Recent content by devil0150

  1. D

    How Do You Calculate the Change in Entropy When Ice Melts in Water?

    In 250gr water at 23 oC(degrees celsius) we throw in 27gr ice at 0 oC. Find the change in entropy. (sorry if that was a bad translation but English is not my native language) The answer is 0.78 calories/oC. But I'm not sure how do this. The formula I have for entropy is: S=δQ/T I find the...
  2. D

    Equation for speed of charges (electrostatics)?

    Yes I tried using coulomb's law to find the force, and then each of the accelerations (a = F/m) but to find the speed from this (v^2 = 2*a*d) I need the individual distance traveled by each particle, and I only have the sum of both distances (0.5 m). Edit: And since the force has different...
  3. D

    Equation for speed of charges (electrostatics)?

    I am trying to do an exercise but there's no equation in the book that links speed and charges. Can anyone help? This is the exercise: Homework Statement There is a particle with mass = 20 grams and charge = 6 x 10^(-6) C, and another particle with mass = 50 grams and charge = -4 x 10^(-6) C...
Back
Top