CN204288619U

CN204288619U - For the buoyancy experiment device of physics teaching

Info

Publication number: CN204288619U
Application number: CN201420590844.1U
Authority: CN
Inventors: 王诗元
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-10-13
Filing date: 2014-10-13
Publication date: 2015-04-22
Anticipated expiration: 2024-10-13

Abstract

A kind of buoyancy experiment device for physics teaching, comprise upper opening, the end arranged at bottom, water containing transparent urceolus, it is characterized in that: in described urceolus, be placed with inner core, the height of described inner core is equal to or greater than the degree of depth of urceolus, the several millimeters of gaps to tens of milliseconds are left between described inner/outer tube, both made the volume of inner core be slightly smaller than the volume of urceolus, again the convenient interval observed between inner/outer tube, the density of described inner core is less than the density of water.Owing to leaving the several millimeters of gaps to tens of milliseconds between inner/outer tube, that is, the volume of inner core is slightly smaller than the volume of urceolus, only need urceolus in-built enter a small amount of water, water just can float the gravity object more much bigger than self water gravity, thus recognizes that the water of 5N can float the heavy object of 10N really, and then the implication that in profound understanding buoyancy formula, V arranges, also experience the interest of physics, strengthen liking Physics Learning.

Description

For the buoyancy experiment device of physics teaching

Technical field

The utility model relates to a kind of experimental apparatus, especially for the buoyancy experiment device of physics teaching.

Background technology

Buoyancy is the teaching difficulty of junior physics, and the key learning buoyancy well understands buoyancy formula, according to Archimedes principle: the object be immersed in liquid is subject to buoyancy upwards, and the size of buoyancy equals object and arranges gravity suffered by liquid.Namely F floating=G liquid row=ρ liquid gV arranges.Wherein V row represents the volume of the liquid that object arranges, for helping the implication of student's correct understanding V row, does usual arrangement have the water of such class exercise: 5N can float the object of 10N? great majority are thought can not, reason is the gravity that buoyancy that object is subject to equals liquid that it arranges and is subject to, can just how the water of 5N float the object of 10N altogether? have only by real experimental verification, student could be allowed to convince, but there is no now suitable experiment appliance, the difficulty of explanation is very large, and student does not understand yet.

Utility model content

For solving the problem, the utility model provides a kind of buoyancy experiment device for physics teaching, allows observation of students also can float the object more much bigger than its quality (or gravity) to a small amount of water.

The technical scheme that the utility model adopts is: a kind of buoyancy experiment device for physics teaching, comprise upper opening, the end arranged at bottom, water containing transparent urceolus, it is characterized in that: in described urceolus, be placed with inner core, the height of described inner core is equal to or greater than the degree of depth of urceolus, the several millimeters of gaps to tens of milliseconds are left between described inner/outer tube, both made the volume of inner core be slightly smaller than the volume of urceolus, again the convenient interval observed between inner/outer tube, the density of described inner core is less than the density of water.

Described inner core is hollow cylinder, and the top of described inner core is provided with enclosing cover, is placed with one or several balancing weight in described inner core.

The sidewall of described urceolus upper end is provided with the overflow pipe crossed out, and is placed with spilling water cup below described overflow pipe, the wall of described urceolus is marked with the scale of display volume, the wall of described spilling water cup is also marked with the scale of display volume.

Usage of the present utility model is: urceolus in-built enter a certain amount of water (measuring volume), calculate the gravity of water; Measure inner core and in join the total force of block; Inner core is placed on lightly in the water in urceolus, until inner core swims on the water surface; According to overflowing the volume of water, the gravity that can converse water in urceolus is how much newton, thus learns that gravity is that the water of how much newton has floated the inner core that gravity is how much newton truly.

The beneficial effects of the utility model are: owing to leaving the several millimeters of gaps to tens of milliseconds between inner/outer tube, that is, the volume of inner core is slightly less than the volume of urceolus, only need urceolus in-built enter a small amount of water, water just can float the gravity object more much bigger than self water gravity, thus recognizes that the water of 5N can float the heavy object of 10N really, and then the implication that in profound understanding buoyancy formula, V arranges, also experience the interest of physics, strengthen liking Physics Learning.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model;

Fig. 2 is using state of the present utility model intention

In figure: 1 urceolus, 2 inner cores, 3 balancing weights, 4 enclosing covers, 5 spilling water cups, 6 overflow pipes, 7 water.

Embodiment

As shown in Figure 1 and Figure 2, urceolus 1 is upper opening, bottom transparent vessel with the end, and the wall of urceolus 1 is marked with the scale of display volume, the sidewall of urceolus 1 upper end is provided with the overflow pipe 6 crossed out, and the below of overflow pipe 6 is placed with spilling water cup 5.The wall of spilling water cup 5 is also marked with the scale of display volume, object can be collected and measure the volume overflowing water.

Inner core 2 is placed with in urceolus 1, the height of inner core 2 is equal to or greater than the degree of depth of urceolus 1, leave the several millimeters of gaps to tens of milliseconds between inner/outer tube, make the volume of inner core 2 be slightly less than the volume of urceolus 1 on the one hand, make water can float the gravity object more much bigger than self water gravity; On the other hand, inner core 2 can be freed in and out in urceolus 1 and facilitate the interval observed between inner/outer tube, guaranteeing that inner core swims on the water surface under buoyancy of water effect, instead of fixing in urceolus, Enhancement test cogency.

Inner core 2 is hollow cylinder, and the top of inner core 2 is provided with enclosing cover, is placed with one or several balancing weight in inner core 2.Increase and decrease balancing weight, can changing the total force of inner core, making the density of inner core 2 when being less than water-mass density floatability at the water surface, can many experiments, strengthens confidence level.

Claims

1. the buoyancy experiment device for physics teaching, comprise upper opening, the end arranged at bottom, water containing transparent urceolus, it is characterized in that: in described urceolus, be placed with inner core, the height of described inner core is equal to or greater than the degree of depth of urceolus, the several millimeters of gaps to tens of milliseconds are left between described inner/outer tube, both made the volume of inner core be slightly smaller than the volume of urceolus, again the convenient interval observed between inner/outer tube, the density of described inner core is less than the density of water.

2., as claimed in claim 1 for the buoyancy experiment device of physics teaching, it is characterized in that: described inner core is hollow cylinder, and the top of described inner core is provided with enclosing cover, in described inner core, be placed with one or several balancing weight.

3. as claimed in claim 2 for the buoyancy experiment device of physics teaching, it is characterized in that: the sidewall of described urceolus upper end is provided with the overflow pipe crossed out, spilling water cup is placed with below described overflow pipe, the wall of described urceolus is marked with the scale of display volume, the wall of described spilling water cup is also marked with the scale of display volume.