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  1. M

    Oxidation Reduction

    Anyone help me with this question please ? :) Write balanced ionic equations for the following: a) zinc is placed in a copper sulfate solution. b) lead is added to a solution containing Ag+ ions. c) iron is placed in a solution containing Na+ and Pb2+ ions.
  2. M

    Square Ammeter Coil

    An square ammeter coil has 80 turns of wire each of area 16.0cm^2. It is pivoted in a radial magnetic field of intensity 0.25T. a) Calculate the magnitude of toque acting on the coil when 60mA flows through it. My Working: Torque = nBIACosθ = 80 x 0.25 x 0.06 x (0.16)^2 = 0.03072...
  3. M

    Torque on a Coil

    A square coil of PQRS with sides 0.05m and 250 coils carries 1.6A and lies in a 0.4T magenetic field directed from left to right. The plane of the coil is parallel to the field with PQ perpendicular to the field. a) Calculate the magnitude of the force on side PQ. b) Calculate the magnitude...
  4. M

    Polymer Structures

    Could someone help me with these, any help would be greatly appreciated. :)
  5. M

    Condensation Polymers

    When two glucose units join together they form sucrose, commonly referred to as table sugar, which is a ___________. Polyamides can be formed from either one or two different monons but these monomers must have the functional groups: __________ and amine at the end. Proteins such as wool...
  7. M

    Torque (Magnitude of Force)

    A 5.0cm square coil with 150turns of wire is in a magnetic field of intensity 0.25T. The plane of the coil makes an angle of 30 degrees with the magnetic field. The coil carries a current of 3.0 A. a) Calculate the magnitude of the force acting on each side of the coil. I've done the...
  8. M

    Differentiation

    Differentiate x√x Thanks. :)
  9. M

    Projectile motions :(

    1.A projectile has a time of flight of 7.5 s and a range of 1200m. Calculate: a) its horizontal velocity Δx = u(x) x t 1200=7.5u u(x) = 160m/s b) its maximum height c) the velocity with which it is projected 2. A cannon ball is fired at 80ms-1 at an angle of 45 degrees to the...
  10. M

    Projectile Motion Questions :)

    A projectile is fired horizontally at 150ms-1 from the top of a 196 m high cliff. Calculate: a) its time of flight b) its range c) its velocity on hitting the ground Thanks for any help guys ! :) Really appreciated.
  11. M

    Emma-Jane Austen

    Any one happen to be studying 'Emma' by Jane Austen by any chance ?
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