Physics – science about the nature. It describes processes and the phenomena of the world around at the macroscopic level – the level of the small bodies comparable with sizes of the person. For the description of processes of the physicist uses a mathematical apparatus.
Instruction
1. From where do physical formulas undertake? Simply the scheme of receiving formulas can be submitted so: it is asked, hypotheses are made, a series of experiments is made. Results are processed, there are concrete formulas, and it gives rise to the new physical theory or continues and develops already available.
2. The person studying physics should not pass all this difficult way anew. It is enough to master the central concepts and definitions, to study the scheme of an experiment, to learn to remove fundamental formulas. Naturally not to do without strong mathematical knowledge.
3. So, learn determination of the physical quantities relating to the considered subject. Each size has the physical sense which you have to understand. For example, 1 pendant is the charge passing through the cross section of the conductor in 1 second at current in 1 ampere.
4. Understand physics of the considered process. By what parameters it is described and how these parameters change throughout time? Knowing the main definitions and understanding physics of process, it is easy to receive the simplest formulas. As a rule, between sizes or squares of sizes directly proportional or inversely proportional dependences are established, the proportionality coefficient is entered.
5. By mathematical transformations it is possible to bring secondary out of primary formulas. If you learn to do it easily and quickly, the last can be not remembered. The main method of transformations – a substitution method: any size is expressed from one formula and is substituted in another. It is important only that these formulas corresponded to the same process or the phenomenon.
6. Also the equations can be put among themselves, to divide, multiply. Functions on time very often integrate or differentiate, receiving new dependences. Logarithming will be suitable for power functions. At a conclusion of a formula rely on result which you want to receive as a result.