Method for demonstration of rotating variable parabola

Abstract

The invention discloses a method for demonstration of a rotating variable parabola. A device is mainly formed by water, dyed kerosene, a water-containing flat square box, a motor, a power source, a table and a mobile phone. The method is characterized in that a plastic turntable is fixed on a rotating shaft of the motor, the water-containing flat square box is inserted in a groove of the plastic turntable and fixed, one end of a light straight rod is perpendicular to the water-containing flat square box and fixed on the plastic turntable, and the mobile phone is fixed at the other end of the light straight rod. The water-containing flat square box is a flat square box which is made of a transparent resin plate and has a top provided with a hole, one side of the water-containing flat squarebox is engraved with a grid, a certain amount of water and dyed kerosene are contained in the water-containing flat square box, and a rubber plug is inserted in a square box hole to make the water-containing flat square box sealed. During the demonstration, the water-containing flat square box and the mobile phone rotate with the motor at the same angular speed, the liquid level of the dyed kerosene in the water-containing flat square box at a corresponding rotating speed is observed, the law of a rotating liquid surface parabolic equation is explored, and the interface law of two synchronously-rotating liquids not dissolved with each other is explored. The manufacturing cost is low, the manufacturing is easy, and the effect is obvious.

Description

Technical field [0001] The patent relates to a demonstration of a rotating variable parabola, which belongs to the field of university mathematical experiment instruments. Background technique [0002] The concept of rotating parabola is often used in college physics courses and advanced mathematics courses. Especially for college students who are beginners in mechanics, it is difficult to prove that the liquid surface of the rotating liquid is a parabola. It is difficult to understand. The inventor of this patent is also Reference [1] gives a series of studies, lacking some corresponding demonstration experiments. The prior art mainly uses Newtonian bucket experiments. Due to the viscosity of the liquid, it takes a long time for the rotating liquid to reach the same angular velocity. The observation is also comparative. Difficult, and lack of experimental demonstration of the law of the interface (boundary) of the synchronously rotating two immiscible liquids. Up to now, no more...

AI Technical Summary

Problems solved by technology

[0002] The concept of a rotating parabola is often used in college physics classes and advanced mathematics classes. Especially for college students who are beginning to learn mechanics courses, it is difficult to prove that the liquid surface of a rotating liquid is a paraboloid, and it is difficult to understand. The inventor of this patent is also A series of studies are given in the literature [1], but some corresponding demonstration experiments are lacking. The existing technology mainly uses the Newton bucket experiment to study. Due to the viscosity of the liquid, it takes a long time for the rotating liquid to reach the same angular velocity, and the observation is relatively Difficult, and there is also a lack of experimental demonstration of the interface (boundary) of two immiscible liquids that rotate synchronously. Up to now, no better credible qualitative and quantitative demonstration experiments have been given for this problem. How to achieve rich demonstration content and obvious visual effects , credible demonstration experiment apparatus and method, this patent will solve this problem

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