you may have learned about the three states of matter, solid, liquid, and a gas.
in a previous lesson, did you know that there is a fourth state of matter plasma
in this lesson we will learn about plasma let's start by thinking about ice
when ice is sufficiently heated it melts to form water it has therefore undergone
a change of state from a solid to a liquid
and assaulted all of the particles are closely packed in a fixed position and
therefore has a fixed shape and volume the particles in a liquid are still
touching one another and are able to move around each other therefore a
liquid still has a fixed volume but it takes the shape of their container what
is the change of state that occurs when water is heated to a hundred degrees
Celsius pause think and continue and ready
the answer is water evaporates from the liquid to a gas
in our case water vapor the particles in a gas are further away from one another
and take the shape and volume of their container for certain substances if we
continue to apply heat to their gaseous form another change of state could occur
these substances can go from a gas to a state of matter called plasma for this
change of state to occur a very strong heat must be applied when heat is
sufficiently strong the electrons are stripped from their respective atoms
creating free electrons and positive ions although there are both negative
and positive particles plasma is neutral overall as there are equal amounts of
oppositely charged particles since free electrons are present
substances in plasma form can conduct electricity this is what separates a gas
from plasma all gases cannot conduct electricity but plasma can
naturally-occurring plasma include lightning and the Northern Lights if we
were to go far beyond planet Earth stars also exist in plasma form in fact stars
are really just hot balls of plasma plasma can be found in fluorescent
lightbulbs and neon signs when an electrical current is passed through the
mercury vapour in fluorescent lightbulbs it heats up the gases sufficiently to
strip the electrons and to create plasma plasma screen TVs are made possible due
to the state of matter a plasma screen is made of many thousands of tiny dots
called pixels which are made of three fluorescent light electrodes emitting
the colors red green and blue the combination of these colors can give any
possible color which is why we can see all colors on these
the higher the number of pixels the higher the definition and the images
will appear sharper and more detailed
For more infomation >> 1 DAKİKADA SEX EDUCATION - Duration: 1:01. 
Không có nhận xét nào:
Đăng nhận xét