CN201181532Y - Physics teaching aid - Google Patents
Physics teaching aid Download PDFInfo
- Publication number
- CN201181532Y CN201181532Y CNU2008200075417U CN200820007541U CN201181532Y CN 201181532 Y CN201181532 Y CN 201181532Y CN U2008200075417 U CNU2008200075417 U CN U2008200075417U CN 200820007541 U CN200820007541 U CN 200820007541U CN 201181532 Y CN201181532 Y CN 201181532Y
- Authority
- CN
- China
- Prior art keywords
- resistance wire
- container
- thermometer
- teaching aid
- liquid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The utility model provides a physical teaching/learning aid for conducting an experiment of electric work, electric power, Joule's law, specific heat, or liquid evaporation refrigeration. The physical teaching/learning aid comprises an opening container, a resistance wire disposed in the container and having the wires at the two ends led out of the container, and a thermometer with one end inserted into the container, and is characterized in that the average area of the cross section of the container cavity is between the area of a circle with a diameter of 0.6cm and the area of a circle with a diameter of 3.8 cm; or the physical teaching aid includes a liquid thermometer and a resistance wire, and is characterized in that the resistance wire is spiral; and the liquid bulb of the liquid thermometer is surrounded in the spiral resistance wire. Or alternatively, the physical teaching aid includes a liquid thermometer and a resistance wire, and is characterized in that the resistance wire cures in the liquid bulb of the liquid thermometer; and two ends of the resistance wire extends from the liquid bulb. The physical teaching aid has the advantages that the practical temperature variation value is accordant with a theoretical value; the temperature variation is rapid; and the teaching aid can be visualized clearly for all the students in the classroom.
Description
Affiliated technical field:
The utility model is a kind of physical teaching aid, is specially to do electric work experiment in the physics or do the electric power experiment or do Joule law or do the specific heat experiment or do liquid evaporation refrigeration and test used teaching aid.
Background technology:
" the electric current acting is relevant with which factor ", " speed of electric current acting is relevant with which factor ", and " probing into of Joule law ", " the introducing experiment of specific heat " (different material of probing into equal in quality absorbs how much comparing of heat when the rising uniform temp), these are the emphasis experiment in the junior physics textbook, common point be with electric heater to caloic (as kerosene and or water or air etc., below be referred to as caloic) heating, experimental provision is by the dress open containers, place container and two ends to draw the outer resistance wire of container, and the interior thermometer composition of an end insertion container, there is following significant disadvantages:
1. caloic is many, and heat time heating time is oversize: water and kerosene must be with the vacuole submergences of thermometer, nearly at most 200 grams of quality, and 80 grams reach more than 10 minute heat time heating time at least, if adopt the large beaker of 500ml, then used liquid is more, heat time heating time is longer.
2. weak effect, cogency are low: because of the caloic consumption big, to heat more than ten minute water and kerosene, the heat radiation time is long, thermal loss is many and inhomogeneous, cause just the raise rise of 2-6 ℃ and temperature of the temperature of water or kerosene not to be linear, the temperature difference size of bad comparative descriptions water and kerosene, can only illustrate qualitatively electric work, electric power, electric heating, size relevant with certain factor, can not quantitatively illustrate.
3. visibility is too little, with a low credibility: as to test used temperature and count the little thermometer of student experiment in group, be recorded on the blackboard after have to taking out teacher's reading (or take out a student appear on the stage reading), most students can only see the general profile of operation of teacher experiment, cause many students " waiting teacher (or indivedual student) to do experiment ", experimental result is again that teacher (or certain student that appears on the stage) reads out, and is not that oneself is seen with one's own eyes, is unfavorable for that very teacher mobility student participates in enthusiasm.
Cause the reason of above-mentioned shortcoming to be:
1, the inside diameter of vessel excessive (so the used resistance wire of existing experiment all is to be disposed across in the container) that is used for the splendid attire caloic.The container that above-mentioned experiment is used to adorn water or kerosene is normally: the inner bag of flask, wide-necked bottle, calorimeter or beaker etc.
