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iTeachChem

A Study Community for Everyone and Everything. We have weekly sessions on Spirituality, Math and Science! JEE, NEET prep? All doubts are crowdsourced. Hare Krishna!

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Radiation

How to find the temperature of the black screen?
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Explain with mechanism :)

Problem in Mainly Step A
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Collector plate, photoelectric effect

How does collector plate affect stopping potential? What condition does the solution (2nd image) state?
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flux

why dont we do phi(out) + phi(in)
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Solutions - tiny doubt in a question

So here's a problem from the chapter solutions. I want to solve it using Ya/Yb = (Xa/Xb)(P0A/P0B)... I've reached up to this eqn: P0bxy= Pa - Pay - Pax+ Paxy. What I don't understand is where did that x term go in the original expression of Pa. Is it cuz we're taking x = 0 as it is an exp for Pa? I guess that is it but would like to confirm....
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Quadratic, roots raised to higher powers

What's the plan here? What should I do and why
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Wave optics

here he said Rays will interfere constructively but in the solution he just draws them parallel , the rays done even meet , shouldnt the rays converge at sensor
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LMVT

In the solution of the question, it is written that since f''(x) <0, f'(x) < 0 and f(x) is decreasing function which is not true right? f'(x)>0 AND f''(x) < 0 is also possible ig? So is there another method for solving this question?
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gif, fpf

find k such that 2x + {x} = k[x] has exactly 5 soutions where [.] is gif and {.} is fpf. i did get an ans but it didnt match with the ans key...and i was a bit confused too..can anyone explain how it is to be done...

Electrostatics - Potential doubt

I understand that for a sphere V is KQ/R when r<R and KQ/r when r>R But why is it such that the induced charges +q and -q on the surfaces of the conductor have no effect on the point outside(C)? Yet it does for points inside(A)? Thank you...
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Time Period Gravitaion

in this question the teacher did F = MW^2 R and then did W = 2pi/T i did F = MV^2/R and then did R/V to find T but i dint get the ans , we cant use this method?...
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variable charge density

a large non uniformly charged slab of thickness d is placed in the yz plane as shown. its charge density rho varies as rho=ax^2 C/m^3 . find electric field at (l,0) i. l > d ii. l < d...

Chem eqbm relation

Simplify na hora. Feel like 7 mins on this question is too much for an attempt
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cell

how is this ans right? shouldnt it be only schleiden and shwann
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Gravitation Simple Question

i cant get the answer to this simple questions gp = GM/(4R/3)^2 = 9GM/16R^2 Gq = GM/(xR)^2...
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electrochem doubt

How is H+ conc. 10^-12??
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Properties of matter, film of liquid in ring

I tried a method which was wrong for fairly obvious reasons in hindsight and now I'm confused.
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