Newton’s first law of force is: If no external force acts, a stationary object will remain at rest, and a moving object will continue to move in a straight path with uniform velocity.

That is, if no force is applied from outside, there will be no change in the kinetic state of the object. Here it is called external force because the force must be applied from outside. Not from within the object. That is, if you sit inside a bus and apply force on the bus itself, it will not. Rather, the bus should be pushed from outside.

In practical terms, Newton’s first law gives an idea of the nature of force. That is, force must be applied to change the motion of an object. So we can define the ball from here.

Also, this formula gives the idea of inertia. If no force acts, the object will remain as it is, from this idea we can also define inertia.

Everything has both good and bad sides. Science also has. While making our daily life much easier, there is no way to neglect the cursed aspects of science. Where science is saving our daily time, science is making us dependent again. We now depend on technology in every aspect of life. From small children to adults, everyone is now a smartphone lover. No one thinks how much this smartphone hinders the intellectual development of the child.

This smartphone causes a lot of mental and physical damage to the child. When there was not so much technology, children used to play outside the house. At that time, children developed friendly behavior, and a mentality of getting along with each other, which is not commonly seen today.

Science explains the everyday events that happen around us or in nature and the reasons behind those events. So simply the definition of science will be – science is a branch of knowledge that explains all the phenomena of the physical world and the causes of those phenomena. Along with that, whatever is observable, testable, and verifiable in the physical world, its orderly, systematic research, and the knowledge gained from that research is called science.

Let me explain the behavior of inductors in electrical circuits using a very simple example.
I think there were two clubs named Tommy Club and Mummy Club. The distance between them is 100 kilometers. The road from the Tommy Club to the Mummy Club is much better. There are 1000 people in Tommy Club who all leave for Mummy Club at 5 pm and everyone i.e. the last person to leave arrives at Mummy Club at 7 pm. People move between these two clubs from 5 pm to 7 pm.

Now if there is a broken bridge between Tommy’s and Mummy’s club, can people leave Tommy’s club at 5 pm and reach Mummy’s club by 7 pm? Certainly not Because of that broken bridge they will arrive later. Although 1,000 people had left Tommy’s Club by 5 pm, the streets between the two clubs were still crowded after 7 pm. Because the broken bridge will delay people. As a result, people will spend more time on the road.

The behavior of this bridge in an electrical circuit is called an inductor which acts as a bridge in the circuit.
The inductor is basically a stranded wire. When current passes through this twisted wire, a magnetic field is created in it. Which in turn blocks the current flowing through the wire. And due to this blocking current flows in the circuit for more time than before. It appears that the inductor is supplying this current. Just like the case of the broken bridge.

So if you want to have current in the circuit for some time after the switch is closed, you can add an inductor to the circuit. But in that case, you have to remember that the current you are sending should be AC. Because DC will not create a magnetic field in the inductor. As a result, our whole process will not happen

If some molecules of gas are released into a closed container, surely the molecules will move around inside that container. Molecules can run along the length, width, or height of the container. That is, the molecule can move along three dimensions. The number of degrees along which molecules of an ideal gas can move is called its degrees of freedom.

Since the molecules of an atomic gas such as helium, neon, argon, etc. have only one molecule, we can think of them as a ball. These balls can move freely along three dimensions. So we say, an atomic gas has three degrees of freedom.

Now diatomic gases such as nitrogen, oxygen, etc. are joined by two atoms in one molecule. As we can imagine, two balls are connected by a rod. Since two atoms are connected here, we can think that their degrees of freedom will be three and six in total. But it is not. Due to being connected through bonds, a degree will be reduced between them both. That’s why two atoms individually two by two give a total of four and a common one together will give them a total of five dimensions. So the degrees of freedom of a diatomic gas will be five.

Similarly, triatomic gases will have seven degrees of freedom instead of nine. The energy along one degree of freedom of any molecule or atom is 1/2.KT. then,

The total energy of one atomic gas molecule = 3.1/2.KT
The total energy of molecules of diatomic gas = 5.1/2.KT
The total energy of molecules of tri-atomic gas = 7.1/2.KT

Thus the total energy of gas molecules is distributed equally along their degrees of freedom. It is called the principle of power-sharing.