Answers edited by Giuseppe Longo Ragusa

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• Why in beta decay there is an increase and decrease in atimic number by release of electron or positron What causes the change?
  
• The relationship between waves and matter ?
  
• What are some examples of momentum?
  
• Question #c7cf5
  
• Question #917c9
  
• How electron and energy related together?
  
• Why is angular momentum a cross product?
  
• What is quantum theory?
  
• Could you explain why two springs in parallel have a smaller extension than a single spring?
  
• What are three conditions required by the sun to produce enormous energy?
  
• Is internal energy the same thing as kinetic energy?
  
• Why do dry surface have high friction than wet surface?
  
• Why is energy conversion important?