Scientific Theories are, whether we launch spacecraft or discover an Earth-like exoplanet. We rely on physical laws and approaches to help us.
Scientists have many ways to explain how the universe and nature work and often come up with laws and theories first.
Well, how can scientific laws express the universe and nature? First, scientific laws describing nature can remain shortened in a mathematical term, such as the E=Mc² Act.
both theories and laws depend on the elements of scientific construction:
Create the hypothesis, test it, find (or not see) a practical guide, and finally include conclusions.
In the end, other scientists should be able to replicate the results if the experiment becomes the basis for a theory or law.
The big bang theory – Scientific Theories
If you’re in the process of presenting a single scientific theory, you should have an idea explaining how the universe has evolved to its present state. Thanks to the efforts of Edwin Hubble, Georges limiter, Albert Einstein and others, we have the big bang theory. Which recognizes a significant explosion at the beginning of the universe 14 billion years ago
This theory remained widely accepted in the scientific community, precisely after discovering the cosmic background, which remained found by Arnaud Penzias and Robert Wilson in 1965. the two worlds could identify the remnants of the explosion, which did not disappear over time. In collaboration with Princeton University researcher Robert dick, Penzias and Wilson confirmed dick’s hypothesis that low-level radiation scattered throughout the universe remained caused by the big bang.
The law of gravity – Scientific Theories
How can scientific laws express the universe and nature? First, you should know ten scientific theories and regulations that explain how the universe and nature work.
Thanks to newton’s gravity law, we can see the gravitational force between any two bodies.
It may be sure to us now, but 300 years ago, scientist Isaac Newton proposed a revolutionary idea that each body, whatever it’s mass. Would be attracted to each other. This idea was the famous gravitational equation taught by many high school physics students; F=G×[m1m2/r2] refers to the strength of attraction between the two bodies measured by Newton and M1. The M2 means the masses of the two bodies. The r represents the distance between them and the gravitational constant G, estimated at 6.672 × 10^-11 N.M^2.kg^-2.
The great benefit of knowing the laws of gravity is that we can calculate the force of the clouds between any two objects. This capability is beneficial when scientists plan to launch satellites into earth’s orbit. Or set a spacecraft path toward or around the moon.
Newton’s laws of movement
Newton’s second law of motion.
Recalling one of the most outstanding scientists who set foot on earth, let’s move on to one of newton’s most important laws, his three laws of motion that form one of the basics of modern physics. Like many physical laws, they are simple and exquisite.
The first of these three laws states that the moving body remains mobile unless an external force influences it. For example: if we roll a ball to the ground, the ball’s contact with the ground represents an external force that affects the ball’s movement.
The second law is the relationship between the mass and acceleration of objects, expressed in the equation: F=m×a, where F means force and remains measured in Newton, which is also oriented and means that it has a directional vehicle. That is because the acceleration of the ball rolling on the ground has a specific direction in which it moves, calculated based on its strength.
The third law states that each reaction has an equal reaction in the amount and is contrary to it in the direction; that is, that body remains pushed with equal force for every force that applies to a particular object or surface.
British novelist and physicist snow about Scientific Theories
people who don’t know the second law of thermodynamics are like a world that has never read Shakespeare. Snow’s famous phrase remained intended to emphasize the importance of thermodynamics. And the need to be known by the public.
In its simplified definition, thermodynamics is a study of how energy can work in a system, whether it’s an engine or a core of the earth. It can remain summarized for the number of fundamental laws outlined by snow:
Well, let’s solve that puzzle. Snow says, “you can’t win” it means that since energy and material remain preserved in a particular system, you can’t win one without giving up the other;
The second phrase, “you can’t tie”, indicates that because of the increase in the so-called “Entropia”, you cannot go back to the state of energy itself, as the concentration of power in one home remains permanently reduced by spreading to other places with lower energy concentrations.
Finally, the third phrase, “you can’t finish the game”, refers to absolute zero, the lowest thermal energy theoretically possible. Representing zero on the kelvin scale (negative 273.15 degrees celosia andSalb 459.67 degrees Fahrenheit). When the system reaches absolute zero temperature, the movement of all molecules stops, i.e. it will not find kinetic energy. As Entropia comes to the lowest possible value. But in the physical world, reaching absolute zero temperature even in space is impossible, as you can only approach it.