Can you tell me what a substance is

Explanation:

a particular kind of matter with uniform properties.

a particular kind of matter with uniform properties or the real physical matter of which a person or thing consists and which has a tangible, solid presence.

Explanation:

the arctic is a region of the planet, north of the arctic circle, and includes the arctic ocean, greenland, baffin island, other smaller northern islands, and the far northern parts of europe, russia (siberia), alaska and canada.

in simple terms, the principle states that the buoyancy force on an object is equal to the weight of the fluid displaced by the object, or the density of the fluid multiplied by the submerged volume times the gravitational acceleration, g. this is also known as upthrust.