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  1. C

    diffraction grating

    How do you work out diffraction grating? Here is my question... A women uses a diffraction grating with 400 ines per millimetre. For the green spectral line, her graph of sin θn against n is a straight line going through the origin with a gradient of 0.222. Find a value for the wavelength of...
  2. C

    graviyt/maths question

    Hi guys, I have another question, this one is really hard!!! A woman throws a cricket ball vertically upwards into the air. The ball leaves the woman’s hand 1.8 m above the ground, with a speed of 9.7 m s−1. It rises and then falls back to the ground. By considering the energies involved...
  3. C

    Rearrange Equation

    Hi everyone, Im new and im crap at this, can anyone help and explain? Rearrange Equation L = 4πCX d^2 to make d the subject Show all workings??? Thanks xx
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