COTTON CANDY AND WATER PUMP

Is there any connection between your house water pump and the cotton candy you eat at the carnival? yes, there is.

The centripetal force is always responsible for the rotations of a body. This force acts from the body to the center always. To every force, there is a reaction force. Here,it is known as centrifugal force which acts from the center towards the circling body radially.

Cotton candy machine:
A sugar reserve with added flavor and color is placed at the center of the rotating bowl. The sugar reserve is surrounded by an extruder- a metal cylinder with holes along its sides.
The sugar is heated and melted by an electric filament. The sugar liquid is thrown out radially through the holes in the extruder because of Centrifugal force. The thrown liquid solidifies as fibers in the rotating bowl. Then the sugar strands are collected by the stick. Your cotton candy is ready.

Centrifugal water pump:

In the water pump, a device called impeller is rotated by an electric motor. It has eye (a hole) at the center. The eye is connected to the upward going pipe. The impeller also has radial path carved on it.

First, we have to surround the impeller by the water- priming. When the impeller rotates, the water is thrown radially outwards from the eye because of centrifugal force. A vacuum or negative pressure is created at the eye. Hence water is sucked through the eye and moves upwards through the pipe. Centrifugal pump is the most preferred pump world wide.
There are many devices working on the principle of centrifugal force. It is just two of them.

--------------------------------------

Comments

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 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. ...

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 ...

sciencecapsules

Search This Blog