What is the difference between gravitational force and electrostatic force?
Gravitational force can only be attractive but electrostatic force can be attractive as well as repulsive.
ELECTROMAGNETIC DYNAMICS PRESENTED BY GUO CHENG GUANG(aged 11) AND GUO CHENGXI(aged 8) IN ENGLISH(1-05，S/N: 05).
Lessons In Mathematics and Science (Physics, Chemistry and Biology) From Primary to University Presented By Guo Cheng Guang and Guo Chengxi In English. Your comment or suggestion is very much appreciated. https://www.youtube.com/channel/UC2dG5T9SJkUFTy-h0KbVbkw
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