Why is Brownian motion important to the study of Physics and what are at least 2 examples of Brownian motion in real life situations and the importance of them?

Answer 1

Molecules in a fluid move constantly, freely, randomly, in all directions and with all possible velocities. This erratic motion of the molecules causes them to collide with anything in their path. when pollen grains are suspended in a gas, they fill a resultant force i particular direction and moves to another position, where it has to face same force again. For example, dust particles will be bombarded by the molecules moving at high speeds, causing them to have a zig-zag motion.

Brownian motion also takes place in molecules in a liquid, but to a less obvious extent than in a gas.

Answer 2

Brownian motion is defined as the continuous and random motion of the particles suspended in a liquid or in a gas. It is caused by the collision of these particles with each other and with the molecules of the surrounding medium due to their random movement with varying velocities. It was discovered by Robert Brown in the year 1927. He observed that pollen grains when placed in water are not at rest but move continuously in a zigzag manner. He termed this motion as Brownian motion.

Answer 3

Brownian motion explains, for example, how a liquid's particles move about in a quick trajectory even if it appears to be calm. A great example I found, was imagine quick moving Golf balls zooming around a pool table filled with ball bearings. Because of the mass of ball bearings, you don't technically notice the golf balls hidden within, even though they are zooming around. In a solid, the particles vibrate against each other quickly when full of energy. In a liquid, they move around in their container bumping around against each other. In a gas, they speed all over the place until they hit another one. So, back to my point, another example of Brownian motion is, have you ever wondered why if the water is cold, it isn't frozen, because if its cold doesn't that mean there is no energy, so it should be solid? Heat is formed when two particles or more collide. Energy just makes them move. In science classes, the teachers unfortunately usually make it sound like heat is solely the cause of a change in the state of matter. That is not true. If energy could be directly pumped into a particle, it would still move even if no heat was involved. If a particle could somehow move around and never hit another one, no heat would ever be formed. But you need energy in the first place for them to move. Heat is just the easiest way of making energy. It's pretty confusing, I know, and it probably ends up sounding just like the way teachers do it. As a quick revision, if a liquid is cold, that does NOT mean it is a solid. Think of this, a room floor with two dozen golf balls zooming around but they never hit each other often enough for noticeable heat to be formed. If water is luke warm, they are hitting kind of often, if it's freezing, they probably only hit each other once in a while, if it is boiling, they probably just can't stop colliding. Brownian motion explains all of this.

Answer 4

1-application in medical imaging.

2-in robotics

3-in estimation of extreme drought and flood conditions.

4-in market analysis.

5-manufacturing process.

6-decision making in economic activities.

7-transportation of aerosol particles.

Answer 5

The discreteness of the liquid molecules is responsible to the Brownian's motion.

Answer 6

Random motions of atoms and molecules