Why Scientists Discoveries Always Start with Questions

Questioning is the starting point for innovation. All scientific discoveries begin with doubts, and Copernicus's doubts about the center of the earth prompted him to establish the theory of the center of the sun. Newton argued:

Light is made up of particles moving in a straight line, the so-called "microparticles" of light. Perhaps it was because of Newton's great authority that optics did not develop for a whole century in the 18th century. In 1801, a brave British physicist, Thomas Young, stood up and said:

As much as I admire Newton's name, I don't have to think that he was infallible. I regret to see that he can be mistaken, and that his authority has sometimes even hindered the progress of science. It is precisely because Thomas Young broke down superstitions, was not intimidated by Newton's authority, boldly questioned and dared to innovate, so he made an important contribution to the establishment of the "wave theory" of light.

This sentence is quite profound, and it will inevitably be solved in in-depth research, and it can be bold and suspicious. His first step to the peak of mathematics began here: "You cannot see the truth without doubt", and it is precisely because of his ready-made formulas in books that he begins to gain true insight and scientific explanation.

The reason why mathematician Hua Luogeng has been able to achieve one after another excellent results, theorems and conclusions in the field of mathematics is that bold doubts and scientific explanations are often linked, and the solution of problems and problems are raised in doubts. As a rule.

Scientist Li Siguang famously said.

CaCO3 + 2HCl = CaCl2 + H2O + CO2MGC3 + 2HCl = MGCL2 + H2O + CO2 The limit is considered to be jujube, 9 grams are all calcium carbonate or full imitation answer is magnesium carbonate.

9 84*44 = is the molecular weight of calcium carbonate, 84 is the molecular weight of magnesium carbonate, and 44 is the molecular weight of carbon dioxide).

So the mass of the resulting carbon dioxide is greater than less.

You don't seem to have the whole problem! This is not a definite number, it can only be a range, because you do not provide the ratio of calcium carbonate to magnesium carbonate.

Sunlight passes through the atmosphere to the ground, and in this process, part of the sunlight is reflected or refracted by the atmosphere.

The blue color of the sky is due to the refraction of clouds and large particles of dust in the atmosphere, because these components are more likely to refract the blue light in visible light, so the sky is blue. [I found the information from a geography book in my first year of high school].

10m/(3s-2s)=10m/s

36km h

This is not a slow or middle school candidate, this disturbance is a replica of Bor Hall!