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Air Pressure – Egg in a Bottle

Naman — Fri, 22 Apr 2022 06:43:00 +0000

Air is a matter of substance, and hence it contains weight and other assets like density and pressure.

Generally, the air surrounding us or objects does not show any pressure because it surrounds with equal pressure.

In this science activity, we will observe that air shows its pressure when the opportunity is given.Egg moving into the bottle without touching by external sources proves that air pressure is acting upon it. Let us discuss it in detail.Before the experiment begins, the pressure of the air surrounding and inside the jar is the same as it is equally distributed.That means the pressure inside and outside the glass bottle is the same at the beginning of the experiment.But when we placed the burning paper into the glass bottle, the air inside the jar starts to expand. Because air molecules expand when it gets warmed up, and this is the specific characteristic of air.And as soon as the egg is placed upon the opening of the glass bottle, the fire goes off, and the air molecules begin to cool down.As the air molecules cool down, they start contracting themselves by lowering the air pressure inside the glass bottle.That means there is a difference in the air pressure existing inside and outside the glass bottle.Because there is less air pressure inside the bottle. The egg slowly squeezes into the bottle as the outside pressure pushes it from outside.Yes, when the air molecules inside the bottle cool down, it offers more space to welcome additional air molecules.In this process, the outside air molecules rush into the bottle to fill the spaces. So, it keeps pressure on the egg and helps it slip down into the bottle.

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Contraction and Expansion of Air by Experihub Student

Naman — Fri, 22 Apr 2022 06:24:05 +0000

Air is a mixture of many gases. The molecules of gases present in air have weak inter-molecular forces of attraction. Due to this reason these molecules lie far apart from each other i.e. there are large vacant spaces present between these molecules. So, these molecules are free to move in any direction.

When we heat air, the kinetic energy of these molecules increase and they begin to move farther apart from each other. In this way volume of air increases and we say that air has expanded. On the other hand, when air is cooled down, the kinetic energy of its molecules decreases.

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Make a Dancing Steam Engine out of a empty Coke can!

Naman — Fri, 22 Apr 2022 06:13:15 +0000

A steam engine is a heat engine that performs mechanical work using steam as its working fluid. The steam engine uses the force produced by steam pressure to push a piston back and forth inside a cylinder. This pushing force can be transformed, by a connecting rod and crank, into rotational force for work. The term “steam engine” is generally applied only to reciprocating engines as just described, not to the steam turbine. Steam engines are external combustion engines, where the working fluid is separated from the combustion products. The ideal thermodynamic cycle used to analyze this process is called the Rankine cycle. In general usage, the term steam engine can refer to either complete steam plants (including boilers etc.), such as railway steam locomotives and portable engines, or may refer to the piston or turbine machinery alone, as in the beam engine and stationary steam engine.

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