Answer:The constants are such entities which are not replaced or can not be changed but they remain the same for each object or entity or we can just say that the properties of any space given remains the same all the way from the start of any experiment of activity to the end of it.
Such as the mass,m , density,D, and the chemical bonding of the compounds and those objects under-consideration can not be changed or varied. In this case the mass of the plan made out of a certain material its density,D etc can not be varied.
As the different properties can not be changed in any such way or mechanism, while there are certain factors which are termed as the designing of the objects and the entities which includes the factor of temperature,T , pressure,P and the volume,V of the vary entity under-consideration.
While, the two group of students are provided by the specific manner and number of materials.As these materials can be improved by using the more advance form of instruments, as long as the technology exists the students will be able to control the different errors and improving there quality of work, as each measurement and experimentation requires more accuracy and precision for measuring the different factors.
Step-by-step explanation:your welcome