What Are The Attributes of Mass?

Question

What Are The Attributes of Mass?

Answer 1

It resists acceleration.  F = m * a

Higher the mass, higher its inertia.

Answer 2

mass, energy, and momentum are related,

energy E, mass m, momentum p, speed of light in a vacuum c:

E^2 = m^2*c^4 + p^2*c^2

a mass will have a gravity potential, gravitational constant G,

this bends space time such that other masses are affected,

the exact form is complicated, but for two masses in an otherwise empty universe, the Newtonian force for distance r is

F = m1*m2*G/r^2, aligned with distance