Until the end of the XIX century. some scientists believed that the source of the sun’s energy was combustion reactions, in particular, the combustion of coal. Assuming that the heat of combustion of coal is q = 10 ^ 7 J / kg, the mass of the Sun is M = 2 * 10 ^ 30 kg, and the luminosity is L = 4 * 10 ^ 26 Wt, give strong evidence that this hypothesis is incorrect
Heat reserves without oxygen are Q = q⋅M = 2⋅10 ^ 37J. This reserve will be enough for the time t = Q: L = 2⋅10 ^ 37 / 4⋅1026 = 5⋅10 ^ 10c = 1700 years. Julius Caesar lived more than 2000 years ago, Dinosaurs became extinct about 60 million years ago, so that due to chemical reactions the Sun cannot shine.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.