PHYSICS

2. a quantity having direction as well as magnitude, especially as determining the position of one point in space relative to another
4. the branch of science concerned with the nature and properties of matter and energy
5. the rate at which someone or something is able to move or operate
7. the great size or extent of something
9. a thing that represents or stands for something else, especially a material object representing something abstract:
11. (of a quantity) having only magnitude, not direction
14. the process of equating one thing with another:
16. an amount of space between two things or people
18. the action or process of moving or being moved

1. the measurement from base to top or (of a standing person) from head to foot:
3. a course along which someone or something moves
6. the quantity of matter that a body contains, as measured by its acceleration under a given force or by the force exerted on it by a gravitational field.
8. the component of an electric field due to free separated charges, regardless of any polarizing effects.
10. a prescribed and more or less invariable way of doing something to achieve a particular end
12. the indefinite continued progress of existence and events in the past, present, and future regarded as a whole:
13. the speed of something in a given direction
15. a value or component that may be expressed in numbers.
17. a quantity chosen as a standard in terms of which other quantities may be expressed