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What are the control variables of physics experiment in junior high school Let's give examples instead of big discussions. Let's name each one
Research friction; voltammetric resistance; explore the size of pressure and what factors; explore the relationship between current and voltage in the circuit; explore the experiment of specific heat capacity;
Physical control variable method
How to calculate the control variable method in Physics (not about electricity) I'm only in the eighth grade. At the beginning, the topic is probably to give you a table with "swing length, swing quality and cycle" on it
How accurate is the "guard line of a river" in physics
The control variable method is not an algorithm, but an experimental method. For a natural phenomenon, I want to study the factors that affect this phenomenon. First of all, suppose which factors will affect the experimental results, and then change one of them, control the other factors unchanged, to see if it has an impact on the results. For example: the simple pendulum experiment you said
What are the names of the controlled variable experiments
To study the factors of the effect of influence;
The factors related to sliding friction force are studied;
The pressure inside the liquid is studied;
This paper studies the relationship between the tone of the strings and the thickness, tightness and length of the strings;
The factors that affect the speed of liquid evaporation are studied;
The relationship between the heat absorption of objects and the type, mass and temperature of materials is studied;
The factors influencing the resistance are studied;
The relationship between current, voltage and resistance is studied;
Study the factors related to electric work or electric heating;
The factors that influence the force on the conductor in the magnetic field are studied;
The directional factors affecting the induced current are studied;
Physical experiments are carried out to study which factors are related to kinetic energy (or gravitational potential energy);
Biological grouping control experiment, etc
RELATED INFORMATIONS
- 1. On the experiment of "control variable method"
- 2. What is the difference between the control test method and the control variable method How to choose? Is there a difference between doing it at the same time and not at the same time?
- 3. How much does a physics book weigh And the weight of a desk, the weight of an apple
- 4. Now I'm in the second year of junior high school. I want to buy a physics book. Please introduce it to me Such as the title, recommend good I give bonus points!
- 5. How to use the control variable method to get the experiment?
- 6. The rainbow appears in the sky after the rain. It's light______ The propagation speed of different colors of light in the air is different______ If the wavelengths of red, orange, yellow, green, blue, indigo and purple light decrease in turn, the light with the highest frequency is the one with the highest frequency______ Color light
- 7. The propagation of physical light 1. The phenomenon of solar eclipse is explained by the () principle of light 2. The light from the sun will reach the earth in about 8 minutes. Please calculate the distance between the sun and the earth, which is about () M 3. The principle of pinhole imaging is () 4. Pinhole imaging is formed by ()
- 8. The propagation speed of sound and light in the air is about 340m / s and 3 × 108m / s respectively. In the 100 meter race, if the timekeeper starts to count when he hears the starting gun, the time of counting is longer than the actual running time of the athlete______ (choose "more" or "less")______ s．
- 9. What are the experiments of analogy in physics
- 10. "When we encounter bad things, we should consider the good things contained in them, and also consider the worse situation." in fact, good things and bad things can often be transformed into a contradictory unity,
- 11. The control variable method is used in those experiments in junior high school physics learning
- 12. 8. The Chang'e-1 lunar exploration satellite developed by our country runs along the elliptical orbit with the near moon point and the far moon point. When the satellite moves from the near moon point to the far moon point, the satellite () increases () decreases (both filled with "kinetic energy" or "gravitational potential energy")
- 13. If the two bulbs of "220 V & nbsp; 25W" and "220 V & nbsp; 40W" are connected in parallel to the 220 V circuit first, and then connected in series to the same circuit, then () A. The total power consumption of two lamps connected in parallel is greater than that in series D. the total power consumption of two lamps connected in series is greater than that in parallel
- 14. Junior high school physics: energy conversion, about internal energy Please give examples of the life in which internal energy is converted into other forms of energy and other forms of energy are converted into internal energy In addition, when baking bread in an electric oven, is it right that electric energy is converted into internal energy? Generally speaking, most of the internal energy is converted into other energy by gas or liquid? In addition, can the energy of solid be converted into internal energy by other energy? Isn't its molecular structure very stable?
- 15. The difference between energy conversion and transfer
- 16. The migration and transformation of heavy metals in soil are mainly physical and chemical processes This is a judgment question, right or wrong! Some textbooks also say that there are mainly physics,
- 17. Discussion on energy transformation or transfer in junior high school physics State how the following energy is transformed or transferred 1. Rocket points and then soars 2. The flying meteor has a luminous tail People feel warm when they are in the sun 4. Use solar water heater to boil water 5. When the tube filled with water blocked by the plug is heated, the plug is flushed open Thank you~~~
- 18. What is equivalent substitution method?
- 19. Equivalent substitution method i want!
- 20. What is the physical meaning of D in D-value method?