Discuss the principle of causality and guess what is the reason for the change, for example, the flight path of a ball hitting a wall; the temperature of the conductor through which the current flows.
The reason for the change in the trajectory of the ball in hitting the wall, the reason for the increase in the temperature of the conductor through which the current flows, in the thermal effect of the current.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.