Question

what is the mass? how we know the mass of any object ​

Answer 1

Mass is defined as how much stuff a body contains...

SI unit :- Kg

Answer 2

Mass is a measure of the amount of matter in an object.Mass is usually measured in grams (g) or kilograms (kg).Mass measures the quantity of matter regardless of both its location in the universe and the gravitational force applied to it. ... Your mass on the earth and the moon are identical.