Answers created by Vartika

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• Focal length of convex lens is 3cm. Find the image distance if object of height 2cm is placed at 7cm from lens?
  
• Question #25a8e
  
• True or false? the gravitational force between two particles depends upon the medium between the two particles. Thanks
  
• Question #1eeb9
  
• Why charge is usually transferred by electrons rather than by protons?