Through actual measurement, nominal volume is the round flask of 500ml, 250ml, and its interior diameter (hereinafter to be referred as internal diameter, also being like this in claims) maximum is about 10cm, 8.7cm.Nominal volume is the beaker of 250ml, 100ml, and its diameter is about 6.5cm, 5cm respectively.Use inner bag (can effectively the prevent heat leakage) internal diameter of more calorimeter to be about 6cm.As seen, the internal diameter of testing used container now is generally 5-10 centimetre, causes the caloic consumption big, and heat time heating time is long, and the heat radiation time is also long, and thermal loss is many and inhomogeneous, and weak effect is very poor.
The existing physical teaching aid of doing electric work, electric power, Joule law, specific heat experiment, form by the thermometer of adorning open containers, place container and two ends to draw in outer resistance wire of container and the end insertion container, wanting because of liquid is minimum can be with the vacuole and the whole submergence of resistance wire of thermometer, requirement on this liquid depth can make the liquid consumption restrain up to restraining extremely nearly 200 to tens.
2, the student of the about 30cm of the length thermometer that divides into groups is all adopted in existing experiment, and visibility is too little.
Summary of the invention:
The purpose of this utility model is: a kind of teaching aid of doing electric work, electric power, Joule law, specific heat experiment and liquid evaporation refrigeration experiment is provided, and has following characteristics: this teaching aid will accomplish that aspect effect temperature actual change value will be near theoretical value; It is fast that temperature variation is wanted, and just can finish an experiment smoothly in maximum 5 minutes; It is high that visibility is wanted, and the full student of class can both see the thermometer registration clearly.
The technical scheme that the utility model adopted is:
One, a kind of physical teaching aid, by the dress open containers, place in the container and the thermometer that draws in outer resistance wire of container and the end insertion container at two ends is formed, it is characterized in that the average area of described container intracavity xsect is that 0.6 centimetre the area of a circle is between 3.8 centimetres the area of a circle to diameter between diameter.
Perhaps:
Two, a kind of physical teaching aid is made of liquid-filled thermometer and resistance wire, it is characterized in that, described resistance wire twist, the vacuole of described liquid-filled thermometer is enclosed in the inside of this ressitance spiral.
Perhaps:
Three, a kind of physical teaching aid is made of liquid-filled thermometer and resistance wire, it is characterized in that, described resistance wire is solidificated in the vacuole of liquid-filled thermometer, and stretch out beyond the vacuole at the two ends of described resistance wire.
Substantially conceive one improvement as realizing the utility model: described container is a test tube shape container, and the internal diameter of described test tube shape container is between 0.8 centimetre and 3 centimetres.
Substantially conceive an one of improved plan further as realizing the utility model: the end that described thermometer inserts in the container is the temperature zone of accepting temperature variation, it is characterized in that: described vessel port place is plugged with the perforate plug, described thermometer passes perforate hole beyond the Great Wall and stretches in the container, the lead-in wire at described resistance wire two ends is outside perforate plug propelling container, and one section of described resistance wire or several sections also come around the temperature zone.
As realize the utility model conceive substantially one further improved plan two: the end that described thermometer inserts in the container is the temperature zone of accepting temperature variation, it is characterized in that: described vessel port place is plugged with the perforate plug, described thermometer passes perforate hole beyond the Great Wall and stretches in the container, the two ends lead-in wire of described resistance wire is outside perforate plug propelling container, described resistance wire is shape in the shape of a spiral, and described temperature zone is enclosed in the spiral inside that the resistance wire ring becomes.
The beneficial effects of the utility model are:
1, temperature raises fast: because of the liquid consumption was contained in the interior not enough 20ml of small test tube now from being contained in 200-80ml in beaker, flask, the calorimeter inner bag in the past, being reduced to, under the condition of same heat absorption, the speed that temperature raises has promoted several times.
2, the change amount of temperature differs bigger, and cogency is very strong.In experimentation, adopt the above-mentioned device of two covers to experimentize, because of the liquid consumption is few, when one of them of factors such as electric current, voltage, resistance, conduction time changes, just is reflected in the variation of fluid temperature very obviously and can becomes tangible direct ratio or inversely prroportional relationship.
