Which of the following would be classified as a fluid ?

Question

1.solid

2.liquid

3.gas

4.gas and solid

5.liquid and gas

thank you very much

Answer 1

The states of matter are solid, liquid, gas and plasma. A fluid is a subset of the states of matter, consisting of liquids, gases and plasmas. This is because they have common properties that are distinct from solids. A fluid does not have a specific shape as does a solid. Instead, fluids take the shape of their containers. They also will flow or pour when under the influence of a force such as gravity

Solids have specific shapes because the molecular forces holding particles in place are stronger than the kinetic energy of the molecules. Usually, the molecules just vibrate in place, with little or no other movement.

On the other hand, fluids exist at higher temperatures and thus their particles have greater kinetic energy. The shape of a fluid adapts to its environment or container.

Liquids

A liquid in space will form the natural shape of a sphere. This is because the attraction between its atoms or molecules is greater than the forces from their kinetic energy moving outward. A sphere is a shape with the smallest surface area for a given volume of material.

A liquid sphere or drop of liquid—such as water—that is falling toward the Earth through the atmosphere will be a slightly flattened sphere, due to the air resistance.

If you spill some water on the floor, it will splash and spread out on the floor. Liquids like thin oil will spread out even more than water on the floor.

Gases

The molecules in a gas have more energy than when the material is in the liquid state, such that they overcome the molecular forces. A gas in space or in the atmosphere will continually spread in a shapeless form.

A gas that is heavier than air may gravitate toward the floor, where it then spreads out.

The rate that the gas expands is a function of its temperature or kinetic energy of its particles.

Plasmas

A plasma is an ionized gas, usually at extremely high temperatures. That means some of its electrons have been stripped off. Plasmas have most of the same properties as gases.

Under the influence of gravity, a fluid will take the shape of its container, provided the volume of the container is greater than or equal to the volume of the fluid.

Answer 2

5. Liquid and gas are fluids.  They can flow, and take the shape of their container.

Answer 3

obviously solid is wrong and obviously liquid is right. That leaves you with choice 2 or 5. So is gas a fluid? Yes, it is! ANS choice 5 is correct!