If a bottle of perfume was spilled in the corner of a large lecture hall, the students sitting near that corner of the room would very quickly smell the perfume. Over time, the students sitting in the far corner of the room would smell the perfume. What phenomenon has occurred to the perfume molecules that have entered the air?

Simple Diffusion

Explanation:

Simple diffusion is the physical process by which substances move from a region where they are highly concentrated to areas where the concentration of that substance is lower. Simple diffusion is a spontaneous process that does not require energy, but is promoted by a concentration gradient.

The substances that are dissolved are called solutes, they move through a solution (or a gas) by random movements. Random motion is defined as the motion that occurs by chance, where there is no regular order or system by which the motions of the particles change in a solution or gas.

Simple diffusion

Explanation:

Simple diffusion is basically the diffusion of substances through a membrane without needing the help from other substances, from the area of higher concentration to the area of lower concentration.Also known as passive diffusion.

Simple diffusion does not require energy. Instead, it happens by random motion. Random motion is defined as movement that occurs by chance because there is no order or regular system by which the movements of the particles shift in a solution or gas.

Therefore the smell of perfume spilled at the corner of a large hall spreads to all other corners by simple diffusion.

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most historians agree that gabriel mouton, the vicar of st. paul’s church in lyons, france, is the “founding father” of the metric system. he proposed a decimal system of measurement in 1670. mouton based it on the length of one minute of arc of a great circle of the earth (now called a nautical mile, 1852 meters). he also proposed the swing-length of a pendulum with a frequency of one beat per second as the unit of length (about 25 cm). a pendulum beating with this length would have been fairly easy to produce, thus facilitating the widespread distribution of uniform standards. over the years, his work was revised, improved, and extended by a number of french scientists.

the political sponsor of weights and measures reform in the french revolutionary national assembly was the bishop of autun, better known as talleyrand. under his auspices, the french academy appointed several committees to carry out the work of developing a usable system of weights and measures for france. one of the committees recommended a decimalized measurement system based upon a length equal to one ten-millionth of the length of a quadrant of the earth’s meridian (i.e., one ten-millionth of the distance between the equator and the north pole).