A kind of physics teaching device

Abstract

The invention discloses a physics teaching device, which comprises a stepped base, the stepped base is provided with a water storage box, an air blowing mechanism is provided in front of the water storage box, a partition is provided in the water storage box, and the The partition board divides the water storage box into a water supply tank and an experiment tank. The physics teaching device provided by the invention has reasonable structure, simple operation, accurate measurement, good experimental effect and convenient use; by using the ingenious combination of the principle of the float valve and the connecting device, the When adding water to the water cup, it can reach the position of the overflow port of the water cup accurately, no more, no less, which realizes the convenience and accuracy of V, that is, the measurement of displacement, and facilitates the next experiment.

Description

technical field [0001] The invention relates to the technical field of experimental equipment, in particular to a physics teaching device. Background technique [0002] The expression of the law of buoyancy in physics teaching is: buoyancy means that an object immersed in a static fluid is subjected to the resultant force of forces from all directions of the fluid, and the magnitude of the buoyancy on the object is equal to the gravity of the fluid displaced by the object. This law of buoyancy was first discovered by the famous ancient Greek scholar Archimedes, so it is also called "Archimedes' law of buoyancy", also known as "Archimedes' principle". Its mathematical expression is: F=G=mg=Vρg. In the above expression: F is the buoyancy; G is the gravity of the displaced fluid; m is the mass of the displaced fluid; g is the acceleration of gravity; V is the volume of the displaced fluid; ρ is the density of the fluid. [0003] In middle school physics courses, the law of bu...

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Problems solved by technology

[0005] 1. The existing experimental device has complex structure, cumbersome operation, time-consuming and labor-intensive

[0006] 2. The existing experimental device cannot allow students to view and understand the principle of the law more intuitively, and the experimental effect is poor

[0007] 3. The measurement of V is inconvenient and inaccurate

However, adding water to the overflow by hand is not only cumbersome to operate, but also very difficult to achieve. If it is not added to the overflow of the experimental tank, the measured V will be too small, and the experimental results will be biased. If the water is added beyond the overflow of the experimental tank, it will pass through the water collection cup. The measured V is too large, resulting in the measured G row being too large, which also causes deviations in the experimental results

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