3, experimental data and theoretical value are very approaching, meet the inquiry spirit of new curriculum reform.In experimentation, adopt the above-mentioned device of two covers to experimentize,, temperature few because of the liquid consumption raises fast, have little time heat radiation, two covering devices have same specification in addition, the rate of heat dispation unanimity, make that experiment measured data and theoretical value are very approaching, be convenient to teacher's explanation and student's understanding.
This is the open defect of other similar experiment at present, is subjected to teachers' welcome as improved gas heating formula experiment, but because can not become positive inverse ratio relation, thus have to make quantitative experiment, dare not also can't record data.
4, avoided the penetrating odor of kerosene, alcohol.Adopt this teaching aid, promptly use the big water of specific heat capacity to do electric work, electric power, Joule Law Experiment, phenomenon all is promptly obvious again soon, there is no need to raise speed with the little kerosene of specific heat capacity, alcohol as experiment in the past at all.
The cooling waiting time weak point of 5, next time testing, teaching is arranged compact:
As probing into during the electric current acting electric work relevant with which factor test doing, with R
1, R
2R has been measured in series connection
1, R
2After the temperature change amount of two liquid in container, the registration of waiting for two thermometers of should cutting off the power supply drops to when identical, again with R
1, R
2Parallel connection is with the relation of research electric current and electric work.Similarly, in " electric power is relevant with which factor ", " Joule law " experiment also there is the stand-by period.Shi Yan liquid consumption was many in the past, and the stand-by period has often surpassed five, six minutes, was unfavorable for teacher's teaching arrangement.
And liquid consumption of the present utility model is few, and temperature fall time midway is less than 1 minute, the arrangement that helps imparting knowledge to students.Use container if be ready to be equipped with replacing of appropriate amount of fluid in advance, then only need to change container and get final product.
6, meet experimental considerations in the textbook, need not to add hot-air, be convenient to the student and understand.
7, clear and intuitive, be convenient to observe: adopt the above-mentioned device of two covers to experimentize, the adjustable positions of two large size thermometers on panel, therefore can allow the initial value of two thermometer registrations be positioned at identical graduation place on the movable panel, need not mental arithmetic, just can directly read variation of temperature value on two thermometers.
Description of drawings:
Fig. 1 is the one-piece construction figure of embodiment 1
Fig. 2 is the partial enlarged drawing of Fig. 1
Fig. 3 is the synoptic diagram that is attached to the portable panel on Fig. 1
Fig. 4 is the figure of portion of thermometer vacuole end office (EO) of embodiment 2
Fig. 5 is the figure of portion of thermometer vacuole end office (EO) of embodiment 3
Among the figure: 1. container, 2. resistance wire, 3. vacuole, 4. lead-in wire, 5. perforate plug, 6. temperature scale district, 7. thermometer, 8. support, 9. liquid level, 10. movable panel, 11. thickened area.
Embodiment:
Embodiment one, as Fig. 1, Fig. 2, shown in Figure 3:
The end of thermometer 7 near vacuole 3 is enclosed within the perforate plug 5.Resistance wire 2 is wrapped on the vacuole 3 of thermometer 7.The lead-in wire 4 at resistance wire two ends is passed perforate plug 5 (can pass from the inside of perforate plug, or pass from the edge of perforate plug and bright glue is fixed), so that the spiral form resistance wire is played the setting effect.An amount of caloic of packing in container 1 is socketed in container 1 outer wall of perforate plug 5 again from the below.
For ease of operation and contrast, should as shown in Figure 2 two devices as shown in Figure 1 be fixed on the support 8, and in support intermediate fabrication temperature scale district 6.
For directly reading the change amount of temperature, remove the process of calculated difference behind the reading from, should be as shown in Figure 3, make a movable panel 10 of using as temperature change amount reading.The both sides that scale on the movable panel 10 should be made chequered with black and white striped and same striped all mark temperature value, also are the convenience for reading.This movable panel 10 preferably air brushing is made, because of spray painted paper two sides overlay film, be difficult for dirty, also be unlikely to too soft, clamping and can move up and down zeroing between the panel of Fig. 2 and two thermometers easily.
