Across
- 1. Unit of sound level.
- 5. Unit of frequency equal to one event or cycle per second.
- 7. A variant of a particular chemical element which differs in neutron number.
- 8. A mathematical statement or hypothesis which has been proved on the basis of previously established _______ and previously accepted axioms, effectively the proof of the truth of a statement or expression.
- 9. The study of the formal laws of reasoning.
- 10. The act of squaring, or finding a square equal in area to a given figure, or finding the area of a geometrical figure or the area under a curve (such as by a process of numerical integration).
- 11. A number which, when multiplied by x yields the multiplicative identity 1, and can therefore be thought of as the inverse of multiplication, e.g. the _______ of x is 1⁄x .
- 12. Ratio of output work to input work.
- 14. It is a massive and extremely remote celestial object, emitting exceptionally large amounts of energy, and typically having a starlike image in a telescope. It has been suggested that _____ contain massive black holes and may represent a stage in the evolution of some galaxies.
- 15. Change from liquid to vapor state.
- 17. It is an elementary particle and a fundamental constituent of matter, the main constituent of a proton.
- 20. An ordered set whose elements are usually determined based on some function of the counting numbers, e.g. an arithmetic ______ is a set where each element is the previous element plus or minus a number.
- 21. Small quantities of material added to semiconductor to increase electrical conduction.
- 23. Unit of luminous intensity.
Down
- 2. A member of, or an object in, a set.
- 3. A proposition that is not actually proved or demonstrated, but is considered to be self-evident and universally accepted as a starting point for deducing and inferring other truths and theorems, without any need of proof.
- 4. The part of mathematics concerned with the size, shape and relative position of figures, or the study of lines, angles, shapes and their properties.
- 6. A physical quantity having magnitude and direction, represented by a directed arrow indicating its orientation in space.
- 9. The point towards which a series or function converges.
- 10. A number system that extends complex numbers to four dimensions (so that an object is described by a real number and three complex numbers, all mutually perpendicular to each other), which can be used to represent a three-dimensional rotation by just an angle and a vector.
- 13. A rectangular array of numbers, which can be added, subtracted and multiplied, and used to represent linear transformations and vectors, solve equations, etc.
- 16. Device used to receive or transmit electromagnetic waves.
- 18. Closeness of a measurement to the standard value of that quantity.
- 19. Product of force and time interval over which it acts.
- 22. The steepness or incline of a line, determined by reference to two points on the line.