Recent content by Yukoel

Hello FaraDazed, For part C you are asked to find t for parallel vectors.What you are doing is making them equal (by equating both components ).When two vectors are parallel their components are proportional. I think this should give you the correct answer. If you use t=1 as you got in C...

Well can't we just use (n-3-1)C(3-1) ?(The number of distributing n things in r groups with each of the being nonempty is (n-1)C(r-1) )Here n=n-3 and r=3. Maybe I misunderstand the problem but the people are treated as distinct right? So the copies of the same would be for n=6 ACE;CEA;and...

Hello mfb, I think we can skip the casework too .I meant that one can see the remaining n-3 members have to be distributed after selecting the 3 required.(So as to fit in the table).Selecting just one member allows for the gaps to be numbered according to the number of elements within(As you...

Hello, Thanks for clarifying this. Well the way I can think of it is doesn't utilize finding the common difference and /or common ratio .Try writing them separately as nth(n=5,7,and 37 as given) terms of the Geometric and arithmetic sequence (Don't be disheartened by the number of unknowns :)...

Hello Government$ Do you mean that a,b,and c are parts of an arithemtico-geometric sequence(As in saying that they can be represented as the product of corresponding terms of an arithmetic and geometric series) or implying that there exist separate (not to be sure) arithmetic and...

Hello LilyY, I think you mean R'=R+α(2(L+x'cos(ωt))+l)(effective resistance of the whole circuit)and I=V/R'=-B'ωlx'sin(ωt)/(R+α(2(L+x'cos(ωt))+l)). I suppose you are trying to measure potential difference between the ends of rod right?In other words you are trying to find the V across a...

Hello Pranav, You can skip the casework too.Just notice that after selecting all the persons required(=3) you are left with n-3 persons and they are distributed in the gaps between adjacent members (there are 3 gaps too right?) ,each gap being nonempty.So you are left with the job of...

Hello Pranav, I think what Infinitum means is that you need to superimpose velocities/accelerations due to c.o.m and those relative to it. I have drawn a diagram for a 2 dimensional case in the image below. http://img842.imageshack.us/img842/3331/da0822968d2847a9bda0d4d.png Hoping this...

Hello tt2348, Leave the square terms unchanged and consider all possible values of the square of any integer mod 5 .There are three squares here() .How will you get them to get an expression divisible by 5 ?There lies the answer that one of the square terms has to be divisible by 5. Hoping...

Hello Pranav-arora, You are taking measurements from the instantaneous center of rotation right?First of all to confirm whether the given answer is correct or not by treating the same from the center of mass and ground frame.I think it should be correct.(though I haven't calculated) As far...

Yes. regards Yukoel

V is a function of the source charge only. What you are deriving is potential energy.Sign seems fine. You can directly use the expression for potentials considering the point charges separately.Evaluating the integral is correct but unnecessary in your problem. regards Yukoel

Hello again! If the circle and the ellipse touch or have a common tangent (two formulations of the same same statement) the point of contact has to be the end of longer axis of ellipse.I think this is what it means. By the way this isn't related to physics I think so i think you have posted...

Hello mps, I assume the statement states constraint of the tangency condition.If they were to intersect the statement has no say.Do you seek a mathematical proof of this?If yes you have to show your attempt first. regards Yukoel

Hello Does the diagram look like the image in the link? http://img684.imageshack.us/img684/404/37304acd6959474e821ad8c.png regards Yukoel