Usage:
1, it is relevant to be used to probe into this factor of speed and which of electric current acting.
Only need cover device as shown in Figure 2.In container 1, pack into the water (or kerosene) of about 15ml.
With lead the lead-in wire 4 at resistance wire 2 two ends is connected to low-tension supply, switch, reometer, voltage table and forms circuit, just can finish one time experimental record in 2 minutes satisfactorily.Repeatedly change the resistance of resistance wire again, repeat above experimentation, collect experimental data.
2, probing into electric current does work relevant with which factor.
Need two covers device as shown in Figure 2, promptly as shown in Figure 1, two covering devices are solidified togather.
Actual measurement example: R
1=2.85 Ω, R
2=5.78 Ω, both differ 2.02 times, the water of the 13ml that in vitro respectively packs into.
1., as the equal (R of electric current
1, R
2Be connected on the stabilized voltage supply of 10V) time, U
1=3.3V, U
2=6.6V, after 2 minutes, R
1In vitro temperature has raise 10 ℃, R
2In vitro temperature has raise 21 ℃.U
2Be U
1Twice, R
2Other kerosene temperature change amount is about R
1The twice of other kerosene temperature change amount, data and theoretical value are very identical.
2., as the equal (R of voltage
1, R
2Be connected in parallel on the stabilized voltage supply of 4V shelves (surveying not enough 4V)) time, actual measurement I
1=1.2A, I
2=0.6A, after 1 minute, R
1In vitro temperature raises 13 ℃, R
2In vitro temperature raises 3 ℃.I
1With I
2Differ 2 times, the temperature change amount differ 2 square doubly, data and theoretical value are also very goodly identical.
3, be used to study Joule law, device is as Fig. 1.Get R
2Be R
1Twice, two water of in vitro all packing about 13ml into can experimentize.
4, be used for the inquiry experiment of specific heat:
Two resistance wires among Fig. 1 are changed into identical, even R
1=R
2, water and the kerosene of about 16g that packs in two containers also only need 2 minutes, just can obtain very obvious effects.
5, be used for liquid evaporation refrigeration experiment:
As shown in Figure 1, remove container 1, resistance wire 2, lead-in wire 4, perforate plug 5 among Fig. 1, only keep thermometer 7, support 8, movable panel 10 among Fig. 1, the bale of cotton that will soak alcohol is therein above the vacuole 3 of a thermometer 7, can see that the thermometer registration that is surrounded by cotton sharply descends at once, and the thermometer registration of not wrapping cotton is constant, illustrates that liquid evaporation truly has refrigeration.
Illustrate:
1, for above-mentioned container:
As described in preceding background technology: a too poor major reason of existing experiment effect is that used container is too big, and inside diameter of vessel is generally 5-10 centimetre.The utility model is limited to the internal diameter of this container between 0.8-3.8 centimetre, be for and prior art between mark distinct boundary line, suitably dwindled claimed scope.The xsect of considering used container differ establish a capital apparent circle; xsect as used container can be square, rectangle, fillet square, fillet rectangle, ellipse etc.; can obtain experiment effect preferably in the same old way; also should be in protection domain of the present utility model; therefore the area of a circle that the average area of this container intracavity xsect is limited to diameter and is 0.6 centimetre is between 3.8 centimetres the area of a circle to diameter, the reasons are as follows:
The vacuole of the existing thermometer in laboratory typically has a diameter from 0.5-0.8 centimetre, adds the resistance wire of winding, and vacuole adds outer overall diameter around resistance wire and is about 0.6-0.9 centimetre.The applicant once put into the thermometer that is wound with resistance wire on the vacuole open containers of following specification and did experiment, had all obtained experiment effect preferably:
Internal diameter is 0.6 centimetre a glass tube;
Internal diameter is 0.8 centimetre a glass tube;
The small test tube of Φ 12mm * 73mm (the actual measurement internal diameter is 1.1 centimetres);
The small test tube of Φ 12mm * 73mm (the actual measurement internal diameter is 1.1 centimetres);
In the medium size test tube of Φ 15mm * 150mm (the actual measurement internal diameter is 1.2 centimetres);
In the medium size test tube of Φ 20mm * 100mm (the actual measurement internal diameter is 1.8 centimetres);
In the Boiling tube of Φ 32mm * 200mm (the actual measurement internal diameter is 3 centimetres);
Nominal capacity is the drop bottle (the actual measurement internal diameter is 3.3 centimetres) of 30mL;
Nominal capacity is the wide-necked bottle (the actual measurement internal diameter is 3.8 centimetres) of 60mL
Nominal capacity is the narrow-mouthed bottle (the actual measurement internal diameter is 3.9 centimetres) of 60mL.
