Velocity is moving against each other cancel each other out. What is the velocity of a airplane that flies at 500 m/h and then encounters a 50 m/h headwind(wind going against the direction of the plane)?

i guess that visual aids present persuasive examples to what you are presenting, some factors would be theme (does it fit with the color, information, what you are presenting), size (can you see it, is it a big enough span of data/information), and overall look of the visual aid.

hope this : )

molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.