Well, you would have to divide 150 metres by 18 seconds.
150/18 = 8 1/3 m/s OR 8.333 m/s
I guess it is A and i think i m correct
You can infer that the different elements have different light spectrum frequencies, causing the different light colors.
Answer:
Comets are frozen leftovers from the formation of the solar system composed of dust, rock, and ices. They range from a few miles to tens of miles wide, but as they orbit closer to the Sun, they heat up and spew gases and dust into a glowing head that can be larger than a planet.
