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    Chemistry How should I proceed with the reactions?

    The question: How will the first reaction take place for instance? Is CH3S- the nucleophile? Will it be added to the oxygen and the other hydrogen(H+) get attached to the other oxygen, with the double bond shifting to the center(C2-C3)? If this is right then where will CN- will attack?
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    What is a "Torsional Constant"?

    I have a bit confusion as I overlooked a few things(my bad): I thought the given angular velocity(ω0) shouldn't change but here as in the solutions I see they're considering ω0 to change with ω = √(C/I) [as ω0= ωβsin(ωt)]! Please explain me a bit here.
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    What is a "Torsional Constant"?

    Yes, I agree to this analogy too.
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    What is a "Torsional Constant"?

    Since this pendulum is spinning it is coming to rest and then going the opposite way(harmonic motion i mean) so there is some some force in the wire which causes it to accelerate in the opposite direction, and therefore there must be some angular acceleration, right?
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    What is a "Torsional Constant"?

    Thanks again! So Cθ = Iα is the equation, and therefore ω^2=C/I.
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    What is a "Torsional Constant"?

    Thanks, now I understand it! What are your views on the first equation [ ω=√(C/I) ]? That equation seems familiar to the other ones like ω=√(mgd/I), I'm confused on what exactly C means.
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    What is a "Torsional Constant"?

    The question was: I will also include the solution: So, what is the justification of the first formula [ω=√(C/I)]? I know how to derive simple harmonic equations, this one as I guess is probably similar? But I cannot connect as to how C is used exactly. And the second formula [ω'=ωβ], I...
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    Confusion on the distribution of charge

    So, can I conclude from this is that the charge will distribute in such a way that there will opposite charge along the patch facing the charge q such that the electric field by it(charge q) will not be expressed inside the conductor/block and the charge on the the other patch of the block will...
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    Confusion on the distribution of charge

    I couldn't get what you meant by 'multiplication by constant', is it the net charge (q1+q2) you mean?
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    Confusion on the distribution of charge

    No. Until there is some charge in the cavity, I think. Another clarification I wanted to make on the second para, first line(of the main question body): Actually this line has typos in it and I regret for not checking will I was typing it. I wanted to type: "I know the charges induced on the...
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    Confusion on the distribution of charge

    The charges are q1,q2 & q. P,Q,O1,O2 refer to positions only. This is a conducting sphere with cavities containing charges. I'm interested in knowing how the charge should be distributed in the sphere. I know the charges induced on the charges of the sphere should be equal and opposite to the...
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    Power of a particle on a wave

    Yes, I agree with this
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    Power of a particle on a wave

    Yes, at a point the power is zero but over a region the power is zero as energy flux is zero, right?
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    Power of a particle on a wave

    But this is not a standing wave, but shouldn't the power be zero across two points? You said power should be zero assuming it as a standing wave
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    Power of a particle on a wave

    This is not a standing wave, but I'm confused as you said "if the wave is stationary";there are two types of waves- moving waves and stationary waves, right?
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    Power of a particle on a wave

    Yes, the analogy is quite clear! @DrClaude yes I think that might also be the right answer.
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    Power of a particle on a wave

    Okay, so the energy across two points never changes- rate of change of energy is zero - power is zero. Thanks a lot for explaining:)
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    Power of a particle on a wave

    Since this wave is moving or its particles are, can I say there is a constant power across this string and is constant at any region(or point?) over the string as the energy transmitted is conserved?
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    Power of a particle on a wave

    I don't know I'm confused myself. It probably is asking about the difference in power at the points (my concepts regarding this is a bit shallow); I don't know this makes any sense either. But, in simple terms the rope or string does carry some power ?
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    Power of a particle on a wave

    I've marked the right answers. They mainly indicate at power carried by the particles being zero, and here is my doubt- why should it be zero? Shouldn't it have some definite value? I do understand that the kinetic energy is max at the y=0 and potential energy is max at y=A, but I don't know...
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    Confusion on the magnitude of magnetic fields

    All I knew till now is that by applying ampere's law the net magnetic field at a point is zero if it does not encloses any current. For solenoids as I looked up, the derivation also uses ampere's law, however here the loop encloses current due to it's position which I've tried to show in the...
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    Confusion on the magnitude of magnetic fields

    So, where is exactly ampere's law applicable? If the current is moving around the pipe (due to rotational motion as here), we cannot apply it? Does the current have to be perpendicular to the imaginary circle we consider in ampere's law?
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    Confusion on the magnitude of magnetic fields

    Here, the correct options are A,D. Solution: I got A as answer as ∫ B.dl=µI. But, the answer to the question says that it is a solenoid and therefore Bx=0 for point P. Here I'm a bit confused. I know this system resembles a solenoid in some ways, then By must have some finite value, but...
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    Chemistry A dilemma with stereochemistry

    The answer to this question are the ones I've marked as shown above. But I'm confused as to how? The first option is okay since it has a chiral carbon with no plane or line of symmetry and shows geometric isomerism too. In the third option, the compound shows Geometrical isomerism but i fail to...
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    Chemistry (A wrong question?) Does Ni2+ have different t2g eg configuration for wfl and sfl?

    Yes, I missed out that point earlier. I need to strengthen my concepts on CFT :)
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    Chemistry (A wrong question?) Does Ni2+ have different t2g eg configuration for wfl and sfl?

