Hi there, friends in this session, we will be introduced to A Whole New World,
a world of physics in this beautiful planet that we call Earth. There are a lot of interesting
events that take place. These events are around us, which we see, or do or experience almost
regularly at some point in time. Your curiosity would have definitely got the better of you,
and would have pushed you to ask questions like what's going on. How does that happen? Well,
leaving Miracles apart. The answer to all these questions is physics. You see, there is more to
events in our everyday lives than what meets the eye. So to appreciate the events that you see,
you have to first understand events that you don't see confused. Don't worry. Let's make it simple by
looking into 10 of our everyday life examples at random. We all know what that sound is,
don't we? It is a very annoying, yet important sound, which tells us that we have to be up and
about. We wake up in the morning at the sound of the alarm sound is something which we can't see,
but can hear our experience. It is used in important medical equipment like the ultrasound
scanner, and buy ships to estimate the depth of the ocean physics studies, the origin, propagation
and properties of sound. Let's make a note of this event of sound and other events yet to come in the
session before we Define what physics has in the end, to have a cup of coffee, we boil water. After
turning on the stove, we noticed that the water is hot enough when it starts boiling. And when we see
Steam this gradual rise in temperature that causes the water to bubble and later changed to steam is
called heat. Thus, we get hot water by heating that is, increasing. The temperature of water.
Heat is used in the industry to melt metal and make various types of heavy-duty Machinery like
Automobiles and generators. It is also used in household appliances, like the electric or steam
iron heat. And its properties is an important topic of physics as well. While we take a walk
in the park on at our road, we have a good grip without slipping because of a sort of roughness
or resistance between the soles of our shoes and the surface of the road. This resistance
that's responsible for grip is called friction or traction. But say, if we're busy on our cell
phones or waving at our friends, and we do not notice a banana peel in front of us, what makes
us fall 12. Apart from our absent-mindedness, it is due to the reduced friction between our
shoes and the road because of the slippery banana. Peel friction, which is an important
factor in the making of tires, is also explained by physics. We have all observed apples falling
from a tree or balloons floating away in are how is this possible? The apples fall down while the
balloons float up. This is nothing to be puzzled about. The answer is simple. Earth has a kind of a
pull that draws every object to its surface. This bull is called gravity or gravitational force,
which keeps every object grounded to the surface of the Earth and prevents them from floating away.
This is why Apple's fall to the ground and why people or objects on the underside of the earth
do not fall into space. So why did the balloon float away and not fall to the ground? Hmm again,
it's no big deal. We know the air is light. So imagine something which is lighter than air like,
say, helium gas filled into the balloon because it is light. It rises to a level higher than air,
and thus Works Against Gravity, which now cannot keep the balloon grounded. Gravity is study to a
great extent by astronauts to mimic conditions in outer space. In fact, gravity is the very event
that was studied by Sir Isaac Newton, who is now considered one of the fathers of physics. When
we use a compass, we notice that the direction of the needle is constant. That is the needle points
in Only One Direction. Not this is because of a force of attraction between two oppositely charged
ends called magnetism. All materials that follow magnetism can be termed as magnets. Did you know
that apart from being just a planet, our Earth is actually one big giant magnet. The geographic
North Pole of the earth that is the Arctic region is actually the magnetic South Pole,
which attracts the Magnetic North Pole of the compass is why the compass always points North,
no matter where it is. We all know Opposites Attract, don't we? Physics looks into the property
of magnetism, which is used in modes of Transport, like the Metro trains and in parts of electronic
speakers.We would have all seen or done at least a few of these tricks. So what makes objects
remain still or maintain its position? Even if there is a pull or tug on it, it is the inertia
or unwillingness or laziness of a body to change its state of rest or motion. This means if a body
moves, it prefers to remain in motion and finds it difficult to stop unless an outside force acts on
it. Similarly, when a body is not moving or at rest, it prefers to stay that way and finds it
difficult to start moving unless an outside force acts on it. This property of inertia is important
for the automobile industry while mimicking accidents for safer cars to be manufactured. Thus,
physics also involves inertia. Speaking of Doug's or pushes, what do we do when we open or close the
door? We use Force when the door is heavy, we use more strength to move it, which simply means that
we use more force force is something that we use on a daily basis. In almost all tasks, we
undertake like brushing our teeth. Pushing buttons on a keyboard or cell phone force is also involved
in various processes like coughing, sneezing and blood flow due to the contraction of certain
muscles in our body. Simply put, force is nothing but the pressure exerted by one body on another
body sports like swimming or running also employ Force for this reason, force is also dealt with by
physics. Let's look into our daily gadgets like the cell phone. What makes the cell phone work
is the electricity that supplied by the battery. What charges the battery is, the electricity that
supplied by the power source, electricity, as we all know, is an important part of our daily
lives. Beat for transportation like buses, cars or trains of a powering, a household appliances
like the television, the fridge, the microwave, or even to watch this video. Did you know that
our body is also like an appliance and the part of run it comes from certain cells which produce
electricity. This type of electricity is called as bioelectricity, which we will see in our biology
videos, though we all are biological systems. The mechanism of electricity production is explained
by physics. Remember, if electricity can rock your world, it can also shock Your World. The Many
usages of electricity is enough proof to justify why we include electricity in physics. After a
while of rain, we see a rainbow in the sky. It is beautiful and has seven different colors. This is
a property of light, particularly white light. Do we call it white light? It is actually a mixture
of Lights of many different colors. Rainbows are formed due to the splitting of sun rays,
which is white light through raindrops. Study of light is an important part of physics because of
the various usages of light, like in decorations and lasers. Did you know that we are all made
up of many, many smaller particles which we cannot see individually with our Naked Eyes,
or even with a microscope. They are even smaller than the smallest cell. And in fact, these are
the very building blocks of cells and everything in the universe. Do you know what these particles
are? They called atoms. Two or more atoms come together to form a molecule. And many molecules
come together to form visible matter. Just imagine how many molecules, and consequently, how many
more atoms we are made up of billions, trillions, zillions, even things that we can't see,
like my new dust particles, are made up of atoms. The theory of atoms and molecules is involved with
the original of the universe, life on Earth and everything around us. Hence, physics just cannot
do without it from all of these events. Let us now Define physics. The word physics comes from the
Greek word fizzes, meaning nature and physique meaning, knowledge of nature. Thus simply put,
physics is nothing but the study of nature and the Universe on the whole, and the various occurrences
or events taking place in it. For each of the previously mentioned examples. There are other
events that are occurring at the same time, which are invisible, or which we considered physics,
explains all these unseen events to its goal is to answer all questions, right from Elemental
particles like atoms to gigantic structures like planets. It gives us an understanding of how and
why things are the way they are. The events mentioned earlier were just minut examples of
how physics is involved in our everyday lives. So now, do you see how important studying physics is?
Physics is a lot like a mountain, which is not difficult to scale. And when you reach the top,
the view is beautiful. Just don't accept things the way they are. Follow your curiosity wide
and far. Please give us your comments on the session. If you like the session and uninterested
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