Nominal capacity is the drop bottle (the actual measurement internal diameter is 4.1 centimetres) of 60mL.
Nominal capacity is the wide-necked bottle (the actual measurement internal diameter is 4.4 centimetres) of 60mL.
As preference, described container is a test tube shape container, and the internal diameter of described test tube shape container be the reasons are as follows between 0.8 centimetre and 3 centimetres:
As mentioned above, the common thermometer vacuole adds the overall diameter that twines resistance wire and is about 0.6-0.9 centimetre, with internal diameter is that 0.8 centimetre test tube shape container is a lower limit, has just guaranteed that vacuole adds the unlikely sidewall that touches container of resistance wire of winding, reduces thermal loss effectively.With internal diameter is that 3 centimetres test tube shape container is the upper limit, is to make used container be unlikely to big slightly, guarantees that experimental temperature raises comparatively fast.
2, for thermometer
The liquid-filled thermometer that the used thermometer of the utility model not necessarily will be confined to use always also can be finished above-mentioned Physical Experiment satisfactorily with bimetallic system cell, electronic thermometer etc., if select liquid-filled thermometer for use, the temperature zone on the then described thermometer is a vacuole; If select bimetallic system cell for use, the temperature zone on the then described thermometer is a sensing rod for temperature; If select electronic thermometer for use, the temperature zone on the then described thermometer is a probe.
If this teaching aid is done teacher's usefulness of demonstration on class, then for obtaining visibility preferably, the length of described lens-fronted tubing should be greater than 50 centimetres, and liquid level rises to maximum temperature value from the minimum temperature value and should move 30 centimetres at least in the described thermometer.It is the little thermometer that described thermometer should adopt demonstration thermometer rather than student experiment in group to use.
If the learning aid that this teaching aid is used as student experiment in group, described thermometer can adopt the student to make the about 30 centimetres little thermometer of length that grouping experiment is used.
The utility model name is called " physical teaching aid "; mean the justice of the teaching aid that can do a plurality of Physical Experiments; if adopt thinking of the present utility model to make " learning aid " or even the inquiry " toy " that the student operates usefulness, also in protection domain of the present utility model.
3, for subsystem
As described in the usage part of front, if do the electric work experiment, only need a cover cover subsystem as shown in Figure 2, this cover subsystem is made up of an open containers, a perforate plug, a resistance wire, a thermometer.
If do the experiment of electric power, Joule law, specific heat experiment and liquid evaporation refrigeration, then need two covers as the subsystem of Fig. 2, and preferably as shown in Figure 1 mode is overlapped subsystems with two and is fixed on the same support as showing.
For reducing the experimental error that causes because of heat radiation, guarantee experiment effect, the specification of two subsystem split shed containers should be identical, the specification of thermometer should be identical in two subsystems, the spiral size of resistance wire in two subsystems, density degree should be identical, and resistance wire should be identical with spatial relation between the thermometer vacuole in two subsystems.When doing electric power, two experiments of Joule law, the resistance value of described two sub-system resistance silks should be different, and preferably become integral multiple (being convenient to analyze); When doing the specific heat experiment, the resistance value of described two sub-system resistance silks must be identical, to guarantee providing identical heat to different caloics.
Be the contrast experiment of liquid evaporation refrigeration, then want two identical thermometers, need not resistance wire.
