fruit power generation science small experiment potato power generation cola power generation technology small production small invention

name: fruit power generation potato power generation cola power generation

item no.: dx:105-a dx:105-b

packing: packing bag

product size:

single weight: 0.03 (kg)

packing number: 1000 (pcs)

box gauge: 60*50*55 (cm)

fruit battery

the power generation principle of fruit batteries is that the electrochemical activities of the two metal sheet are different. among them, the more lively metal sheet can replace hydrogen ions of acidic substances in fruits, because positive charges are generated, the whole system needs to remain stable (or charge is generated, which causes the following results), so under the condition of forming the primary battery, the electron keeps the stability of the system from the loop, in theory, the current size is directly related to the concentration of tartaric acid (if it is to be expressed as a functional relationship, then this function is actually related to ionic strength and is also a quantitative relationship, it has a qualitative relationship with ion concentration). in this case, if the length of the circuit changes, it will inevitably cause the change of the circuit, so it will also cause the change of voltage.

cola battery

science and technology models mainly refer to land, sea and empty models. scientific and technological model activities integrate science and competition, hands-on and brain-moving, and are deeply loved by the majority of teenagers. its main function is also to cultivate and improve the comprehensive hands-on innovative skills and high quality of teenagers. therefore, at the turn of the century. deepening the reform, vigorously advocating the new form of quality education, and actively carrying out scientific and technological model activities are effective measures for the full implementation of quality education.
a broad vision to enrich scientific knowledge
science and technology model activities have rich knowledge, take navigation model as an example: in the process of making and sailing navigation model, students can learn why the ship floats and how the propeller maintains stability. why does the propeller produce the power ship run fast? why didn't the titanic sink immediately after the attack and why couldn't hide from the iceberg...... if you go deep, students will come into contact with radio remote control transmitter and receiver; learn (or master) force, density, gravity, pressure, magnetic field, ship structure, engine structure and principle, radio, material selection...... a lot of knowledge. there are many knowledge that is often needed in life without "textbooks. from this, we can inspire students and those science and technology are inspired from animals. can you imagine boldly and make a scientific and technological model? some think of dragonflies and planes, fish-shaped association with torpedo, etc. and can make some simple aircraft models, etc. in this way, students in science and technology model activities will contact and apply all kinds of knowledge to supplement a lot of book knowledge, broaden students' horizons and enrich students' extracurricular life, at the same time, i have learned more scientific knowledge.
second, cultivate logic and thinking ability
scientific and technological model activities require all participants to have dialectical, holistic and strict scientific thinking methods. "although spadger is small, everything is complete". small scientific and technological models are large, real cars, boats and planes are made in a certain proportion; it is a whole, pulling the whole body together.
a model plane for competition airborne period has to go through two stages of high-speed climbing and low-speed gliding to adjust the climbing stage, it is mainly the adjustment of angle of attack after ground tension line and two half wings are twisted. although the position of the center of gravity, the installation angle of the wing and the flat tail and the rudder also have certain influence on the climbing posture of the aircraft, the changes of these parts directly affect the performance of the model gliding stage, therefore, in the design and adjustment, we must comprehensively consider the different stress situations and solutions in these two stages. another example is "in the design and manufacture of cars, ships and aircraft models, the selection of material strength, rigidity and weight is very serious, and the best scheme must be selected from the two. therefore, science and technology model activities require teenagers to be dialectical, holistic and scientific in thinking methods. otherwise, a small mistake will make the performance of the science and technology model worse or even scrap.
it can be seen that people's initial thinking starts from action. the thinking characteristics of students are mainly in the form of specific image thinking. thinking cannot be separated from image and action. in the operation activities, students should not only look at and do things, but also think and say, the external operation process is organically combined with the dialectical, holistic and scientific nature in the internal intellectual activities, thus effectively promoting their thinking development.
third, cultivate good habits
science and technology model activities are conducive to shaping students' good personality, cultivating students' strong perseverance and pioneering spirit, as well as being careful and patient, forming rigorous scientific attitude in work, etc.
1. scientific time arrangement. students need a certain amount of time and energy to face homework, various interests and cultivation of special skills. students must arrange time scientifically and reasonably in order to be orderly and busy without chaos.
2. work begins and ends. at present, most students are only children. they are afraid of suffering and doing things without perseverance. they often give up halfway. if they choose their own activities, let them try their best to complete a scientific and technological model work, interest will be higher, because they all like to play with power toys. from this perspective, they will also overcome the inertia in the production process slowly and persistently complete their masterpieces. thus, they have cultivated their habit of doing things from beginning to end.
3. collectivism spirit. students design, make and compete together, help each other, compare and learn from each other. in this way, students' collectivism spirit is cultivated. make students have others in mind and learn how to get along with others. in this way, under the condition of socialist market economy, we can create a great career with others. the age of closing the door to boil asphalt like the curies is gone forever. now the society needs the cooperation of talent groups like apollo project to transform the world and create the future.
4. stimulate students' interest in exploring the field of science and technology
a scientist or inventor undoubtedly has a strong interest in what he loves, then explores it and studies it, and then achieves fruitful results in that field. now we make and assemble scientific and technological models for students, so that they can understand the formation of power, the generation of buoyancy, the influence of magnetic field, etc, it has laid a solid foundation for their interest in research and exploration in this field in the future and also broadcasted the hope of success.