A BUNCH OF MOLECULES TRANSPORTS US

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Can you believe that a handful of gas molecules carry and transports us? yes, that is true.

We know the air is filled at high pressure in vehicle tires. High pressure means; a very large number of molecules bang the walls of the Tyre with great force. The force given by these molecules bear our weight; the vehicles' weight and carry us.

In the engine, a set of cylinders and pistons arrangement is present. Inside the cylinder, the mixture of air (oxygen) and petrol vapor is ignited by an electrical spark. It then explodes. Explosion means Sudden expansion of gases; gas molecules gain energy; move faster. These molecules push the piston. A visible mechanical movement is created by invisible molecules.

These movements of pistons are converted into rotational motion which will then power and drive the wheels. The rotations of wheels transport us. Hence, just a collection of molecules is responsible for our journey.

The steam engine which propelled the trains of easter years also works on the same principle. Here vaporized water molecules powers the engine.

In the case of the rocket; liquid oxygen and liquid hydrogen (an example) burn providing very hot gases. These gas molecules escape through the nozzle at the back with great force. This force creates the reaction force which propels the rocket forwards. Hence gas molecules landed men on the moon.

Air molecules flying under the wings of the plane lifts it up. Helicopter, Drones, air balloon, glider manipulates air molecules and flies.

When we drink fruit juice using a straw, the air molecules push the liquid into the straw. Air molecules can push heavy mercury liquid into an evacuated glass tube up to 76.4 cm. That is the power of moving air molecules. That is what we call standard atmospheric pressure.

The invisible power of gas molecules is great.
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THE EARTH, A SUPER ORGANISM

JOIN MY COURSE: "Become a programmer in a day with python" A man called 'love lock' (what a name) proposed a theory called Gaia theory, named after Greek Goddess. It says, "Earth is a self-regulating organism like a human being. The organic life in it interacts with in-organic matter and maintains atmosphere, temperature and environment". Hence the earth is still suitable for the life to thrive. Imagine, in a particular place, there are lot of flowers. Some flowers are white and some are darkly coloured. We know, white reflects light and heat while dark absorbs the same. White flowers can thrive in hot climate. But dark flowers requires cold climate. The absorption and reflection balances and the environment reaches average, warm temperature at which both the flowers can co-exist. This is the essence of "Gaia" theory. On our earth, the oxygen constitute 20% of the atmosphere. The oxygen level is always mai

THE PARABOLA

A jet of water shooting from a hose pipe will follow a parabolic path. What is the so special about parabola. Y= x^2 Draw a graph for the above equation. It will result in a parabola. This parabola is also called unit parabola. Any equation involving square will yield a parabola. Example: Y = 2x^2 +3x+3 (also called quadratic equation) X= 2 and -2, both satisfies the equation 4 = X^2. Parabolic equations always have two solutions. Any motion taking place freely under gravity follows parabolic path. Examples: An object dropped from a moving train, A bomb dropped from flying plane, A ball kicked upwards. If a beam of light rays fall on the parabolic shaped mirror, they will be reflected and brought to focus on a point. This fact is made use of in Dish Antenna, Telescope mirrors, etc. Inverted parabola shape is used in the construction of buildings and bridges. Because the shape is able to bear more weight. A plane

DISORDER IS THE "ORDER OF THE DAY"

Imagine a balloon full of air. The air molecules are moving randomly inside the balloon. Let us pierce the balloon with a pin. The air rushes out. Why should not the air molecules stay inside the balloon safely and ignore the little hole? That is not the way the world works. The molecules always "want to occupy as many states as possible". Hence the air goes out in the open to occupy more volume. The things always goes into disorder (entropy) and the disorder increases with time. The above statement is what we call "second law of thermodynamics". Consider a cup of coffee on the table. Suppose the heat from entire room flows to your cup of coffee, the coffee will boil and the rest of the room will freeze. Freezing means bringing things to order and arrangement. It violates the second law. Hence it will never happen. Hence heat must flow from high temperature to low temperature and not the other way. The air molecules in y

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