Answers edited by Saif Rabbani

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• Two charges of `-1 C` and `2 C` are positioned on a line at points `-2` and `2`, respectively. What is the net force on a charge of `2 C` at `1`?
  
• Question #d961f
  
• A ball with a mass of `12 kg` moving at `7 m/s` hits a still ball with a mass of `17 kg`. If the first ball stops moving, how fast is the second ball moving? How much kinetic energy was lost as heat in the collision?
  
• What is the molecular structure of `"nitrous oxide"`, `N_2O`?
  
• Why do cells break down sugars?
  
• How do you determine ionic size?