Recent content by donaldparida

  1. donaldparida

    B Methods of integration: direct and indirect substitution

    @Stephen Tashi , I read about it here: http://math.feld.cvut.cz/mt/txtd/3/txe3da3b.htm.
  2. donaldparida

    B Methods of integration: direct and indirect substitution

    I have seen two approaches to the method of integration by substitution (in two different books). On searching the internet i came to know that Approach I is known as the method of integration by direct substitution whereas Approach II is known as the method of integration by indirect...
  3. donaldparida

    Resonance pi bond problem

    @jim mcnamara, Nope this is not homework. I was just trying to figure out the steps to draw resonance structures of any compound, that is, the rules for "delocalising" the electrons.
  4. donaldparida

    Resonance pi bond problem

    @DrDu, but the electrons are delocalised (due to which they can move). Aren't they? If these rules are wrong then how does one draw the resonance structures of a compound?
  5. donaldparida

    Resonance pi bond problem

    @mjc123 why does this happen?
  6. donaldparida

    Resonance pi bond problem

    @mjc123 , could you please explain this line in your post: "whose pi electrons can move somewhere else to allow the new pi bond to be formed"
  7. donaldparida

    Resonance pi bond problem

    In my chemistry study material a set of rules to draw resonance structures are given. They are: (1) Only electrons move. The nuclei of the atoms never move. (2) The only electrons that can move are pi electrons (electrons in pi bonds) and lone-pair electrons. (3) The total number of electrons...
  8. donaldparida

    Bullet trajectory: Aiming a gun

    The direction of \vec{U}?
  9. donaldparida

    Bullet trajectory: Aiming a gun

    @haruspex, here it is:
  10. donaldparida

    Bullet trajectory: Aiming a gun

    @haruspex, Here is the diagram i drew while solving this problem,
  11. donaldparida

    Bullet trajectory: Aiming a gun

    1. Homework Statement : A person aims a gun at a bird from a point at a horizontal distance of 100m. If the gun can impart a speed of 500m/s to the bullet , then above what height of the bird he should aim his gun to hit it ? 2. Homework Equations : H_{max}=\frac{u^2\sin^2\theta}{2g}...
  12. donaldparida

    Find the angle between this vector and the coordinate axes

    I am getting cos(θ)=3/[sqrt{5(5+5t^2−8t)}]. I am not posting my attempt because it is very lengthy and on top of that i do not know how to type them properly.
  13. donaldparida

    Find the angle between this vector and the coordinate axes

    I cannot understand how to proceed. Could you please help.
  14. donaldparida

    Find the angle between this vector and the coordinate axes

    Not working. I am getting some weird expression.
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