A BUNCH OF MOLECULES TRANSPORTS US

ADVT: TODAY'S DEALS IN AMAZON

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.
----------------------------------------

Comments

LISSAJOUS FIGURES

Definition: "When a particle is subjected to two sine wave motion or two oscillatory motion at right angles, the particle describes lissajous figures". We know sine wave motion and circular motion is basically same. Hence we draw two circles A and B perpendicular to each other. The circle B rotates twice faster than circle A. That is, frequency of circle B is two times than that of A. A particle at the intersection of two circles is subjected to two sine wave motion A and B at 90 degree simultaneously. The particle will describe figures depending on the frequency and phase of A and B . In our case, the ratio of frequency is 1:2 and the two waves are in phase. To draw lissajous figures : A moving point in both the circles are chosen. Here we should remember; during the time taken by the circle A to complete one rotation, circle B completes two. Hence the points are marked on the circles according to their speed. Then straight lines

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

CASINO'S GAME

Let us find out how the casino survives with mathematics. Say, your friend invite you for a game of dice. You must bet (wager) 2 dollars. If you roll 'six' you will get back 8 dollars. The game will go on for 30 rounds. All sounds good. The probability of rolling 'six' is 1/6. Since the game will be played for 30 times, the 'expected win' is 30*1/6 = 5. That is, you are expected to win 5 rounds out of 30. Hence your gain will be 5 * 8 =40 dollars. ok. This also implies that you will loose 25 rounds. Hence your loss will be 25*2 =50 dollars. Your net gain will be gain-less = 40-50 = -10 dollars. For 30 rounds, the loss is -10 dollars, Hence, for one round =-10/30 = -1/3 dollars. There will be a loss of -1/3 or 0.33 dollars per round. It is not a fair game. Let us make a simple formula to calculate 'Pay out per round\. The probability for a win = p The pay-out in case of win = V No. of rounds = n The expect

sciencecapsules

Search This Blog