W=F*s
W=9000*0
W=0
W:Work
F:Force
s:Distance
Explanation:
First convert the speed into m/s and time into seconds
Answer:
The act of using senses or tools to gather information is called <em>Obser</em><em>vation</em><em>.</em>
Answer:
I only speak English
Explanation:
I'm sorry can you type it in English
Because dark line spectra result from passing white light through ionized gasses and plasmas, which is what the atmosphere of stars are made of. These frequencies are scattered by the star's atmosphere as it leaves the surface (photosphere) of the star, and don't make it to earth.