Therefore; claims 1,2,3,4 and claim 8,9 do not propose " subsystem " noun; mean: no matter this subsystem is independent (this moment just no longer be called subsystem), or paired, all should be in protection domain of the present utility model.
As described in front embodiment 1, the major reason that the utility model is obtained good experiment effect is: the consumption that has reduced caloic significantly.As same thinking, the consumption of described caloic also can reduce further, the outer caloic of clear-cut cancellation liquid-filled thermometer, directly resistance wire is wrapped on the outer wall of thermometer vacuole, the liquid in the vacuole as heated caloic, as shown in Figure 4, resistance wire 2 is wound in spiral fashion at the position of the vacuole 3 of thermometer 7, lead-in wire 4 through the resistance wire two ends is connected to external power, experiment showed, also and can obtain good experiment effect.
All the other are similar to Example 1, as make some experiment (as the electric work experiment) need one and overlap device shown in Figure 4, doing the other experiment then needs two covers device as shown in Figure 4 to use in pairs, and at this moment the identical device of this two cover should be fixed on the same support and use, or the like.
As described in front embodiment 2,, to the heating of the liquid in the vacuole, resistance wire can be stretched into the inside heating of vacuole again why not with resistance wire since resistance wire can be wrapped on the outer wall of thermometer vacuole!
As shown in Figure 5, resistance wire 2 is by 4 inside that are fixed on vacuole 3 that go between, and for improving stability, vacuole 3 is configured to thickened area 11 with the joint of lead-in wire 4.Also be analogous to embodiment 1 through the applicant in the manufacturer place of the thermometer effect that experiment showed, tailor-made and afterwards.
All the other are similar to Example 1, as make some experiment (as the electric work experiment) need one and overlap device shown in Figure 4, doing the other experiment in addition then needs two covers device as shown in Figure 4 to use in pairs, and at this moment the identical device of this two cover should be fixed on the same support and use, or the like.
Claims (9)
1, a kind of physical teaching aid, by open containers, place in the container and thermometer that resistance wire that lead-in wires propelling container in two ends is outer and an end insert in the container is formed, it is characterized in that the average area of described container intracavity xsect is that 0.6 centimetre the area of a circle is between 3.8 centimetres the area of a circle to diameter between diameter.
2, physical teaching aid as claimed in claim 1 is characterized in that: described container is a test tube shape container, and the internal diameter of described test tube shape container is between 0.8 centimetre and 3 centimetres.
3, physical teaching aid as claimed in claim 2, the end that described thermometer inserts in the container is the temperature zone of accepting temperature variation, it is characterized in that: described vessel port place is plugged with the perforate plug, described thermometer passes perforate hole beyond the Great Wall and stretches in the container, the lead-in wire at described resistance wire two ends is outside perforate plug propelling container, and one section of described resistance wire or several sections also come around the temperature zone.
4, physical teaching aid as claimed in claim 2, the end that described thermometer inserts in the container is the temperature zone of accepting temperature variation, it is characterized in that: described vessel port place is plugged with the perforate plug, described thermometer passes perforate hole beyond the Great Wall and stretches in the container, the lead-in wire at described resistance wire two ends is outside perforate plug propelling container, described resistance wire twist, described temperature zone is enclosed in the spiral inside that the resistance wire ring becomes.
5, physical teaching aid as claimed in claim 4, it is characterized in that: described open containers, perforate plug, resistance wire, temperature are counted the cover subsystem in this physical teaching aid structure composition, this physical teaching aid is made of the such subsystem of two covers, the specification of two subsystem split shed containers is identical, the specification of thermometer is identical in two subsystems, the spiral size of resistance wire in two subsystems, density degree are identical, resistance wire is identical with spatial relation between the thermometer vacuole in two subsystems, and the resistance value of described two sub-system resistance silks can be similar and different.
6, physical teaching aid as claimed in claim 5 is characterized in that: described temperature is counted liquid-filled thermometer, and described temperature zone is the vacuole of liquid-filled thermometer.
