - µ₂/u = 0.

So my doubts are-

1) The 'v' I get is measured from bottom or from interface?

2) I am getting the answer by applying the formula just once, but when the observer is in the air above the water then why don?t we take double refraction? (i) from glass to water and (ii) from water to air?

Its simple.

Max charge on uncharged capacitor can be Q/2 as charge is conserved & both capacitors have equal capacitance.

Now treat the charged capacitor as a battery so that it becomes a growth RC circuit for uncharged capacitor.

Net capacitance= C/2.

Therefore time constant=RC/2.

now Q=Q_max(1-e^(-t/RC))

Therefore Ans= Q/2 ( 1-e^(-2T/RC))

Rate me if you find this correct.

Please prefer some books for inorganic chemistry and which topics are important in inorganic from the point of view of IIT-JEE-2008.

Please tell me if the rumour that IIT screening will be held in december and mains will be a subjective paper is true?

Which books are preferable for subjective problems in physix, chemistry, maths?

Can you please shortlist some topics in PCM which are important for JEE-2008?

K transparent slabs are arranged one over another. The refractive indices of the slabs are µ₁, µ₂, ....... µ_k and the thicknesses are t₁, t₂, t₃,..... t_k . An object is seen through this combination with nearly perpendicular light. Find the equivalent refractive index of the system which will allow the image to be formed at the same place.

Hey I am from Brilliant tutorials.
My teacher know some profs from IIT. They have asked them and the true news is that there are no prelims in dec. dont worry.

GO TO

http://brilliant-tutorials.com/iitjeesolutions/iitjeesolutions07.shtml

Rate me if it helps.

Hi my email id is

tarinbansal@gmail.com

When there are 2 OH groups on a carbon we say that they are unstable due to repulsion between them but in chloroform there are 3 Cl groups on carbon. How come chloroform is stable? Won't the 3 Cl groups repel each other?

My name is Tarin Bansal.

RPWE-681

Don't even think of using Morrison Boyd and IL Finar as you will just find yourself confused at the end. First of all the language of these books is very tough and secondly they contain many things which are not of our use and will ultimately confuse you. These are the books of time of Baba Adam.

Use L.G. Wade. It is very student friendly book with very simple english and very good illustrations. Trust me. I am good at organic chemistry and I won't give anyone wrong advice.

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Let me make it clear to you that first of all inductive effect is an absolute effect not relative. Secondly inductive effect is just an imagination of scientists as they have to give some mechanism for reactions. they found that a carbon attached to a benzene is electrophilic so they said that benzene shows -I effect. You can't give a reason of why does it show -I effect just like as you can't say that why CH_{3 being not so electron rich shows +I effect.}

_{I hope this info will help you. Rate me if it does.}

MeCOOCOMe can be easily attacked by a nucleophile as the carbon in this compound is very electrophilic due to excessive resonance with O.

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