Question

5 questions
1 according to the text, what is pressure?
a the speed atoms and molecules travel in a container
b the direction atoms and molecules travel when they strike a surface
c the force atoms and molecules exert when they strike a surface
d the layer of atoms and molecules in a container

Explanation:

To determine the correct answer about pressure, we recall the definition of pressure in the context of gas molecules (from Physics, a subfield of Natural Science). Pressure is defined as the force exerted per unit area by gas atoms or molecules when they collide with the walls of a container (or a surface).

• Option A is incorrect because pressure is not about the speed of atoms/molecules in the container, but about the force from their collisions.
• Option B is incorrect as pressure is not related to the direction of travel during collisions, but the force of the collisions.
• Option C is correct because when atoms/molecules strike a surface (like the container wall), the force they exert (divided by the area) is pressure.
• Option D is incorrect as pressure is not about the layer of atoms/molecules in the container, but the force from their collisions with surfaces.

Answer:

C. the force atoms and molecules exert when they strike a surface