Answer: low frequency & low energy
Explanation:
A contract between a worker and an employer in which the worker agrees not to remain in or join a union.
The Doppler Effect is also known as red shift. Red shift shows the distance of galaxies. The redder the shift then the further away the galaxy, however the bluer the galaxy then the closer it is. Red Shift shows that the universe is continuously expanding. <span />
The is should be C, Im not 100% sure though...
