Physics Crossword

3. the splitting of an atomic nucleus into approximately equal parts, either spontaneously or as a result of the impact of a particle usually with an associated release of energy, such as in a nuclear bomb.
4. a flow of electric charge through a conductor.
8. The name of the puzzle creator, starts with "N" ends with "B".
10. The study of the universe and how it evolved the way it did.
11. the time taken for half of the atoms in a radioactive material to undergo decay.
14. The rate of increase of speed or the rate of change of velocity.
16. My teacher calls himself:
17. A combination of two or more electrical cells which produces electricity.
19. A variant of a particular chemical element with a different number of neutrons.

1. The SI unit of work or energy.
2. a substance, body, or system that conducts electricity, heat, etc.
4. Having an outline or surface curved like the exterior of a circle or sphere.
5. a reaction in which two nuclei combine to form a nucleus with the release of energy, the most obvious example: the sun.
6. An American theoretical physicist famed for his story telling abilities and unique approach to learning.
7. the force of attraction that moves or tends to move bodies towards the center of a celestial body, such as the earth or moon.
9. the tendency of a body to preserve its state of rest or uniform motion unless acted upon by an external force.
10. Means curving inwards.
12. An English mathematician, physicist, astronomer, and theologian most famous for his observations on the laws of motion.
13. A form of matter composed of antiparticles, such as antihydrogen, consisting of antiprotons and positrons.
15. a stable elementary particle present in all atoms, orbiting the nucleus in numbers equal to the atomic number of the element in the neutral atom.
18. the derived SI unit of frequency.