Recent content by Alvine

  1. A

    Does Heating a Gas Under Constant Pressure or Volume Affect Its Internal Energy?

    Homework Statement I have two identical volumes of gas, and I heat them both to 100 C, one under constant pressure, one under constant volume. Which has more internal energy after the process? The attempt at a solution I believe that they both have the same as the extra heat you have...
  2. A

    Entropy change for isobaric heating

    Hi guys, is this right? Homework Statement A mole of nitrogen is heated at constant external pressure of 1 atm from 25° C to 100° C. The heat capacity of nitrogen is 29.1 J/mol·K. Calculate ΔSsurr 2. The attempt at a solution delta_S=Q/T = -1*29.1*75/373=-5.85 J/K (heat...
  3. A

    Schools To math university students / experienced mathematicians

    Cambridge won't care about your GCSEs, I got in and mine are only slightly better than yours. Just do it, you'll be upset for a week if they reject you but you'll regret it for a lot longer if you don't take the chance.
  4. A

    Using Gauss (Divergence) theorem to find charge distribution on a conductor

    Well I can do the last bit, but the other two I have no idea how to provide a mathematical reason for, all I can come up with is some hand-waving nonsense about equilibrium.
  5. A

    Using Gauss (Divergence) theorem to find charge distribution on a conductor

    Hi, I hope this is advanced enough to warrant being in this section: I'm supposed to use the Gauss theorem (and presumably his law) to show: 1)The charge on a conductor is on the surface. 2)A closed hollow conductor shields its interior from fields due to charges outside, but doesn't...