PhySoc

3. at ultraviolet wavelengths between approximately 10 and 320 nanometres
5. one ____ converts to 931 MeV
7. the time taken for the radioactivity of a specified isotope to fall to half its original value
10. a soviet union physicist and the world war 2 veteran
11. a unit used to measure the intensity of a sound or the power level of an electrical signal by comparing it with a given level on a logarithmic scale
13. maximum mass of the dwarf star
16. the displacement of the spectrum to shorter wavelengths in the light coming from distant celestial objects moving toward the observer
18. consisting of two or more simple machines operating together
19. determines speed of light in the medium
20. third derivative of position

1. the great size or extent of something
2. change in the frequency of sound, light, or any other wave as the source and the observer move towards or away.
4. which of Kepler's law states that the planets move in elliptical orbits, with the sun at one focus?
6. is used to refer to observations of electromagnetic
8. complex radio source which appears to be located at almost the galactic center of Milky Way
9. a point on the wave where the displacement of the medium is at a maximum
12. M1/2L −3/2 is the dimension of
14. the action of spreading the light from a light source evenly so as to reduce glare and harsh shadows
15. the "lost mass" of an atom that is converted to binding energy is
17. the perpendicular distance from the axis of rotation to the point where the force is exerted