all the stars we observe from earth emit light that is shifted, to varying degrees, to longer wavelengths. This evidence is used to support the big bang theory because it shows that stars we observe-

Can you guys me with question no. 5!

Which statement about sound is not true? a. air particles travel with sound waves. b. sound waves cannot travel through a vacuum. c. sound waves exist even if no one hears them. d. air particles vibrate along the path of a sound wave.

How many moles of carbon dioxide will form if 2.5 moles of c3h8 is burned