form Chemistry, Zumdahl, 6ed. :
질량(mass) : 물체의 운동 상태를 변화시킬 때 물체가 나타내는 저항의 척도이다.(a measure of the resistance of an object to a change in its state of motion)
from wiki :
Mass is a fundamental concept in physics, roughly corresponding to the intuitive idea of "how much matter there is in an object". Mass is a central concept of classical mechanics and related subjects, and there are several definitions of mass within the framework of relativistic kinematics (see mass in special relativity and mass in General Relativity). In the theory of relativity, the quantity invariant mass, which in concept is close to the classical idea of mass, does not vary between single observers in different reference frames.
In everyday usage, mass is more commonly referred to as weight, but in physics and engineering, weight means the size of the gravitational pull on the object; that is, how heavy it is, measured in units of force. In everyday situations, the mass and weight of an object are directly proportional to each other, which usually makes it unproblematic to use the same word for both concepts. However, the distinction between mass and weight becomes important:
- for measurements with a precision better than a few percent, due to slight differences in the strength of the Earth's gravitational field at different places
- for places far from the surface of the Earth, such as in space or on other planets
Zumdahl 화학 교과서에 나와 있는 질량에 대한 설명이,
지금까지 들어본 질량에 대한 설명 중 가장 효과적인 설명이라는 생각이 든다.
위키에 나온 내용은 정의로써 원론적이며 핵심적인 내용으로 설명되어 있다.
