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Is Entropy Always Positive

According to the second law of thermodynamics, the entropy of an isolated system is always increasing or constant. Entropy is a positive quantity.... View Article

Is The Sun Nuclear Fission

The energy in the Sun is not because of fission. It is generated in the Sun by nuclear fusion reaction of hydrogen nuclei into helium. The fusion... View Article

Is Gravity A Real Force

According to Newton’s law of universal gravitation, gravity is a force of attraction between any two objects in the universe. It is directly... View Article