-
Anonymous users2024-02-07The physics formula for the third year of junior high school is as follows:
1. W i2rt u2t r (pure resistance formula).
r＝1/r1＋1/r2[r＝r1r2/(r1＋r2)]。
3. Q uit pt uq power u2t r (pure resistance formula).
4. Density calculation formula: =m v.
5. The formula for calculating solid pressure: P=F S, F represents pressure, unit ns represents area, unit M2P represents pressure, unit Pascal (Pa).
Physics Learning Methods:
Physics is the most basic discipline in the natural sciences, involving the motion, energy, and structure of everything around us. Studying physics is not only compulsory in school, but it is also widely used in various fields, such as engineering, medicine, astronomy, etc. Therefore, mastering the knowledge of physics is very important for future development.
Here's how to learn physics.
1.Establish a good mathematical foundation: Physics requires a strong mathematical foundation, especially for advanced physics. Therefore, students should pay attention to the study of mathematics, especially algebra, geometry and trigonometry.
2.Mastering physics concepts: Many concepts in physics are very abstract, and as such, students need to spend time understanding and remembering these concepts and learning to apply them to solve problems.
3.Understanding Physics Formulas: Physics is a discipline that uses mathematical formulas as its main expression. Students should understand the meaning and purpose of each formula, and how to use it correctly to solve problems.
4.Do practice questions: Practice questions are one of the best ways to consolidate what you've learned. Students should do more exercises with different levels of difficulty to help them better understand physics concepts and formulas, and improve their problem-solving skills.
5.Cooperative learning: Studying physics with others can help students understand a variety of concepts and puzzles. Through cooperative learning, students can share each other's experiences and knowledge, and work together to develop new ideas and solutions.
6.Seeing** and visiting labs: There is now a lot of excellent education** that can help students better understand physics concepts and formulas. In addition, a visit to a laboratory or museum allows students to see real-world applications of physics and to understand physical phenomena intuitively.
7.Finding practical applications of problems: Students can look for real-life problems and use their knowledge of physics to solve them. This deepens their understanding of physics concepts and formulas and stimulates their interest in learning physics.
In conclusion, physics is a subject that requires a strong mathematical foundation, an understanding of abstract concepts, and specialized knowledge to master. Students need to listen carefully in class, do more practice problems, and look for real-world applications to enhance their practical application skills, and I hope that the above suggestions can help students learn and master physics better.
-
Anonymous users2024-02-06It is very important to learn junior high school physics and master physics formulas, and the following is a summary of the physics formulas for junior high school, hoping to help you learn physics.
1.Velocity. (1) Definition: Velocity is a physical quantity that describes the speed and direction of the motion of a particle, which is equal to the ratio of the displacement to the time taken for the displacement to occur.
2) Formula: v=s t (v is the speed s is the distance and t is the time) 2Gravity. (1) Definition: The force experienced by an object due to the attraction of the earth is called gravity.
2) Formula: g = m * g (g is the gravity m mass of the object g gravity coefficient) 3Density. (1) Definition: The ratio of the mass to the volume of a substance.
2) Formula: =m v ( is the density m mass of the object v the volume of the object)4Pressure. (1) Definition: The ratio of the pressure to the area of force on an object is called pressure.
2) Formula: p=f s (pressure p pressure f force area s) 5Liquid pressure.
Formula: p = gh ( is the density of the liquid, g is the gravitational coefficient, g = ; h is the depth) 6Mechanical work.
1) Definition: Work is equal to the product of the force and the distance that the object passes in the direction of the force (2) Formula: w = fs (w is the work f is the force physically experienced and s is the distance) 7
Power. (1) Definition: The power of work done per unit of time.
Power is a physical quantity that indicates how fast or slow an object does work.
2) Formula: p=w t (power p work w time t) i i1 i2
u＝u1＋u2
r r1 r2 (1), w uit pt uq (universal formula), w i2rt u2t r (pure resistance formula).
u1 u2 r1 r2 (partial pressure formula).
p1/p2＝r1/r2
r＝r1r2/(r1＋r2)]
Shunt formula) 1.Current intensity: i q power t
2.Resistance: r= l s
3.Ohm's Law: i u r
4.Joule's Law:
1）q＝i2rt
2) Q uit pt uq power u2t r (pure resistance formula).
Series: i=i1+i2 u=u1=u2 r=r1+r2 parallel: i=i1=i2 u=u1+u2 r=r1xr2 r1+r2 Ohm's law formula: >>>More
The phenomenon of inducing electromotive force due to changes in magnetic flux (when a part of a conductor in a closed circuit moves to cut magnetic field lines in a magnetic field, an electric current is generated in the conductor, and this phenomenon is called electromagnetic induction.) ） >>>More
Question 1 b Question 2: Object to object.
Question 3: Ceiling. >>>More
The heat absorbed by the object is determined by the mass and specific heat capacity of the object, and when the mass is constant, the smaller the specific heat capacity, the less heat is required to raise one degree; The rapid heating is that the same heat is absorbed in the same time, and the specific heat capacity is smaller, that is, the unit mass is increased1 and the heat absorbed is less. >>>More
The quality remains the same. There will be a gap between the bones of the human body, under the action of gravity, the gap will be reduced, in the case of weightlessness in space, the gap will become a little larger, and under the appearance display, the human body will become taller. >>>More