CN2092130U

CN2092130U - Archimedes principle demonstrator in contrast mode

Info

Publication number: CN2092130U
Application number: CN 90219263
Authority: CN
Inventors: 韩景光
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-11-05
Filing date: 1990-11-05
Publication date: 1992-01-01

Abstract

The utility model relates to a contrast type Archimedean principle demonstrator, belonging to a physical teaching device. A pipe coil is sheathed on the cross beam of a square base support, two ergometers are hung on the pipe coil, weights are hung under one ergometer, a container which is full of liquid is put under the weights, and a container is hung under the other ergometer. Using the utility model, students can completely visually compare buoyancy stood by an object with the weight of discharge liquid in an experiment. Students can obtain the Archimedean principle without abstract conversion, so the effects of experiments are improved.

Description

Archimedes principle demonstrator in contrast mode

The utility model relates to a kind of experimental apparatus that is used for physics teaching.

Demonstration device at first the 136th page of checking Archimedes' principle that provides of national state-compiled textbook junior physics, be on the crossbeam of a Square seat bracket, to hang with a spring, spring is hung a keg down, keg is hung a weight down, weight is transferred a mouth cup that fills with liquid, and there is a cuvette that runs in liquid the below of mouth cup mouth.This Instrument structure is simple, but the scene is destroyed at any time in the experimentation, is not easy to students ' analysis phenomenon principle, can not contrast the suffered buoyancy of weight arranges liquid weight with it relation intuitively, and promptly experimental technique is too abstract, student's indigestion and acceptance.

The purpose of this utility model provides and a kind ofly can contrast the suffered buoyancy of object arranges the checking Archimedes' principle of liquid weight relation with it instruments used for education intuitively, thereby is easy to understanding and the acceptance of student to this experiment, improves teaching efficiency.

The purpose of this utility model is to realize like this, on the crossbeam of a Square seat bracket, be set with rotating coil, on coil, hang with two dynamometers with line, below a dynamometer, hang with weight, the below of weight is placed with the container that fills with liquid, hangs with the container that can catch the liquid that weight discharges below another dynamometer.

Such solution, the student can very find out that from two dynamometers the suffered buoyancy of object arranges the relation of liquid weight with it intuitively in experiment, do not need abstract conversion can draw Archimedes' principle, thereby improved experiment effect greatly.

Accompanying drawing has provided concrete structure of the present utility model.

On the crossbeam (2) of a Square seat bracket (1), be set with a rotating coil (3), scribble belt filler on the surface of crossbeam (2), with the friction of increase with coil (3).Upward hanging with two 2 bigger newton of scale with line demonstrates dynamometer (4), (5) at coil (3), below dynamometer (4), hang with heavy 2 newton's volumes and be 150 cubic centimetres cylindrical weight (6), the below of weight (6) is placed with the cup (7) of a filled with water, has fluid mouth (9) on the cup (7).Hang with heavy 0.5 newton, capacity greater than 150 cubic centimetres keg (8) below another dynamometer (5), the position of keg (8) is in the below of cup (7) fluid mouth (9), and the water of discharging from the fluid mouth all flows in the keg (8).For ease of regulating, make the winding direction of hanging wire on coil (3) of two dynamometers opposite, below hanging, coil (3) have the comparable section in addition of that section of dynamometer (4) of weight thick.

Experimental procedure of the present utility model is:

1, weighs up the weight of weight (6) and keg (8) simultaneously with two dynamometers;

2, rotate coil (3), weight (6) 1/3rd volumes are immersed in the water, write down its suffered buoyancy and the weight that arranges liquid;

3, rotate coil (3) again, weight (6) 2/3rds volumes are immersed in the water, write down its suffered buoyancy and the weight that arranges liquid;

4, be rotated further coil, make the whole entry of weight, write down its suffered buoyancy and the weight that arranges liquid.

From top four experimental datas, the student is easy to sum up the content of Archimedes' principle.

Claims

1, a kind of contrast formula Archimedes' principle demonstration device, belong to physics educational apparatus, it has a Square seat bracket (1), it is characterized in that on the crossbeam (2) of Square seat bracket (1), being set with rotating coil (3), upward hang with two dynamometers (4), (5) at coil (3) with line, hang with weight (6) below a dynamometer (4), the below of this weight (6) is placed with the container (7) that fills with liquid, hangs with a container (8) below another dynamometer.

2, demonstration device according to claim 1 is characterized in that the winding direction of hanging wire on coil (3) of two dynamometers (4), (5) is opposite.