7, physical teaching aid as claimed in claim 6 is characterized in that: described two subsystems are fixed on the same support side by side, dispose movable panel on the described support.
8, a kind of physical teaching aid is made of liquid-filled thermometer and resistance wire, it is characterized in that, described resistance wire twist, the vacuole of described liquid-filled thermometer is enclosed in the inside of this ressitance spiral.
9, a kind of physical teaching aid is made of liquid-filled thermometer and resistance wire, it is characterized in that, described resistance wire is solidificated in the vacuole of liquid-filled thermometer, and stretch out beyond the vacuole at the two ends of described resistance wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200075417U CN201181532Y (en) | 2008-03-31 | 2008-03-31 | Physics teaching aid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200075417U CN201181532Y (en) | 2008-03-31 | 2008-03-31 | Physics teaching aid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201181532Y true CN201181532Y (en) | 2009-01-14 |
Family
ID=40251030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200075417U Expired - Fee Related CN201181532Y (en) | 2008-03-31 | 2008-03-31 | Physics teaching aid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201181532Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102402883A (en) * | 2010-09-10 | 2012-04-04 | 宁波奇科威数字教学设备有限公司 | Resistance device for electric heating effect experiments |
| CN107644573A (en) * | 2017-11-09 | 2018-01-30 | 令狐荣鸿 | Justify physics teaching demonstration device during one kind etc. |
-
2008
- 2008-03-31 CN CNU2008200075417U patent/CN201181532Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102402883A (en) * | 2010-09-10 | 2012-04-04 | 宁波奇科威数字教学设备有限公司 | Resistance device for electric heating effect experiments |
| CN102402883B (en) * | 2010-09-10 | 2014-04-09 | 宁波奇科威数字信息技术有限公司 | Resistance device for electric heating effect experiments |
| CN107644573A (en) * | 2017-11-09 | 2018-01-30 | 令狐荣鸿 | Justify physics teaching demonstration device during one kind etc. |
| CN107644573B (en) * | 2017-11-09 | 2024-02-13 | 贵州嘉弘科技服务有限公司 | Isochronous circle physical teaching presentation device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201181532Y (en) | Physics teaching aid | |
| CN105806994A (en) | Automatic potentiometric titrator | |
| CN203311706U (en) | Joule 's law experiment apparatus | |
| CN213751577U (en) | Temperature digital display type joule law experimental device | |
| CN205645053U (en) | Digital display joule law experimental apparatus | |
| CN211506887U (en) | Heat conduction experiment demonstration instrument | |
| CN204516181U (en) | A kind of simple liquid expanded by heating apparatus for demonstrating | |
| CN206096140U (en) | Enzyme yoke plate controllable temperature reaction box | |
| CN102945636B (en) | Presentation device for current effect | |
| CN206421707U (en) | For probing into experimental provision of the color to thermal absorptivity | |
| CN205541585U (en) | Fast thawing formula joule law experimental apparatus | |
| CN202523280U (en) | Joule law demonstrator | |
| CN205487030U (en) | Be used for demonstrating coefficient of heat conductivity measuring teaching device | |
| CN209281710U (en) | It is a kind of for studying the tester of Joule's law | |
| CN202662202U (en) | Closed container device of temperature digital display Joule law demonstrator | |
| CN216486928U (en) | Device for experiment teaching of cold water heating, liquid and air expansion with heat and contraction with cold | |
| CN204423708U (en) | A kind of politics teaching demonstration teaching aid | |
| CN2348446Y (en) | Joule law demonstrator | |
| CN204257081U (en) | Probe into ice fusing point, water boiling point, specific heat of liquid combination unit | |
| CN208422214U (en) | A kind of electrophysics experimental provision | |
| CN212207173U (en) | Be applied to ecological plant dyestuff heat resistance performance experimental apparatus | |
| CN211349835U (en) | Joule law exploration device and Joule law exploration device set | |
| CN211062303U (en) | Joule's law tester | |
| CN104392645A (en) | Combined equipment for researching ice melting point, water boiling point and specific heat capacity of liquid | |
| CN110660300A (en) | Joule's law experiment demonstration instrument and experiment method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090114 |