Studying red shift in light is important to astronomers because it provides evidence
that the
A. Sun is a star
B. Universe is expanding
C. Planets are rotating
D. Light year is a useful unit

most likely he is cheating on you

passing a magnet thought the

mixture , because iron gets attracted to magnet .

in scientific notation, the value of the  speed of light in a vacuum

  will be written as 2.995 * 10^8. when this value is represented in the form of

  a * 10^b, then, a = 2.995 and b = 8.

the value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. in this case, the scientific notation will be written as 3 *10^8.