    Well so it means we are only considering octahedral compounds here? Then it is always sp3d2 for Ni2+ compounds. Then what are the energy levels involved in tetrahedral geometry, if they are not t2g and eg? I did search for [Ni(NH3)4]2+ and found that people asking questions on whether it is para...
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    Chemistry (A wrong question?) Does Ni2+ have different t2g eg configuration for wfl and sfl?

    I was expecting Ni2+ to be present also in the answer as it can give dsp2 and sp3 configuration. [Ni(CN)4]2- and [Ni(NH3)4]2+ have dsp2 and sp3 respectively, right?
  28. G

    How to expand this ratio of polynomials?

    yes I did that as @haruspex has mentioned already :)
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    How to expand this ratio of polynomials?

    I had made a silly error in calculating the sum of the series before which you mentioned; you are right indeed! I didn't visualize the expression could be like this!
  30. G

    How to expand this ratio of polynomials?

    Yes, I never thought about this! this actually makes it way easier! I tried dividing the 1+x^n by 1+x also as others said in this section and I did find n can take only odd values. @ehild I'm not sure about the sum you said, it is different from my question; it would work for 1+x+x^2+...+x^(n-1)?
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    Problems with this rotational motion question (ant walking around a rotating ring)

    So, the first equation is for the rotation for line joining the center of masses. Okay. But, if the bug moves upwards (let's say) then the ring will rotate clockwise and so the direction of v1 and ωR would be same, right? Wouldn't they be of opposite signs? You did say the rotation will be...
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    Problems with this rotational motion question (ant walking around a rotating ring)

    I've marked correct answers above. Have a look at the solutions: How is the first equation justified? Shouldn't v2 and ωR be of opposite signs? What is v1? And how is it equal to v2? My biggest problem is the source of v1 since the ring is not having vertical displacement, then what is v1?
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    How to expand this ratio of polynomials?

    I could simplify the expressions in the numerator and denominator to (1+x^n)/(1+x) as they are in geometric series and I used the geometric sum formula to reduce it. Now for what value of n will it be a polynomial? I do get the idea for some value of n the simplified numerator will contain the...
  34. G

    How to get the magnetic moment for this loop?

    No as I already told in the explanations section I have found the torque by the the equation @Delta2 has mentioned; is it impossible to calculate the magnetic moment for this loop? The link you have provided contains formula and theories beyond my scope (that's the reason i don't go to...
  35. G

    How to get the magnetic moment for this loop?

    About this figure, the current in the opposite wires are parallel (and not anti-parallel). So, for instance for the first option the torque is zero; but I wanted to know what is the magnetic moment of this loop. Since I rely only on formula I've have no idea how to compute for this one.
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    Questions on Capacitors again

    I didn't quite get much of the question as well; so can we say this question is absolutely wrong? However the solution of this question is interesting, just putting it up for you guys to see, i literally can't find any logic how they derived it.
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    Questions on Capacitors again

    Well i don't you to solve the question for me but I want you to clarify the concepts pertaining to this question. My question is how do I write a equation for the circuit since the there is same charge on one of the capacitors. While writing the equation should i put the voltage across the...
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    Different types of hyperbolas and their properties

    @BvU looks neat; but here is the problem how do I know what is the equation of the transverse axis? And how do I calculate the quantities like eccentricity, latus rectum length? What should be my approach?
  39. G

    Different types of hyperbolas and their properties

    I know the hyperbola of the form x^2/a^2-y^2/b^2=1 and xy=c; but coming across this question I'm put in a dilemma of how to proceed with calculating anything of it - say eccentricity or latus rectum or transverse axis as said. How to generalize a hyperbola (but i don't want a complex derivation...
  40. G

    Chemistry Evolution of ammonia in cases

    the stronger one but how should I know which one is strong enough to react?
  41. G

    Chemistry Evolution of ammonia in cases

    No except urea all the other are bases, some strong and some weak. Well I don't have much of a idea on how much strong the base has to be in order to abstract a proton from NH4+
  42. G

    Chemistry Evolution of ammonia in cases

    I would guess NaNH2 as Nh2- is a stong base like NaOH? I'm not quite sure - i cannot understand the basic idea behind this question.
  43. G

    Chemistry Evolution of ammonia in cases

    Well the reaction is NH4Cl + NaOH --> NaCl + H2O + NH3 But what has NaOH to do with it?
  44. G

    Chemistry Evolution of ammonia in cases

    I don't really have any idea how to approach this, but the answer says that it is the compounds which are more basic than ammonia liberate it.
  45. G

    Determining the power of frictional force

    Yes, i agree that's the reason behind the power being constant; it is actually zero.
  46. G

    Determining the power of frictional force

    I can say that the frictional force always against the rolling sphere and the velocity is increasing for the ball. So The dot product F.v keeps on getting more and more negative, so how can the Pf remain constant? Well the velocity increases along the incline and the force of gravity is down...
  47. G

    A confusing question on capacitors and voltages across them

    Yes, i actually get it now; here C1V1=C2V2, and therefore Va=9-5=4V which i had wrongly considered 0 before. Thanks for the help!
  48. G

    A confusing question on capacitors and voltages across them

    Well since the current flowing through the other circuit of which 3 ohm is common is 3A so the voltage across the resistance is 3*3=9V which I figured but the real problem I'm having is what is the voltage across the capacitors, how to apply KVL exactly- I'm having confusions regarding the...
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