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    Relative Velocity

    thanks for the help i resolved the question today what a relief
  2. P

    Relative Velocity

    i really need some clarification on this question it is doing my head in why i can't work it out, there is something that i am not taking into consideration but i don't know what it is please some help is required!!!!!!
  3. P

    Relative Velocity

    That is what i had done cross multiplied to get that equation? Is the denominator then added to get 2x^2-7.9202 i'm oblivious of where to go from hear very lost atm?
  4. P

    Relative Velocity

    ok, Current = 1.99 m/s Total time = 192 s Total distance travelled = (2x153) = 306 m I've used the total time taken taken (192s) to be equal to the formula for the time taken upstream and downstream which looked like this. 192 = (153/ (x + (-1.99)) + (153/(x + 1.99) rearranging and...
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    Relative Velocity

    A swimmer is training in a river. The current flows at 1.99 metres per second and the swimmer swims upstream a distance of 153 metres before swimming back to the starting point. If the total time for the swim is 192.0 seconds, what is the swimmer's speed relative to the water? I've been stuck...
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    Need help Point Charges

    Points A,B and C are at the corners of an equilateral triangle of side 3 metres. equal positive charges of 2 micro-Coulombs are at A and B respectively. What is the potential at C??
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    Diffraction need help bad

    could you explain it a little more for me please im still not grasping it 100%.
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    Diffraction need help bad

    Diffraction......need help bad Suppose that a single slit diffraction pattern is displayed on a screen. The distance between the first minimum on the left of the screen and the first minimum on the right is 5.4mm. The screen is 0.9m from the slit and the wavlength of light is 546nm. Calculate...
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