# data[].attributes.body
The mass of an object is a fundamental property of the object; a numerical measure of its inertia; a fundamental measure of the amount of matter in the object. The usual symbol for mass is 'm' and its SI unit is kilogram.

In everyday usage, mass is often referred to as weight, the units of which are often taken to be kilograms. In scientific use, weight is the gravitational force acting on a given body, while mass is an intrinsic property of this body.

On the surface of the Earth, the weight W of an object is related to its mass m by W = m.

# data[].attributes.body
Pressure exerted by liquids and gases.Pressure exerted by liquid at the bottom of the container (in which it is filled) depends upon the height of water filled in the container.

# data[].attributes.body
Example

# data[].attributes.body
The pressure a gas exerts on the walls of a container is the collective force collisions of the gas molecules exerton the container walls, per unit of surface area.