What causes perfume particles to move from an area of many perfume particles, to your nose where there is fewer perfume particles? Please ans me this question

Diffusion

Explanation:

Diffusion is a phenomenon whereby particles move from an area of higher concentration to an area of lower concentration.

Now, when the chemical substances of the perfume are sprayed in a room, their particles will now mix with the particles of the surrounding air.

Furthermore, the particles of the perfume which is like gas will be free to move in a very fast manner in all directions. Thus, they will eventually spread throughout the whole area where you are and thus move from the area where it is sprayed which is the area of higher concentration to the area where you are which includes your nose which is the area of lower concentration.

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.