Recent content by CharS

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    State what is meant by the compressive strength of a material

    [b]1. State what is meant by the compressive strength of a material [b]3. The answer given in the mark scheme says - (compressive) stress/F/A/pressure AND to break/yield/shatter does anyone know what the answer to this question is? i don't really understand! thanks.
  2. C

    Number of electrons leaving crystal surface. any help ?

    so the answer is 1,872,000 i'm still struggling to understand how this works. thankyou for your help
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    Number of electrons leaving crystal surface. any help ?

    oh wait. i think it's 0.30 x 10^-12/ 6.24150948×10^18 before was wrong. is that the correct calculation?x
  4. C

    Number of electrons leaving crystal surface. any help ?

    thank you for your help :) I looked it up before with little success! so would the answer be = (0.30 x 10^-12) x (6.241 509 629 152 65 × 10^18) ?? i must look incredibly stupid! just never been taught this before, finding it really hard to learn myself x
  5. C

    Number of electrons leaving crystal surface. any help ?

    number of electrons leaving crystal surface. any help :)? [b]1. A scanning tunnelling electron microscope (STM) measures a tiny electrical current tunnelling out of the surface of a crystal. The current is 0.30 pA (0.30 x 10-12 A). Calculate the number of electrons per second leaving the...